diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index b82fcca..0b1db76 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -7,12 +7,56 @@ on:
     branches: [ "main" ]
 
 jobs:
-
   build:
-
     runs-on: ubuntu-latest
+    timeout-minutes: 3
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Build the Docker image
-      run: docker build . --file Dockerfile --tag testnet-docker-image:$(date +%s)
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to Docker Hub (if credentials available)
+      if: github.event_name != 'pull_request'
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+      continue-on-error: true
+
+    - name: Extract metadata
+      id: meta
+      shell: bash
+      run: |
+        set -euo pipefail
+        echo "tag=$(date +%s)" >> $GITHUB_OUTPUT
+        echo "sha=${GITHUB_SHA::8}" >> $GITHUB_OUTPUT
+
+    - name: Build Docker image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        file: ./Dockerfile
+        tags: |
+          testnet-docker-image:${{ steps.meta.outputs.tag }}
+          testnet-docker-image:${{ steps.meta.outputs.sha }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+        push: false
+        load: true
+
+    - name: Test Docker image
+      shell: bash
+      run: |
+        set -euo pipefail
+        docker images | grep testnet-docker-image
+        echo "Docker image built successfully"
+
+    - name: Cleanup
+      if: always()
+      shell: bash
+      run: |
+        set -euo pipefail
+        docker system prune -f || true
diff --git a/.github/workflows/test-start-node.yml b/.github/workflows/test-start-node.yml
index f8bcf45..8195b49 100644
--- a/.github/workflows/test-start-node.yml
+++ b/.github/workflows/test-start-node.yml
@@ -9,35 +9,118 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
+    timeout-minutes: 3
 
     steps:
-    - uses: actions/checkout@v3
+    - name: Checkout code
+      uses: actions/checkout@v4
 
-    - name: Set up Docker
-      uses: docker/setup-buildx-action@v1
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
 
-    - name: Install Docker Compose
+    - name: Verify Docker Compose
+      shell: bash
       run: |
-        sudo apt-get update
-        sudo apt-get install -y docker-compose
+        set -euo pipefail
+        if docker compose version >/dev/null 2>&1; then
+          echo "Using Docker Compose plugin"
+          docker compose version
+        elif command -v docker-compose >/dev/null 2>&1; then
+          echo "Using docker-compose standalone"
+          docker-compose --version
+        else
+          echo "Error: Docker Compose not available"
+          exit 1
+        fi
 
-    - name: Start Preprod node, wait 30s then stop node
+    - name: Test Preprod node
       shell: bash
+      timeout-minutes: 10
       run: |
-        printf "1\n" | /bin/bash ./start-node.sh 2>&1 | tee script_output.txt &
+        set -euo pipefail
+        printf "2\n1\n" | ./start-node.sh 2>&1 | tee preprod_output.txt &
+        START_PID=$!
         sleep 30
-        /bin/bash ./stop-nodes.sh
+        if ! kill -0 $START_PID 2>/dev/null; then
+          echo "Error: start-node.sh process died unexpectedly"
+          exit 1
+        fi
+        ./stop-nodes.sh
+        wait $START_PID || true
+        if [ -f preprod_output.txt ]; then
+          echo "=== Preprod Node Output ==="
+          cat preprod_output.txt
+        fi
+
+    - name: Cleanup after Preprod
+      if: always()
+      shell: bash
+      run: |
+        set -euo pipefail
+        ./stop-nodes.sh || true
+        docker ps -a --filter "name=node-" --format "{{.Names}}" | xargs -r docker rm -f || true
 
-    - name: Start Preview node, wait 30s then stop node
+    - name: Test Preview node
       shell: bash
+      timeout-minutes: 3
       run: |
-        printf "2\n" | /bin/bash ./start-node.sh 2>&1 | tee script_output.txt &
+        set -euo pipefail
+        printf "3\n1\n" | ./start-node.sh 2>&1 | tee preview_output.txt &
+        START_PID=$!
         sleep 30
-        /bin/bash ./stop-nodes.sh
+        if ! kill -0 $START_PID 2>/dev/null; then
+          echo "Error: start-node.sh process died unexpectedly"
+          exit 1
+        fi
+        ./stop-nodes.sh
+        wait $START_PID || true
+        if [ -f preview_output.txt ]; then
+          echo "=== Preview Node Output ==="
+          cat preview_output.txt
+        fi
 
-    - name: Start SanchoNet node, wait 30s then stop node
+    - name: Cleanup after Preview
+      if: always()
       shell: bash
       run: |
-        printf "3\n" | /bin/bash ./start-node.sh 2>&1 | tee script_output.txt &
+        set -euo pipefail
+        ./stop-nodes.sh || true
+        docker ps -a --filter "name=node-" --format "{{.Names}}" | xargs -r docker rm -f || true
+
+    - name: Test SanchoNet node
+      shell: bash
+      timeout-minutes: 3
+      run: |
+        set -euo pipefail
+        printf "4\n1\n" | ./start-node.sh 2>&1 | tee sancho_output.txt &
+        START_PID=$!
         sleep 30
-        /bin/bash ./stop-nodes.sh
\ No newline at end of file
+        if ! kill -0 $START_PID 2>/dev/null; then
+          echo "Error: start-node.sh process died unexpectedly"
+          exit 1
+        fi
+        ./stop-nodes.sh
+        wait $START_PID || true
+        if [ -f sancho_output.txt ]; then
+          echo "=== SanchoNet Node Output ==="
+          cat sancho_output.txt
+        fi
+
+    - name: Final cleanup
+      if: always()
+      shell: bash
+      run: |
+        set -euo pipefail
+        ./stop-nodes.sh || true
+        docker ps -a --filter "name=node-" --format "{{.Names}}" | xargs -r docker rm -f || true
+        docker system prune -f || true
+
+    - name: Upload logs on failure
+      if: failure()
+      uses: actions/upload-artifact@v4
+      with:
+        name: node-logs
+        path: |
+          *_output.txt
+          script_output.txt
+        retention-days: 7
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index bea5e1c..820782e 100755
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -18,6 +18,7 @@ services:
       - ./keys:/keys
       - ./txs:/txs
       - ./dumps:/dumps
+      - ./utilities:/utilities
     logging:
       driver: "json-file"
       options:
diff --git a/scripts/cc/authorize-hot-key.sh b/scripts/cc/authorize-hot-key.sh
index 49f63d2..64a684e 100755
--- a/scripts/cc/authorize-hot-key.sh
+++ b/scripts/cc/authorize-hot-key.sh
@@ -1,16 +1,17 @@
 #!/bin/bash
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/cc"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/cc"
 tx_path_stub="$txs_dir/auth-hot"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
diff --git a/scripts/cc/generate-cc-keys.sh b/scripts/cc/generate-cc-keys.sh
index 2f8d8b5..abc044f 100755
--- a/scripts/cc/generate-cc-keys.sh
+++ b/scripts/cc/generate-cc-keys.sh
@@ -1,10 +1,11 @@
 #!/bin/bash
 
-# Define directories
-keys_dir="./keys"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
diff --git a/scripts/cc/generate-new-hot-key.sh b/scripts/cc/generate-new-hot-key.sh
index faffd1a..0f1f781 100755
--- a/scripts/cc/generate-new-hot-key.sh
+++ b/scripts/cc/generate-new-hot-key.sh
@@ -1,10 +1,11 @@
 #!/bin/bash
 
-# Define directories
-keys_dir="./keys"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
diff --git a/scripts/cc/resign-cold-key.sh b/scripts/cc/resign-cold-key.sh
index c06538f..11c20c4 100755
--- a/scripts/cc/resign-cold-key.sh
+++ b/scripts/cc/resign-cold-key.sh
@@ -1,17 +1,17 @@
 #!/bin/bash
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/cc"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/cc"
 tx_path_stub="$txs_dir/resign-cold"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
diff --git a/scripts/cc/vote.sh b/scripts/cc/vote.sh
index 4df9519..8eab0a6 100755
--- a/scripts/cc/vote.sh
+++ b/scripts/cc/vote.sh
@@ -8,17 +8,18 @@ GA_TX_INDEX="0"
 
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/cc"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/cc"
 tx_path_stub="$txs_dir/cc-vote"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
diff --git a/scripts/drep/create-and-register-multisig.sh b/scripts/drep/create-and-register-multisig.sh
index 0c24c0c..dc8b993 100755
--- a/scripts/drep/create-and-register-multisig.sh
+++ b/scripts/drep/create-and-register-multisig.sh
@@ -1,11 +1,12 @@
 #!/bin/bash
 
-# Define directories
-keys_dir="./keys"
-txs_dir="./txs/multi-sig"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/multi-sig"
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
diff --git a/scripts/drep/delegate-to-self.sh b/scripts/drep/delegate-to-self.sh
index abd21ff..88d9e30 100755
--- a/scripts/drep/delegate-to-self.sh
+++ b/scripts/drep/delegate-to-self.sh
@@ -1,15 +1,45 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/drep"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/drep"
 tx_path_stub="$txs_dir/vote-deleg-tx"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/drep.id" ]; then
+  echo "Error: DRep ID file not found: $keys_dir/drep.id"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.vkey" ]; then
+  echo "Error: Stake verification key not found: $keys_dir/stake.vkey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.skey" ]; then
+  echo "Error: Stake signing key not found: $keys_dir/stake.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,34 +53,69 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
-echo "Delegating your voting rights to your DRep ID ($(cat $keys_dir/drep.id))"
+echo "Delegating your voting rights to your DRep ID ($(cat "$keys_dir/drep.id"))"
 
 container_cli conway stake-address vote-delegation-certificate \
- --stake-verification-key-file $keys_dir/stake.vkey \
- --drep-key-hash "$(cat $keys_dir/drep.id)" \
- --out-file $tx_cert_path
+ --stake-verification-key-file "$keys_dir/stake.vkey" \
+ --drep-key-hash "$(cat "$keys_dir/drep.id")" \
+ --out-file "$tx_cert_path"
+
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
  --witness-override 2 \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
- --certificate-file $tx_cert_path \
- --out-file $tx_unsigned_path
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
+ --certificate-file "$tx_cert_path" \
+ --out-file "$tx_unsigned_path"
+
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
 
 echo "Signing transaction"
 
 container_cli conway transaction sign \
- --tx-body-file $tx_unsigned_path \
- --signing-key-file $keys_dir/payment.skey \
- --signing-key-file $keys_dir/stake.skey \
- --out-file $tx_signed_path
+ --tx-body-file "$tx_unsigned_path" \
+ --signing-key-file "$keys_dir/payment.skey" \
+ --signing-key-file "$keys_dir/stake.skey" \
+ --out-file "$tx_signed_path"
+
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
 
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
\ No newline at end of file
+container_cli conway transaction submit --tx-file "$tx_signed_path"
\ No newline at end of file
diff --git a/scripts/drep/register.sh b/scripts/drep/register.sh
index ba00cbb..c8eb344 100755
--- a/scripts/drep/register.sh
+++ b/scripts/drep/register.sh
@@ -1,15 +1,40 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/drep"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/drep"
 tx_path_stub="$txs_dir/drep-register-tx"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/drep.id" ]; then
+  echo "Error: DRep ID file not found: $keys_dir/drep.id"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/drep.skey" ]; then
+  echo "Error: DRep signing key not found: $keys_dir/drep.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,35 +48,70 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Registering you as a drep
 echo "Registering you as a DRep."
 
 container_cli conway governance drep registration-certificate \
- --drep-key-hash "$(cat $keys_dir/drep.id)" \
- --key-reg-deposit-amt "$(container_cli conway query gov-state | jq -r .currentPParams.dRepDeposit)" \
- --out-file $tx_cert_path
+ --drep-key-hash "$(cat "$keys_dir/drep.id")" \
+ --key-reg-deposit-amt "$(container_cli conway query gov-state | jq -r '.currentPParams.dRepDeposit')" \
+ --out-file "$tx_cert_path"
+
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
  --witness-override 2 \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
- --certificate-file $tx_cert_path \
- --out-file $tx_unsigned_path
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
+ --certificate-file "$tx_cert_path" \
+ --out-file "$tx_unsigned_path"
+
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
 
 echo "Signing transaction"
 
 container_cli conway transaction sign \
- --tx-body-file $tx_unsigned_path \
- --signing-key-file $keys_dir/payment.skey \
- --signing-key-file $keys_dir/drep.skey \
- --out-file $tx_signed_path
+ --tx-body-file "$tx_unsigned_path" \
+ --signing-key-file "$keys_dir/payment.skey" \
+ --signing-key-file "$keys_dir/drep.skey" \
+ --out-file "$tx_signed_path"
+
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
 
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
\ No newline at end of file
+container_cli conway transaction submit --tx-file "$tx_signed_path"
\ No newline at end of file
diff --git a/scripts/drep/retire.sh b/scripts/drep/retire.sh
index fd08083..7226fb1 100755
--- a/scripts/drep/retire.sh
+++ b/scripts/drep/retire.sh
@@ -1,15 +1,40 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/drep"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/drep"
 tx_path_stub="$txs_dir/drep-retire-tx"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/drep.id" ]; then
+  echo "Error: DRep ID file not found: $keys_dir/drep.id"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/drep.skey" ]; then
+  echo "Error: DRep signing key not found: $keys_dir/drep.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,35 +48,70 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Retiring you as a drep
 echo "Retiring you as a DRep."
 
 container_cli conway governance drep retirement-certificate \
- --drep-key-hash $(cat $keys_dir/drep.id) \
- --deposit-amt $(container_cli conway query gov-state | jq -r .currentPParams.dRepDeposit) \
- --out-file $tx_cert_path
+ --drep-key-hash "$(cat "$keys_dir/drep.id")" \
+ --deposit-amt "$(container_cli conway query gov-state | jq -r '.currentPParams.dRepDeposit')" \
+ --out-file "$tx_cert_path"
+
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
  --witness-override 2 \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
- --certificate-file $tx_cert_path \
- --out-file $tx_unsigned_path
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
+ --certificate-file "$tx_cert_path" \
+ --out-file "$tx_unsigned_path"
+
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
 
 echo "Signing transaction"
 
 container_cli conway transaction sign \
- --tx-body-file $tx_unsigned_path \
- --signing-key-file $keys_dir/payment.skey \
- --signing-key-file $keys_dir/drep.skey \
- --out-file $tx_signed_path
+ --tx-body-file "$tx_unsigned_path" \
+ --signing-key-file "$keys_dir/payment.skey" \
+ --signing-key-file "$keys_dir/drep.skey" \
+ --out-file "$tx_signed_path"
+
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
 
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/drep/vote.sh b/scripts/drep/vote.sh
index 278505c..d5d0b9b 100755
--- a/scripts/drep/vote.sh
+++ b/scripts/drep/vote.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 
@@ -11,16 +12,39 @@ ANCHOR_HASH="5c783d31732ab3661a17879a41b0fd482a0d0befc63e7735641f7c82ba88f00e"
 
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/drep"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/drep"
 tx_path_stub="$txs_dir/drep-vote-tx"
 tx_cert_path="$tx_path_stub.vote"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/drep.vkey" ]; then
+  echo "Error: DRep verification key not found: $keys_dir/drep.vkey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/drep.skey" ]; then
+  echo "Error: DRep signing key not found: $keys_dir/drep.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -34,7 +58,21 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Voting on a governance action
@@ -44,30 +82,51 @@ container_cli conway governance vote create \
   "--$CHOICE" \
   --governance-action-tx-id "$GA_TX_HASH" \
   --governance-action-index "$GA_TX_INDEX" \
-  --drep-verification-key-file $keys_dir/drep.vkey \
+  --drep-verification-key-file "$keys_dir/drep.vkey" \
   --anchor-data-hash "$ANCHOR_HASH" \
   --anchor-url "$ANCHOR_URI" \
   --check-anchor-data-hash \
-  --out-file $tx_cert_path
+  --out-file "$tx_cert_path"
+
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
-  --tx-in "$(container_cli conway query utxo --address "$(cat $keys_dir/payment.addr)" --out-file /dev/stdout | jq -r 'keys[0]')" \
-  --change-address "$(cat $keys_dir/payment.addr)" \
-  --vote-file $tx_cert_path \
+  --tx-in "$utxo" \
+  --change-address "$payment_addr" \
+  --vote-file "$tx_cert_path" \
   --witness-override 2 \
-  --out-file $tx_unsigned_path
+  --out-file "$tx_unsigned_path"
+
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
 
 echo "Signing transaction"
 
 container_cli conway transaction sign \
-  --tx-body-file $tx_unsigned_path \
-  --signing-key-file $keys_dir/drep.skey \
-  --signing-key-file $keys_dir/payment.skey \
-  --out-file $tx_signed_path
+  --tx-body-file "$tx_unsigned_path" \
+  --signing-key-file "$keys_dir/drep.skey" \
+  --signing-key-file "$keys_dir/payment.skey" \
+  --out-file "$tx_signed_path"
+
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
 
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/ga/hardfork.sh b/scripts/ga/hardfork.sh
index 99ce1fb..42757b2 100755
--- a/scripts/ga/hardfork.sh
+++ b/scripts/ga/hardfork.sh
@@ -8,17 +8,18 @@ METADATA_URL="https://raw.githubusercontent.com/IntersectMBO/governance-actions/
 METADATA_HASH="8a1bd37caa6b914a8b569adb63a0f41d8f159c110dc5c8409118a3f087fffb43"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/ga"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/ga"
 tx_path_stub="$txs_dir/hardfork"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
@@ -72,7 +73,7 @@ echo "Signing transaction"
 container_cli conway transaction sign \
  --tx-body-file "$tx_unsigned_path" \
  --signing-key-file $keys_dir/payment.skey \
- --out-file "$tx_unsigned_path"
+ --out-file "$tx_signed_path"
 
 # Submit the transaction
 echo "Submitting transaction"
diff --git a/scripts/ga/info.sh b/scripts/ga/info.sh
index 7a44ef9..bafd0ff 100755
--- a/scripts/ga/info.sh
+++ b/scripts/ga/info.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 
@@ -7,16 +8,34 @@ METADATA_HASH="2df56fcaaa6d6bd73e792b871b746cd9c6209e95a2f0e6344502be9f7abf5567"
 
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/ga"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/ga"
 tx_path_stub="$txs_dir/info"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.vkey" ]; then
+  echo "Error: Stake verification key not found: $keys_dir/stake.vkey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -30,7 +49,21 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Building, signing and submitting an info governance action
@@ -38,29 +71,50 @@ echo "Creating and submitting info governance action."
 
 container_cli conway governance action create-info \
   --testnet \
-  --governance-action-deposit $(container_cli conway query gov-state | jq -r '.currentPParams.govActionDeposit') \
-  --deposit-return-stake-verification-key-file $keys_dir/stake.vkey \
-  --anchor-url $METADATA_URL \
-  --anchor-data-hash $METADATA_HASH \
+  --governance-action-deposit "$(container_cli conway query gov-state | jq -r '.currentPParams.govActionDeposit')" \
+  --deposit-return-stake-verification-key-file "$keys_dir/stake.vkey" \
+  --anchor-url "$METADATA_URL" \
+  --anchor-data-hash "$METADATA_HASH" \
   --check-anchor-data \
   --out-file "$tx_cert_path"
 
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
+
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
- --tx-in "$(container_cli conway query utxo --address "$(cat $keys_dir/payment.addr)" --out-file /dev/stdout | jq -r 'keys[0]')" \
- --change-address "$(cat $keys_dir/payment.addr)" \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
  --proposal-file "$tx_cert_path" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 echo "Signing transaction"
 
 container_cli conway transaction sign \
  --tx-body-file "$tx_unsigned_path" \
- --signing-key-file $keys_dir/payment.skey \
+ --signing-key-file "$keys_dir/payment.skey" \
  --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/ga/new-committee.sh b/scripts/ga/new-committee.sh
index 5c706aa..507ae2f 100755
--- a/scripts/ga/new-committee.sh
+++ b/scripts/ga/new-committee.sh
@@ -8,17 +8,18 @@ METADATA_URL="ipfs://bafkreia4ahcsnfegacpxypsgo2gpno5did6grm7ipqa6k2kivzsctlwlau
 METADATA_HASH="fd23ef0b70a2feaf8229aa1df79ed77f18b07881e35237a569730b2b261b99fc"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/ga"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/ga"
 tx_path_stub="$txs_dir/new-committee"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
diff --git a/scripts/ga/new-consitution.sh b/scripts/ga/new-consitution.sh
index 9e656b4..c8b3e9d 100755
--- a/scripts/ga/new-consitution.sh
+++ b/scripts/ga/new-consitution.sh
@@ -10,17 +10,18 @@ METADATA_URL="https://raw.githubusercontent.com/IntersectMBO/governance-actions/
 METADATA_HASH="4b2649556c838497ee2923bdff0f05b48fb2f0c3c5cceb450200f8bd6868ac5b"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/ga"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/ga"
 tx_path_stub="$txs_dir/new-constitution"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
@@ -36,12 +37,12 @@ container_cli() {
   docker exec -ti $container_name cardano-cli "$@"
 }
 
-# echo "Finding the previous Constitution GA to reference"
+echo "Finding the previous Constitution GA to reference"
 
-# GOV_STATE=$(container_cli conway query gov-state | jq -r '.nextRatifyState.nextEnactState.prevGovActionIds')
+GOV_STATE=$(container_cli conway query gov-state | jq -r '.nextRatifyState.nextEnactState.prevGovActionIds')
 
-# PREV_GA_TX_HASH=$(echo "$GOV_STATE" | jq -r '.Constitution.txId')
-# PREV_GA_INDEX=$(echo "$GOV_STATE" | jq -r '.Constitution.govActionIx')
+PREV_GA_TX_HASH=$(echo "$GOV_STATE" | jq -r '.Constitution.txId')
+PREV_GA_INDEX=$(echo "$GOV_STATE" | jq -r '.Constitution.govActionIx')
 
 echo "Previous Constitution GA Tx Hash: $PREV_GA_TX_HASH#$PREV_GA_INDEX"
 
@@ -59,11 +60,10 @@ container_cli conway governance action create-constitution \
   --constitution-hash "$NEW_CONSTITUTION_ANCHOR_HASH" \
   --check-constitution-hash \
   --constitution-script-hash "$NEW_CONSTITUTION_SCRIPT_HASH" \
+  --prev-governance-action-tx-id "$PREV_GA_TX_HASH" \
+  --prev-governance-action-index "$PREV_GA_INDEX" \
   --out-file "$tx_cert_path"
 
-  # --prev-governance-action-tx-id "$PREV_GA_TX_HASH" \
-  # --prev-governance-action-index "$PREV_GA_INDEX" \
-
 echo "Building transaction"
 
 container_cli conway transaction build \
@@ -75,7 +75,7 @@ container_cli conway transaction build \
 echo "Signing transaction"
 
 container_cli conway transaction sign \
- --tx-body-file "$tx_unigned_path" \
+ --tx-body-file "$tx_unsigned_path" \
  --signing-key-file $keys_dir/payment.skey \
  --out-file "$tx_signed_path"
 
diff --git a/scripts/ga/no-confidence.sh b/scripts/ga/no-confidence.sh
index 35e079d..b9fe80a 100755
--- a/scripts/ga/no-confidence.sh
+++ b/scripts/ga/no-confidence.sh
@@ -8,17 +8,18 @@ METADATA_URL="https://raw.githubusercontent.com/IntersectMBO/governance-actions/
 METADATA_HASH="ab901c3aeeca631ee5c70147a558fbf191a4af245d8ca001e845d8569d7c38f9"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/ga"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/ga"
 tx_path_stub="$txs_dir/no-confidence"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
diff --git a/scripts/ga/parameter.sh b/scripts/ga/parameter.sh
index d4753f7..c9f4adb 100755
--- a/scripts/ga/parameter.sh
+++ b/scripts/ga/parameter.sh
@@ -5,19 +5,18 @@ METADATA_URL="ipfs://bafkreia5vseqm3hqmds45gje4szvekwkzd4mebzeepbh2cdlr3krxcj2ou
 METADATA_HASH="dfa2df398319b48e80a2caf02f4165bf12b6689d0ed57eee5e13dfa94857ed71"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/ga"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/ga"
 tx_path_stub="$txs_dir/parameter-change"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-guardrails_script_path="./config/guardrails-script.plutus"
-
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
@@ -28,6 +27,11 @@ fi
 
 echo "Using running container: $container_name"
 
+# Extract network and version from container name (format: node-network-version-container)
+network=$(echo $container_name | cut -d'-' -f2)
+version=$(echo $container_name | cut -d'-' -f3)
+guardrails_script_path="$project_root/node-$network-$version/config/guardrails-script.plutus"
+
 # Function to execute cardano-cli commands inside the container
 container_cli() {
   docker exec -ti $container_name cardano-cli "$@"
diff --git a/scripts/ga/treasury.sh b/scripts/ga/treasury.sh
index bf7f673..a2cbaae 100755
--- a/scripts/ga/treasury.sh
+++ b/scripts/ga/treasury.sh
@@ -11,19 +11,18 @@ METADATA_HASH="91a36ac3cc4b563a407e7a86139fee9e7e2b2a6511617b96ba3165ccddf5a5b3"
 # treat unset variables as an error, and fail if any command in a pipeline fails
 set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/ga"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/ga"
 tx_path_stub="$txs_dir/treasury-withdrawal"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-guardrails_script_path="./config/guardrails-script.plutus"
-
-# Get the script's directory
-script_dir=$(dirname "$0")
-
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
 
@@ -34,6 +33,11 @@ fi
 
 echo "Using running container: $container_name"
 
+# Extract network and version from container name (format: node-network-version-container)
+network=$(echo $container_name | cut -d'-' -f2)
+version=$(echo $container_name | cut -d'-' -f3)
+guardrails_script_path="$project_root/node-$network-$version/config/guardrails-script.plutus"
+
 # Function to execute cardano-cli commands inside the container
 container_cli() {
   docker exec -ti $container_name cardano-cli "$@"
diff --git a/scripts/generate-keys.sh b/scripts/generate-keys.sh
index dfd5d05..1091bee 100755
--- a/scripts/generate-keys.sh
+++ b/scripts/generate-keys.sh
@@ -1,10 +1,15 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define the keys directory
-keys_dir="./keys"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+
+# Create keys directory if it doesn't exist
+mkdir -p "$keys_dir"
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/helper/get-container.sh")"
@@ -14,9 +19,9 @@ if [ -z "$container_name" ]; then
   exit 1
 fi
 
-network=$(echo $container_name | cut -d'-' -f2)
+network=$(echo "$container_name" | cut -d'-' -f2)
 
-if [ $network = "mainnet" ]; then
+if [ "$network" = "mainnet" ]; then
   echo "These scripts are not secure and should not be used to create mainnet transactions!!"
   echo "Exiting."
   exit 0
@@ -26,7 +31,7 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
 # Check if keys already exist
diff --git a/scripts/helper/combine-utxos.sh b/scripts/helper/combine-utxos.sh
index 44dd662..01a6df5 100755
--- a/scripts/helper/combine-utxos.sh
+++ b/scripts/helper/combine-utxos.sh
@@ -1,11 +1,25 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directories
-keys_dir="./keys"
-txs_dir="./txs/"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/helper"
+
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -19,27 +33,43 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
-echo "Combining all only ada UTxOs at $(cat "$keys_dir/payment.addr")"
+payment_addr=$(cat "$keys_dir/payment.addr")
+echo "Combining all only ada UTxOs at $payment_addr"
 
 # build transaction
+tx_unsigned="$txs_dir/combine-utxos-tx.unsigned"
+tx_signed="$txs_dir/combine-utxos-tx.signed"
+
 container_cli conway transaction build \
-    $(container_cli query utxo --address $(cat "$keys_dir/payment.addr") --out-file /dev/stdout \
+    $(container_cli conway query utxo --address "$payment_addr" --out-file /dev/stdout \
         | jq -r 'to_entries 
         | map(select(.value.datum == null and .value.datumhash == null and .value.inlineDatum == null and .value.inlineDatumRaw == null and .value.referenceScript == null)) 
         | map(" --tx-in " + .key) 
         | .[]') \
-  --change-address $(cat "$keys_dir/payment.addr") \
-  --out-file "$txs_dir/combine-utxos-tx.unsigned"
+  --change-address "$payment_addr" \
+  --out-file "$tx_unsigned"
+
+# Check transaction file was created
+if [ ! -f "$tx_unsigned" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
 
 # Sign transaction
 container_cli conway transaction sign \
-  --tx-body-file "$txs_dir/combine-utxos-tx.unsigned" \
+  --tx-body-file "$tx_unsigned" \
   --signing-key-file "$keys_dir/payment.skey" \
-  --out-file "$txs_dir/combine-utxos-tx.signed"
+  --out-file "$tx_signed"
+
+# Check signed transaction file was created
+if [ ! -f "$tx_signed" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
 
 # Submit transaction
 container_cli conway transaction submit \
-  --tx-file "$txs_dir/combine-utxos-tx.signed"
+  --tx-file "$tx_signed"
diff --git a/scripts/helper/get-container.sh b/scripts/helper/get-container.sh
index dd9197b..0ae075e 100755
--- a/scripts/helper/get-container.sh
+++ b/scripts/helper/get-container.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# set -euo pipefail
 
 # Get the list of running containers
 running_containers=$(docker ps --format '{{.Names}}')
diff --git a/scripts/helper/sign-submit-tx.sh b/scripts/helper/sign-submit-tx.sh
index 6c01e3f..a139bbb 100755
--- a/scripts/helper/sign-submit-tx.sh
+++ b/scripts/helper/sign-submit-tx.sh
@@ -1,18 +1,31 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 TRANSACTION_FILE="treasury-contract"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs"
 
 tx_unsigned_path="$txs_dir/$TRANSACTION_FILE.unsigned"
 tx_signed_path="$txs_dir/$TRANSACTION_FILE.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Unsigned transaction file not found: $tx_unsigned_path"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -26,7 +39,7 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
 # Send ada to the multisig payment script
@@ -34,10 +47,16 @@ echo "Signing and submitting $tx_unsigned_path transaction."
 
 container_cli conway transaction sign \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/multi-sig/create-info-action.sh b/scripts/multi-sig/create-info-action.sh
index c117599..cf4713b 100755
--- a/scripts/multi-sig/create-info-action.sh
+++ b/scripts/multi-sig/create-info-action.sh
@@ -1,20 +1,61 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 METADATA_URL="https://buy-ryan-an-island.com"
 METADATA_HASH="0000000000000000000000000000000000000000000000000000000000000000"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/multi-sig"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/multi-sig"
 tx_path_stub="$txs_dir/info-action"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/multi-sig/script.addr" ]; then
+  echo "Error: Multi-sig script address not found: $keys_dir/multi-sig/script.addr"
+  echo "Please run scripts/multi-sig/generate-keys-and-script.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/multi-sig/script.json" ]; then
+  echo "Error: Multi-sig script JSON not found: $keys_dir/multi-sig/script.json"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.vkey" ]; then
+  echo "Error: Stake verification key not found: $keys_dir/stake.vkey"
+  exit 1
+fi
+
+for i in 1 2 3; do
+  if [ ! -f "$keys_dir/multi-sig/$i.skey" ]; then
+    echo "Error: Multi-sig signing key $i not found: $keys_dir/multi-sig/$i.skey"
+    exit 1
+  fi
+  if [ ! -f "$keys_dir/multi-sig/$i.keyhash" ]; then
+    echo "Error: Multi-sig keyhash $i not found: $keys_dir/multi-sig/$i.keyhash"
+    exit 1
+  fi
+done
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -28,7 +69,21 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Building, signing and submitting an info governance action
@@ -36,57 +91,80 @@ echo "Creating and submitting info governance action, using the multi-sig's ada.
 
 container_cli conway governance action create-info \
   --testnet \
-  --governance-action-deposit $(container_cli conway query gov-state | jq -r '.currentPParams.govActionDeposit') \
-  --deposit-return-stake-verification-key-file $keys_dir/stake.vkey \
+  --governance-action-deposit "$(container_cli conway query gov-state | jq -r '.currentPParams.govActionDeposit')" \
+  --deposit-return-stake-verification-key-file "$keys_dir/stake.vkey" \
   --anchor-url "$METADATA_URL" \
   --anchor-data-hash "$METADATA_HASH" \
   --out-file "$tx_cert_path"
 
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
+
 echo "Building transaction"
 
+script_addr=$(cat "$keys_dir/multi-sig/script.addr")
+payment_addr=$(cat "$keys_dir/payment.addr")
+script_utxo=$(get_utxo "$script_addr")
+payment_utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
- --tx-in "$(container_cli conway query utxo --address "$(cat $keys_dir/multi-sig/script.addr)" --out-file /dev/stdout | jq -r 'keys[0]')" \
- --tx-in-script-file $keys_dir/multi-sig/script.json \
- --tx-in "$(container_cli conway query utxo --address "$(cat $keys_dir/payment.addr)" --out-file /dev/stdout | jq -r 'keys[0]')" \
- --change-address "$(cat $keys_dir/payment.addr)" \
+ --tx-in "$script_utxo" \
+ --tx-in-script-file "$keys_dir/multi-sig/script.json" \
+ --tx-in "$payment_utxo" \
+ --change-address "$payment_addr" \
  --proposal-file "$tx_cert_path" \
- --required-signer-hash "$(cat $keys_dir/multi-sig/1.keyhash)" \
- --required-signer-hash "$(cat $keys_dir/multi-sig/2.keyhash)" \
- --required-signer-hash "$(cat $keys_dir/multi-sig/3.keyhash)" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/1.keyhash")" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/2.keyhash")" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/3.keyhash")" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 # Create multisig witnesses
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/1.skey \
+  --signing-key-file "$keys_dir/multi-sig/1.skey" \
   --out-file "$tx_path_stub-1.witness"
 
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/2.skey \
+  --signing-key-file "$keys_dir/multi-sig/2.skey" \
   --out-file "$tx_path_stub-2.witness"
 
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/3.skey \
+  --signing-key-file "$keys_dir/multi-sig/3.skey" \
   --out-file "$tx_path_stub-3.witness"
 
 # Create witness
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_path_stub-payment.witness"
 
 # Assemble Transaction
 container_cli conway transaction assemble \
   --tx-body-file "$tx_unsigned_path" \
   --witness-file "$tx_path_stub-payment.witness" \
+  --witness-file "$tx_path_stub-1.witness" \
   --witness-file "$tx_path_stub-2.witness" \
   --witness-file "$tx_path_stub-3.witness" \
-  --witness-file "$tx_path_stub-3.witness" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/multi-sig/create-param-action.sh b/scripts/multi-sig/create-param-action.sh
index 847ee4b..3d6dcfe 100755
--- a/scripts/multi-sig/create-param-action.sh
+++ b/scripts/multi-sig/create-param-action.sh
@@ -1,20 +1,61 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 METADATA_URL="https://buy-ryan-an-island.com"
 METADATA_HASH="0000000000000000000000000000000000000000000000000000000000000000"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/multi-sig"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/multi-sig"
 tx_path_stub="$txs_dir/param-change-action"
 tx_cert_path="$tx_path_stub.action"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/multi-sig/script.addr" ]; then
+  echo "Error: Multi-sig script address not found: $keys_dir/multi-sig/script.addr"
+  echo "Please run scripts/multi-sig/generate-keys-and-script.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/multi-sig/script.json" ]; then
+  echo "Error: Multi-sig script JSON not found: $keys_dir/multi-sig/script.json"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.vkey" ]; then
+  echo "Error: Stake verification key not found: $keys_dir/stake.vkey"
+  exit 1
+fi
+
+for i in 1 2 3; do
+  if [ ! -f "$keys_dir/multi-sig/$i.skey" ]; then
+    echo "Error: Multi-sig signing key $i not found: $keys_dir/multi-sig/$i.skey"
+    exit 1
+  fi
+  if [ ! -f "$keys_dir/multi-sig/$i.keyhash" ]; then
+    echo "Error: Multi-sig keyhash $i not found: $keys_dir/multi-sig/$i.keyhash"
+    exit 1
+  fi
+done
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -26,97 +67,131 @@ fi
 
 echo "Using running container: $container_name"
 
+# Extract network from container name (format: node-network-version-container)
+network=$(echo "$container_name" | cut -d'-' -f2)
+
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 echo "\nPull the latest guardrails script."
-curl --silent -J -L https://book.world.dev.cardano.org/environments/mainnet/guardrails-script.plutus -o $txs_dir/guardrails-script.plutus
+# Use network-specific URL (mainnet uses world.dev, testnets use play.dev)
+if [ "$network" = "mainnet" ]; then
+  guardrails_url="https://book.world.dev.cardano.org/environments/mainnet/guardrails-script.plutus"
+else
+  guardrails_url="https://book.play.dev.cardano.org/environments/$network/guardrails-script.plutus"
+fi
+curl --silent -J -L "$guardrails_url" -o "$txs_dir/guardrails-script.plutus"
+
+# Check guardrails script was downloaded
+if [ ! -f "$txs_dir/guardrails-script.plutus" ]; then
+  echo "Error: Failed to download guardrails script"
+  exit 1
+fi
 
 echo "\nGet the guardrails script hash from the genesis file."
-SCRIPT_HASH=$(container_cli hash script --script-file $txs_dir/guardrails-script.plutus)
+SCRIPT_HASH=$(container_cli hash script --script-file "$txs_dir/guardrails-script.plutus")
 echo "Script hash: $SCRIPT_HASH"
 
 # Building, signing and submitting an parameter update governance action
 echo "Creating and submitting protocol param update governance action, using the multi-sig's ada."
 
-# Get the script's directory
-script_dir=$(dirname "$0")
-
-# Get the container name from the get-container script
-container_name="$("$script_dir/../helper/get-container.sh")"
-
-if [ -z "$container_name" ]; then
-  echo "Failed to determine a running container."
-  exit 1
-fi
-
-echo "Using running container: $container_name"
-
-# Function to execute cardano-cli commands inside the container
-container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
-}
-
 container_cli conway governance action create-protocol-parameters-update \
   --testnet \
-  --governance-action-deposit $(container_cli conway query gov-state | jq -r '.currentPParams.govActionDeposit') \
-  --deposit-return-stake-verification-key-file $keys_dir/stake.vkey \
+  --governance-action-deposit "$(container_cli conway query gov-state | jq -r '.currentPParams.govActionDeposit')" \
+  --deposit-return-stake-verification-key-file "$keys_dir/stake.vkey" \
   --anchor-url "$METADATA_URL" \
   --anchor-data-hash "$METADATA_HASH" \
   --constitution-script-hash "$SCRIPT_HASH" \
   --key-reg-deposit-amt 3000000 \
   --out-file "$tx_cert_path"
 
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
+
 echo "Building transaction"
 
+script_addr=$(cat "$keys_dir/multi-sig/script.addr")
+payment_addr=$(cat "$keys_dir/payment.addr")
+script_utxo=$(get_utxo "$script_addr")
+payment_utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
- --tx-in "$(container_cli conway query utxo --address "$(cat $keys_dir/multi-sig/script.addr)" --out-file /dev/stdout | jq -r 'keys[0]')" \
- --tx-in-script-file $keys_dir/multi-sig/script.json \
- --tx-in "$(container_cli conway query utxo --address "$(cat $keys_dir/payment.addr)" --out-file /dev/stdout | jq -r 'keys[0]')" \
- --tx-in-collateral "$(container_cli conway query utxo --address "$(cat $keys_dir/payment.addr)" --out-file /dev/stdout | jq -r 'keys[0]')" \
- --change-address "$(cat $keys_dir/payment.addr)" \
+ --tx-in "$script_utxo" \
+ --tx-in-script-file "$keys_dir/multi-sig/script.json" \
+ --tx-in "$payment_utxo" \
+ --tx-in-collateral "$payment_utxo" \
+ --change-address "$payment_addr" \
  --proposal-file "$tx_cert_path" \
- --proposal-script-file $txs_dir/guardrails-script.plutus \
+ --proposal-script-file "$txs_dir/guardrails-script.plutus" \
  --proposal-redeemer-value {} \
- --required-signer-hash "$(cat $keys_dir/multi-sig/1.keyhash)" \
- --required-signer-hash "$(cat $keys_dir/multi-sig/2.keyhash)" \
- --required-signer-hash "$(cat $keys_dir/multi-sig/3.keyhash)" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/1.keyhash")" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/2.keyhash")" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/3.keyhash")" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 # Create multisig witnesses
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/1.skey \
+  --signing-key-file "$keys_dir/multi-sig/1.skey" \
   --out-file "$tx_path_stub-1.witness"
 
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/2.skey \
+  --signing-key-file "$keys_dir/multi-sig/2.skey" \
   --out-file "$tx_path_stub-2.witness"
 
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/3.skey \
+  --signing-key-file "$keys_dir/multi-sig/3.skey" \
   --out-file "$tx_path_stub-3.witness"
 
 # Create witness
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_path_stub-payment.witness"
 
 # Assemble Transaction
 container_cli conway transaction assemble \
   --tx-body-file "$tx_unsigned_path" \
   --witness-file "$tx_path_stub-payment.witness" \
+  --witness-file "$tx_path_stub-1.witness" \
   --witness-file "$tx_path_stub-2.witness" \
   --witness-file "$tx_path_stub-3.witness" \
-  --witness-file "$tx_path_stub-3.witness" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/multi-sig/drep-metadata.sh b/scripts/multi-sig/drep-metadata.sh
index d4ad862..d0674d1 100755
--- a/scripts/multi-sig/drep-metadata.sh
+++ b/scripts/multi-sig/drep-metadata.sh
@@ -1,15 +1,54 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/multi-sig"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/multi-sig"
 tx_path_stub="$txs_dir/one-sig-drep-vote"
 tx_cert_path="$tx_path_stub-update.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/multi-sig/1.skey" ]; then
+  echo "Error: Multi-sig signing key 1 not found: $keys_dir/multi-sig/1.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/multi-sig/1.keyhash" ]; then
+  echo "Error: Multi-sig keyhash 1 not found: $keys_dir/multi-sig/1.keyhash"
+  exit 1
+fi
+
+if [ ! -f "$txs_dir/drep-one-sig.id" ]; then
+  echo "Error: DRep script ID not found: $txs_dir/drep-one-sig.id"
+  exit 1
+fi
+
+if [ ! -f "$txs_dir/drep-one-sig.json" ]; then
+  echo "Error: DRep script JSON not found: $txs_dir/drep-one-sig.json"
+  exit 1
+fi
+
+if [ ! -f "$txs_dir/metadata.json" ]; then
+  echo "Error: Metadata file not found: $txs_dir/metadata.json"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,37 +62,65 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 echo "Building DRep Update Certificate"
 
 container_cli conway governance drep update-certificate \
- --drep-script-hash $(cat $txs_dir/drep-one-sig.id) \
- --out-file $tx_cert_path
+ --drep-script-hash "$(cat "$txs_dir/drep-one-sig.id")" \
+ --out-file "$tx_cert_path"
+
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
 
 container_cli conway transaction build \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
- --required-signer-hash "$(cat $keys_dir/multi-sig/1.keyhash)" \
- --certificate-file $tx_cert_path \
- --certificate-script-file $txs_dir/drep-one-sig.json \
- --metadata-json-file $txs_dir/metadata.json \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/1.keyhash")" \
+ --certificate-file "$tx_cert_path" \
+ --certificate-script-file "$txs_dir/drep-one-sig.json" \
+ --metadata-json-file "$txs_dir/metadata.json" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 # Create multisig witnesses
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/1.skey \
+  --signing-key-file "$keys_dir/multi-sig/1.skey" \
   --out-file "$tx_path_stub-1.witness"
 
 # Create witness
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_path_stub-payment.witness"
 
 # Assemble Transaction
@@ -63,7 +130,13 @@ container_cli conway transaction assemble \
   --witness-file "$tx_path_stub-1.witness" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/multi-sig/generate-keys-and-script.sh b/scripts/multi-sig/generate-keys-and-script.sh
index 45a33dc..2eacbc8 100755
--- a/scripts/multi-sig/generate-keys-and-script.sh
+++ b/scripts/multi-sig/generate-keys-and-script.sh
@@ -1,10 +1,19 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directories
-keys_dir="./keys"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+scripts_dir="$project_root/scripts"
+
+# Check required template file exists
+if [ ! -f "$scripts_dir/multi-sig/multi-sig-template.json" ]; then
+  echo "Error: Multi-sig template file not found: $scripts_dir/multi-sig/multi-sig-template.json"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -18,55 +27,55 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
 echo "Creating three keys to control a multi-sig script."
 
 # Create directory for keys
-mkdir -p $keys_dir/multi-sig
+mkdir -p "$keys_dir/multi-sig"
 
 # Key 1
 container_cli address key-gen \
- --verification-key-file keys/multi-sig/1.vkey \
- --signing-key-file keys/multi-sig/1.skey
+ --verification-key-file "$keys_dir/multi-sig/1.vkey" \
+ --signing-key-file "$keys_dir/multi-sig/1.skey"
 
 container_cli address key-hash \
-  --payment-verification-key-file keys/multi-sig/1.vkey > keys/multi-sig/1.keyhash
+  --payment-verification-key-file "$keys_dir/multi-sig/1.vkey" > "$keys_dir/multi-sig/1.keyhash"
 
 # Key 2
 container_cli address key-gen \
- --verification-key-file keys/multi-sig/2.vkey \
- --signing-key-file keys/multi-sig/2.skey
+ --verification-key-file "$keys_dir/multi-sig/2.vkey" \
+ --signing-key-file "$keys_dir/multi-sig/2.skey"
 
 container_cli address key-hash \
-  --payment-verification-key-file keys/multi-sig/2.vkey > keys/multi-sig/2.keyhash
+  --payment-verification-key-file "$keys_dir/multi-sig/2.vkey" > "$keys_dir/multi-sig/2.keyhash"
 
 # Key 3
 container_cli address key-gen \
- --verification-key-file keys/multi-sig/3.vkey \
- --signing-key-file keys/multi-sig/3.skey
+ --verification-key-file "$keys_dir/multi-sig/3.vkey" \
+ --signing-key-file "$keys_dir/multi-sig/3.skey"
 
 container_cli address key-hash \
-  --payment-verification-key-file keys/multi-sig/3.vkey > keys/multi-sig/3.keyhash
+  --payment-verification-key-file "$keys_dir/multi-sig/3.vkey" > "$keys_dir/multi-sig/3.keyhash"
 
 echo "Copying the script template."
 
-cp ./scripts/multi-sig/multi-sig-template.json $keys_dir/multi-sig/script.json
+cp "$scripts_dir/multi-sig/multi-sig-template.json" "$keys_dir/multi-sig/script.json"
 
 echo "Adding keys to script."
 
 # Remove \r from the key hashes when reading them
-jq --arg kh1 "$(tr -d '\r' < $keys_dir/multi-sig/1.keyhash)" \
-   --arg kh2 "$(tr -d '\r' < $keys_dir/multi-sig/2.keyhash)" \
-   --arg kh3 "$(tr -d '\r' < $keys_dir/multi-sig/3.keyhash)" \
+jq --arg kh1 "$(tr -d '\r' < "$keys_dir/multi-sig/1.keyhash")" \
+   --arg kh2 "$(tr -d '\r' < "$keys_dir/multi-sig/2.keyhash")" \
+   --arg kh3 "$(tr -d '\r' < "$keys_dir/multi-sig/3.keyhash")" \
 '.scripts[0].keyHash = $kh1 | .scripts[1].keyHash = $kh2 | .scripts[2].keyHash = $kh3' \
 "$keys_dir/multi-sig/script.json" > temp.json && mv temp.json "$keys_dir/multi-sig/script.json"
 
 echo "Creating script address."
 
-cardano-cli address build \
-  --payment-script-file $keys_dir/multi-sig/script.json \
-  --out-file $keys_dir/multi-sig/script.addr
+container_cli address build \
+  --payment-script-file "$keys_dir/multi-sig/script.json" \
+  --out-file "$keys_dir/multi-sig/script.addr"
 
 echo "Done!"
\ No newline at end of file
diff --git a/scripts/multi-sig/query-multisig.sh b/scripts/multi-sig/query-multisig.sh
index 2b870a1..b42e6e3 100755
--- a/scripts/multi-sig/query-multisig.sh
+++ b/scripts/multi-sig/query-multisig.sh
@@ -1,10 +1,19 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directories
-keys_dir="./keys"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+
+# Check required files exist
+if [ ! -f "$keys_dir/multi-sig/script.addr" ]; then
+  echo "Error: Multi-sig script address not found: $keys_dir/multi-sig/script.addr"
+  echo "Please run scripts/multi-sig/generate-keys-and-script.sh first"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -18,12 +27,13 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
-echo "Querying UTXOs for your multisig script address: $(cat $keys_dir/multi-sig/script.addr)"
+script_addr=$(cat "$keys_dir/multi-sig/script.addr")
+echo "Querying UTXOs for your multisig script address: $script_addr"
 
 # Query the UTxOs controlled by multisig script address
 container_cli conway query utxo \
-  --address "$(cat $keys_dir/multi-sig/script.addr)" \
-  --out-file  /dev/stdout
\ No newline at end of file
+  --address "$script_addr" \
+  --out-file /dev/stdout
\ No newline at end of file
diff --git a/scripts/multi-sig/send-ada-from-script.sh b/scripts/multi-sig/send-ada-from-script.sh
index 27deb38..de884fa 100755
--- a/scripts/multi-sig/send-ada-from-script.sh
+++ b/scripts/multi-sig/send-ada-from-script.sh
@@ -1,18 +1,54 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 LOVELACE_AMOUNT=1000000
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/multi-sig"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/multi-sig"
 tx_path_stub="$txs_dir/send-ada-from-script"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/multi-sig/script.addr" ]; then
+  echo "Error: Multi-sig script address not found: $keys_dir/multi-sig/script.addr"
+  echo "Please run scripts/multi-sig/generate-keys-and-script.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/multi-sig/script.json" ]; then
+  echo "Error: Multi-sig script JSON not found: $keys_dir/multi-sig/script.json"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+for i in 1 2 3; do
+  if [ ! -f "$keys_dir/multi-sig/$i.skey" ]; then
+    echo "Error: Multi-sig signing key $i not found: $keys_dir/multi-sig/$i.skey"
+    exit 1
+  fi
+  if [ ! -f "$keys_dir/multi-sig/$i.keyhash" ]; then
+    echo "Error: Multi-sig keyhash $i not found: $keys_dir/multi-sig/$i.keyhash"
+    exit 1
+  fi
+done
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -26,7 +62,21 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Send ada to the multisig payment script
@@ -34,48 +84,64 @@ echo "Sending $LOVELACE_AMOUNT lovelace to the payment address from the script."
 
 echo "Building transaction"
 
+script_addr=$(cat "$keys_dir/multi-sig/script.addr")
+payment_addr=$(cat "$keys_dir/payment.addr")
+script_utxo=$(get_utxo "$script_addr")
+
 container_cli conway transaction build \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/multi-sig/script.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --tx-in-script-file $keys_dir/multi-sig/script.json \
- --tx-out $(cat $keys_dir/payment.addr)+$LOVELACE_AMOUNT \
- --change-address $(cat $keys_dir/multi-sig/script.addr) \
- --required-signer-hash "$(cat $keys_dir/multi-sig/1.keyhash)" \
- --required-signer-hash "$(cat $keys_dir/multi-sig/2.keyhash)" \
- --required-signer-hash "$(cat $keys_dir/multi-sig/3.keyhash)" \
- --out-file "$txs_unsigned_path"
+ --tx-in "$script_utxo" \
+ --tx-in-script-file "$keys_dir/multi-sig/script.json" \
+ --tx-out "$payment_addr+$LOVELACE_AMOUNT" \
+ --change-address "$script_addr" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/1.keyhash")" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/2.keyhash")" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/3.keyhash")" \
+ --out-file "$tx_unsigned_path"
+
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
 
 # Create multisig witnesses
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/1.skey \
+  --signing-key-file "$keys_dir/multi-sig/1.skey" \
   --out-file "$tx_path_stub-1.witness"
 
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/2.skey \
+  --signing-key-file "$keys_dir/multi-sig/2.skey" \
   --out-file "$tx_path_stub-2.witness"
 
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/3.skey \
+  --signing-key-file "$keys_dir/multi-sig/3.skey" \
   --out-file "$tx_path_stub-3.witness"
 
 # Create witness
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_path_stub-payment.witness"
 
 # Assemble Transaction
 container_cli conway transaction assemble \
   --tx-body-file "$tx_unsigned_path" \
   --witness-file "$tx_path_stub-payment.witness" \
+  --witness-file "$tx_path_stub-1.witness" \
   --witness-file "$tx_path_stub-2.witness" \
   --witness-file "$tx_path_stub-3.witness" \
-  --witness-file "$tx_path_stub-3.witness" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/multi-sig/send-ada-to-script.sh b/scripts/multi-sig/send-ada-to-script.sh
index d2851a0..4966eb0 100755
--- a/scripts/multi-sig/send-ada-to-script.sh
+++ b/scripts/multi-sig/send-ada-to-script.sh
@@ -1,18 +1,38 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 LOVELACE_AMOUNT=10000000
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/multi-sig"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/multi-sig"
 tx_path_stub="$txs_dir/send-ada-to-script"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/multi-sig/script.addr" ]; then
+  echo "Error: Multi-sig script address not found: $keys_dir/multi-sig/script.addr"
+  echo "Please run scripts/multi-sig/generate-keys-and-script.sh first"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -26,7 +46,21 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Send ada to the multisig payment script
@@ -34,18 +68,34 @@ echo "Sending $LOVELACE_AMOUNT lovelace to the multisig payment address."
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+script_addr=$(cat "$keys_dir/multi-sig/script.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --tx-out $(cat $keys_dir/multi-sig/script.addr)+$LOVELACE_AMOUNT \
- --change-address $(cat $keys_dir/payment.addr) \
+ --tx-in "$utxo" \
+ --tx-out "$script_addr+$LOVELACE_AMOUNT" \
+ --change-address "$payment_addr" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 container_cli conway transaction sign \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/multi-sig/stake-multisig.sh b/scripts/multi-sig/stake-multisig.sh
index 911959f..8e8ce14 100755
--- a/scripts/multi-sig/stake-multisig.sh
+++ b/scripts/multi-sig/stake-multisig.sh
@@ -1,15 +1,44 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/multi-sig"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/multi-sig"
 tx_path_stub="$txs_dir/stake-reg"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/multi-sig/1.skey" ]; then
+  echo "Error: Multi-sig signing key 1 not found: $keys_dir/multi-sig/1.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/multi-sig/1.keyhash" ]; then
+  echo "Error: Multi-sig keyhash 1 not found: $keys_dir/multi-sig/1.keyhash"
+  exit 1
+fi
+
+if [ ! -f "$txs_dir/drep-one-sig.json" ]; then
+  echo "Error: DRep script JSON not found: $txs_dir/drep-one-sig.json"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,36 +52,65 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 echo "Registering your multi-sig as a stake credential."
 
 container_cli conway stake-address registration-certificate \
- --stake-script-file $txs_dir/drep-one-sig.json \
- --key-reg-deposit-amt "$(container_cli conway query gov-state | jq -r .currentPParams.stakeAddressDeposit)" \
+ --stake-script-file "$txs_dir/drep-one-sig.json" \
+ --key-reg-deposit-amt "$(container_cli conway query gov-state | jq -r '.currentPParams.stakeAddressDeposit')" \
  --out-file "$tx_cert_path"
 
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
+
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
- --required-signer-hash "$(cat $keys_dir/multi-sig/1.keyhash)" \
- --certificate-file $tx_cert_path \
- --certificate-script-file $txs_dir/drep-one-sig.json \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
+ --required-signer-hash "$(cat "$keys_dir/multi-sig/1.keyhash")" \
+ --certificate-file "$tx_cert_path" \
+ --certificate-script-file "$txs_dir/drep-one-sig.json" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 # Create multisig witnesses
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/multi-sig/1.skey \
+  --signing-key-file "$keys_dir/multi-sig/1.skey" \
   --out-file "$tx_path_stub-1.witness"
 
 # Create witness
 container_cli conway transaction witness \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_path_stub-payment.witness"
 
 # Assemble Transaction
@@ -62,7 +120,13 @@ container_cli conway transaction assemble \
   --witness-file "$tx_path_stub-1.witness" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/query/dump-node-state.sh b/scripts/query/dump-node-state.sh
index ee2789e..a783f82 100755
--- a/scripts/query/dump-node-state.sh
+++ b/scripts/query/dump-node-state.sh
@@ -1,7 +1,12 @@
 #!/bin/bash
+set -euo pipefail
 
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/.." && pwd)
+
+# Define directory paths relative to project root
+dumps_dir="$project_root/dumps"
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -15,55 +20,58 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
-# Get the network name
+# Get the network name
 
 # Split the container name and extract the second part
-network=$(echo $container_name | cut -d'-' -f2)
+network=$(echo "$container_name" | cut -d'-' -f2)
+
+# Create dumps directory if it doesn't exist
+mkdir -p "$dumps_dir/$network"
 
 # Dumping out CC state
 echo "Dumping constitutional committee state."
 
-container_cli conway query committee-state > ./dumps/$network/committee.json
+container_cli conway query committee-state > "$dumps_dir/$network/committee.json"
 
 # Dumping out constitution state
 echo "Dumping constitution state."
 
-container_cli conway query constitution > ./dumps/$network/constitution.json
+container_cli conway query constitution > "$dumps_dir/$network/constitution.json"
 
 # Query DReps from ledger state
 echo "Dumping DReps from ledger state."
 
 container_cli conway query drep-state \
-  --all-dreps > ./dumps/$network/dreps-info.json
+  --all-dreps > "$dumps_dir/$network/dreps-info.json"
 
 container_cli conway query drep-stake-distribution \
-  --all-dreps > ./dumps/$network/dreps-power.json
+  --all-dreps > "$dumps_dir/$network/dreps-power.json"
 
 # Dumping governance ledger state
 echo "Dumping whole governance state from ledger state."
 
-container_cli conway query gov-state > ./dumps/$network/gov-state.json
+container_cli conway query gov-state > "$dumps_dir/$network/gov-state.json"
 
 # Dumping proposals stored in ledger state
 echo "Dumping governance actions from ledger state."
 
-container_cli conway query gov-state | jq -r '.proposals' > ./dumps/$network/governance-actions.json
+container_cli conway query gov-state | jq -r '.proposals' > "$dumps_dir/$network/governance-actions.json"
 
 # Dumping out parameters state
 echo "Dumping protocol parameters state."
 
-container_cli conway query protocol-parameters > ./dumps/$network/params.json
+container_cli conway query protocol-parameters > "$dumps_dir/$network/params.json"
 
 # Dumping out SPO state
 echo "Dumping SPO stake distribution state."
 
 container_cli conway query spo-stake-distribution \
- --all-spos > ./dumps/$network/spo-stake.json
+ --all-spos > "$dumps_dir/$network/spo-stake.json"
 
 # Dumping out SPO state
 echo "Dumping treasury state."
 
-container_cli conway query treasury > ./dumps/$network/treasury.json
\ No newline at end of file
+container_cli conway query treasury > "$dumps_dir/$network/treasury.json"
\ No newline at end of file
diff --git a/scripts/query/own-utxos.sh b/scripts/query/own-utxos.sh
index c99a9fe..1c9bb36 100755
--- a/scripts/query/own-utxos.sh
+++ b/scripts/query/own-utxos.sh
@@ -1,10 +1,19 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directories
-keys_dir="./keys"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+
+# Check if you have a address created
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Please generate some keys and addresses before querying funds."
+  echo "Exiting."
+  exit 0
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -18,19 +27,13 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
-# Check if you have a address created
-if [ ! -f "$keys_dir/payment.addr" ]; then
-  echo "Please generate some keys and addresses before querying funds."
-  echo "Exiting."
-  exit 0
-fi
-
-echo "Querying UTXOs for your address: $(cat $keys_dir/payment.addr)"
+payment_addr=$(cat "$keys_dir/payment.addr")
+echo "Querying UTXOs for your address: $payment_addr"
 
 # Query the UTxOs controlled by the payment address
 container_cli conway query utxo \
-  --address "$(cat $keys_dir/payment.addr)" \
-  --out-file  /dev/stdout
\ No newline at end of file
+  --address "$payment_addr" \
+  --out-file /dev/stdout
\ No newline at end of file
diff --git a/scripts/query/stake-info.sh b/scripts/query/stake-info.sh
index 350858e..36f93e0 100755
--- a/scripts/query/stake-info.sh
+++ b/scripts/query/stake-info.sh
@@ -1,10 +1,25 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directories
-keys_dir="./keys"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+
+# Check if you have a address created
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Please generate some keys and addresses before querying funds."
+  echo "Exiting."
+  exit 0
+fi
+
+if [ ! -f "$keys_dir/stake.addr" ]; then
+  echo "Error: Stake address file not found: $keys_dir/stake.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -18,18 +33,12 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
-# Check if you have a address created
-if [ ! -f "$keys_dir/payment.addr" ]; then
-  echo "Please generate some keys and addresses before querying funds."
-  echo "Exiting."
-  exit 0
-fi
-
-echo "Querying Stake Account info for your address: $(cat $keys_dir/stake.addr)"
+stake_addr=$(cat "$keys_dir/stake.addr")
+echo "Querying Stake Account info for your address: $stake_addr"
 
 container_cli conway query stake-address-info \
-  --address "$(cat $keys_dir/stake.addr)" \
-  --out-file  /dev/stdout
+  --address "$stake_addr" \
+  --out-file /dev/stdout
diff --git a/scripts/query/stake-pools.sh b/scripts/query/stake-pools.sh
index 0608776..d56fb26 100755
--- a/scripts/query/stake-pools.sh
+++ b/scripts/query/stake-pools.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -euo pipefail
 
 # Get the script's directory
 script_dir=$(dirname "$0")
@@ -15,7 +16,7 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
 # Query the stake pools
diff --git a/scripts/query/tip.sh b/scripts/query/tip.sh
index 4e1ff2e..287a9f8 100755
--- a/scripts/query/tip.sh
+++ b/scripts/query/tip.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -euo pipefail
 
 # Get the script's directory
 script_dir=$(dirname "$0")
@@ -15,7 +16,7 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
 # Query the tip of the blockchain as observed by the node
diff --git a/scripts/query/utxos-for-address.sh b/scripts/query/utxos-for-address.sh
index 27516bc..04e0f56 100755
--- a/scripts/query/utxos-for-address.sh
+++ b/scripts/query/utxos-for-address.sh
@@ -1,15 +1,16 @@
 #!/bin/bash
-
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 ADDRESS="addr_test1wz0vzkrzked85ywpsq4ffmx2etvjtnk07lvldrp3d4ht86ckfg639"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directories
-keys_dir="./keys"
-
-# Get the script's directory
+# Get the script's directory and project root
 script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,7 +24,7 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
 }
 
 echo "Querying UTXOs for address: $ADDRESS"
@@ -31,4 +32,4 @@ echo "Querying UTXOs for address: $ADDRESS"
 # Query the UTxOs controlled by the payment address
 container_cli conway query utxo \
   --address "$ADDRESS" \
-  --out-file  /dev/stdout
\ No newline at end of file
+  --out-file /dev/stdout
\ No newline at end of file
diff --git a/scripts/simple/metadata-tx.sh b/scripts/simple/metadata-tx.sh
index 0c3e29e..97b17b8 100755
--- a/scripts/simple/metadata-tx.sh
+++ b/scripts/simple/metadata-tx.sh
@@ -1,18 +1,37 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/simple"
 tx_path_stub="$txs_dir/metadata-transaction"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$txs_dir/metadata.json" ]; then
+  echo "Error: Metadata file not found: $txs_dir/metadata.json"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -26,23 +45,52 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
  --metadata-json-file "$txs_dir/metadata.json" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 container_cli conway transaction sign \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/simple/send-ada.sh b/scripts/simple/send-ada.sh
index 2ca1683..5eb11d9 100755
--- a/scripts/simple/send-ada.sh
+++ b/scripts/simple/send-ada.sh
@@ -1,19 +1,33 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 LOVELACE_AMOUNT=10000000
 ADDRESS="addr_test1wqft2yqkp8wj5k5k7dy9725kxkcd4ep4ycp5uczuqtt3vqcgh63dt"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/simple"
 tx_path_stub="$txs_dir/send-ada"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -27,26 +41,55 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Send ada to the multisig payment script
 echo "Sending $LOVELACE_AMOUNT lovelace to $ADDRESS."
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 echo "Building transaction"
 
 container_cli conway transaction build \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --tx-out "$ADDRESS"+$LOVELACE_AMOUNT \
- --change-address $(cat $keys_dir/payment.addr) \
+ --tx-in "$utxo" \
+ --tx-out "$ADDRESS+$LOVELACE_AMOUNT" \
+ --change-address "$payment_addr" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 container_cli conway transaction sign \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/simple/send-to-many.sh b/scripts/simple/send-to-many.sh
index 981ae0c..ee8d7f9 100755
--- a/scripts/simple/send-to-many.sh
+++ b/scripts/simple/send-to-many.sh
@@ -1,20 +1,34 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 LOVELACE_AMOUNT=1230000
-CSV_FILE="./keys/addresses-testnet.csv"
-METADATA_FILE="./keys/metadata-testnet.json"
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/simple/send-to-many"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/simple"
+CSV_FILE="$keys_dir/addresses-testnet.csv"
+METADATA_FILE="$keys_dir/metadata-testnet.json"
 tx_path_stub="$txs_dir/send-to-many"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -28,7 +42,21 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Check if CSV file exists
@@ -69,14 +97,8 @@ echo "Found ${#addresses[@]} addresses in CSV file"
 echo "Sending $LOVELACE_AMOUNT lovelace to each address"
 
 # Get UTXO from payment address
-payment_addr=$(cat $keys_dir/payment.addr)
-utxo_output=$(container_cli conway query utxo --address "$payment_addr" --out-file /dev/stdout)
-utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
-
-if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
-  echo "Error: No UTXO found at payment address"
-  exit 1
-fi
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
 
 echo "Using UTXO: $utxo"
 
@@ -113,18 +135,30 @@ build_args+=("--out-file" "$tx_unsigned_path")
 
 container_cli "${build_args[@]}"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 # Sign the transaction
 echo "Signing transaction"
 
 container_cli conway transaction sign \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
 
 echo "Transaction submitted successfully!"
 echo "Sent $LOVELACE_AMOUNT lovelace to ${#addresses[@]} addresses"
diff --git a/scripts/simple/treasury-donate.sh b/scripts/simple/treasury-donate.sh
index 33e1522..db40c77 100755
--- a/scripts/simple/treasury-donate.sh
+++ b/scripts/simple/treasury-donate.sh
@@ -1,18 +1,32 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 LOVELACE_AMOUNT=10000000
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/simple"
 tx_path_stub="$txs_dir/treasury-donate"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -26,7 +40,21 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Send ada to the multisig payment script
@@ -34,18 +62,33 @@ echo "Sending $LOVELACE_AMOUNT lovelace to the treasury."
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
- --treasury-donation $LOVELACE_AMOUNT \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
+ --treasury-donation "$LOVELACE_AMOUNT" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 container_cli conway transaction sign \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/stake/delegate-to-drep.sh b/scripts/stake/delegate-to-drep.sh
index 96dbca4..d507da2 100755
--- a/scripts/stake/delegate-to-drep.sh
+++ b/scripts/stake/delegate-to-drep.sh
@@ -1,19 +1,43 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 drep_id="3f3d4a84b800b34eb84c6151a955cdd823a0b99e3b886c725b8769e5" # keyhash of the drep
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/stake"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/stake"
 tx_path_stub="$txs_dir/vote-deleg"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.vkey" ]; then
+  echo "Error: Stake verification key not found: $keys_dir/stake.vkey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.skey" ]; then
+  echo "Error: Stake signing key not found: $keys_dir/stake.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -27,35 +51,70 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Delegating to an DRep
 echo "Delegating you to DRep: $drep_id."
 
 container_cli conway stake-address vote-delegation-certificate \
- --stake-verification-key-file $keys_dir/stake.vkey \
+ --stake-verification-key-file "$keys_dir/stake.vkey" \
  --drep-key-hash "$drep_id" \
  --out-file "$tx_cert_path"
 
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
+
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
  --witness-override 2 \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
  --certificate-file "$tx_cert_path" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 echo "Signing transaction"
 
 container_cli conway transaction sign \
  --tx-body-file "$tx_unsigned_path" \
- --signing-key-file $keys_dir/payment.skey \
- --signing-key-file $keys_dir/stake.skey \
+ --signing-key-file "$keys_dir/payment.skey" \
+ --signing-key-file "$keys_dir/stake.skey" \
  --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/stake/delegate-to-spo.sh b/scripts/stake/delegate-to-spo.sh
index b72cece..f0067ea 100755
--- a/scripts/stake/delegate-to-spo.sh
+++ b/scripts/stake/delegate-to-spo.sh
@@ -1,19 +1,43 @@
 #!/bin/bash
+set -euo pipefail
 
 # ~~~~~~~~~~~~ CHANGE THIS ~~~~~~~~~~~~
 spo_id="pool104flte3y29dprxcntacsuyznhduvlaza38gvp8yyhy2vvmfenxa" # keyhash of the SPO
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/stake"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/stake"
 tx_path_stub="$txs_dir/stake-pool-deleg"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.vkey" ]; then
+  echo "Error: Stake verification key not found: $keys_dir/stake.vkey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.skey" ]; then
+  echo "Error: Stake signing key not found: $keys_dir/stake.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -27,31 +51,66 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Delegating to an SPO
 echo "Delegating you to SPO: $spo_id."
 
-container-cli conway stake-address stake-delegation-certificate \
- --stake-verification-key-file $keys_dir/stake.vkey \
+container_cli conway stake-address stake-delegation-certificate \
+ --stake-verification-key-file "$keys_dir/stake.vkey" \
  --stake-pool-id "$spo_id" \
  --out-file "$tx_cert_path"
 
-container-cli conway transaction build \
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
+
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
+container_cli conway transaction build \
  --witness-override 2 \
- --tx-in $(container-cli query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
  --certificate-file "$tx_cert_path" \
  --out-file "$tx_unsigned_path"
 
-container-cli conway transaction sign \
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
+container_cli conway transaction sign \
  --tx-body-file "$tx_unsigned_path" \
- --signing-key-file $keys_dir/payment.skey \
- --signing-key-file $keys_dir/stake.skey \
+ --signing-key-file "$keys_dir/payment.skey" \
+ --signing-key-file "$keys_dir/stake.skey" \
  --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/stake/key-deregister.sh b/scripts/stake/key-deregister.sh
index 4609d34..d54ea15 100755
--- a/scripts/stake/key-deregister.sh
+++ b/scripts/stake/key-deregister.sh
@@ -1,15 +1,39 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/stake"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/stake"
 tx_path_stub="$txs_dir/stake-deregistration"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.vkey" ]; then
+  echo "Error: Stake verification key not found: $keys_dir/stake.vkey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.skey" ]; then
+  echo "Error: Stake signing key not found: $keys_dir/stake.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,33 +47,68 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Unregistering your stake key
 echo "Deregistering your stake key."
 
 container_cli conway stake-address deregistration-certificate \
- --stake-verification-key-file $keys_dir/stake.vkey \
- --key-reg-deposit-amt $(container_cli conway query gov-state | jq -r .currentPParams.stakeAddressDeposit) \
+ --stake-verification-key-file "$keys_dir/stake.vkey" \
+ --key-reg-deposit-amt "$(container_cli conway query gov-state | jq -r '.currentPParams.stakeAddressDeposit')" \
  --out-file "$tx_cert_path"
 
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
+
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
  --witness-override 2 \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
  --certificate-file "$tx_cert_path" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 container_cli conway transaction sign \
  --tx-body-file "$tx_unsigned_path" \
- --signing-key-file $keys_dir/payment.skey \
- --signing-key-file $keys_dir/stake.skey \
+ --signing-key-file "$keys_dir/payment.skey" \
+ --signing-key-file "$keys_dir/stake.skey" \
  --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/stake/key-register.sh b/scripts/stake/key-register.sh
index bc808bd..2972ba1 100755
--- a/scripts/stake/key-register.sh
+++ b/scripts/stake/key-register.sh
@@ -1,15 +1,39 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/stake"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/stake"
 tx_path_stub="$txs_dir/stake-register"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.vkey" ]; then
+  echo "Error: Stake verification key not found: $keys_dir/stake.vkey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.skey" ]; then
+  echo "Error: Stake signing key not found: $keys_dir/stake.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,35 +47,71 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation (supports index selection)
+get_utxo() {
+  local address=$1
+  local index=${2:-0}
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r "keys[$index]")
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address (index $index)" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
 # Registering your stake key
 echo "Registering your stake key."
 
 container_cli conway stake-address registration-certificate \
- --stake-verification-key-file $keys_dir/stake.vkey \
- --key-reg-deposit-amt "$(container_cli conway query gov-state | jq -r .currentPParams.stakeAddressDeposit)" \
+ --stake-verification-key-file "$keys_dir/stake.vkey" \
+ --key-reg-deposit-amt "$(container_cli conway query gov-state | jq -r '.currentPParams.stakeAddressDeposit')" \
  --out-file "$tx_cert_path"
 
+# Check certificate file was created
+if [ ! -f "$tx_cert_path" ]; then
+  echo "Error: Failed to create certificate file"
+  exit 1
+fi
+
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+utxo=$(get_utxo "$payment_addr" 1)
+
 container_cli conway transaction build \
  --witness-override 2 \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[1]') \
- --change-address $(cat $keys_dir/payment.addr) \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
  --certificate-file "$tx_cert_path" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 echo "Signing transaction"
 
 container_cli conway transaction sign \
  --tx-body-file "$tx_unsigned_path" \
- --signing-key-file $keys_dir/payment.skey \
- --signing-key-file $keys_dir/stake.skey \
+ --signing-key-file "$keys_dir/payment.skey" \
+ --signing-key-file "$keys_dir/stake.skey" \
  --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/scripts/stake/withdraw-rewards.sh b/scripts/stake/withdraw-rewards.sh
index adf9449..aafade0 100755
--- a/scripts/stake/withdraw-rewards.sh
+++ b/scripts/stake/withdraw-rewards.sh
@@ -1,15 +1,40 @@
 #!/bin/bash
+set -euo pipefail
 
-# Define directory paths
-keys_dir="./keys"
-txs_dir="./txs/stake"
+# Get the script's directory and project root
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir/../.." && pwd)
+
+# Define directory paths relative to project root
+keys_dir="$project_root/keys"
+txs_dir="$project_root/txs/stake"
 tx_path_stub="$txs_dir/stake-withdraw"
 tx_cert_path="$tx_path_stub.cert"
 tx_unsigned_path="$tx_path_stub.unsigned"
 tx_signed_path="$tx_path_stub.signed"
 
-# Get the script's directory
-script_dir=$(dirname "$0")
+# Check required files exist
+if [ ! -f "$keys_dir/payment.addr" ]; then
+  echo "Error: Payment address file not found: $keys_dir/payment.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/payment.skey" ]; then
+  echo "Error: Payment signing key not found: $keys_dir/payment.skey"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.addr" ]; then
+  echo "Error: Stake address file not found: $keys_dir/stake.addr"
+  echo "Please run scripts/generate-keys.sh first"
+  exit 1
+fi
+
+if [ ! -f "$keys_dir/stake.skey" ]; then
+  echo "Error: Stake signing key not found: $keys_dir/stake.skey"
+  exit 1
+fi
 
 # Get the container name from the get-container script
 container_name="$("$script_dir/../helper/get-container.sh")"
@@ -23,31 +48,61 @@ echo "Using running container: $container_name"
 
 # Function to execute cardano-cli commands inside the container
 container_cli() {
-  docker exec -ti $container_name cardano-cli "$@"
+  docker exec -ti "$container_name" cardano-cli "$@"
+}
+
+# Helper function to get UTXO with validation
+get_utxo() {
+  local address=$1
+  local utxo_output
+  utxo_output=$(container_cli conway query utxo --address "$address" --out-file /dev/stdout)
+  local utxo
+  utxo=$(echo "$utxo_output" | jq -r 'keys[0]')
+  if [ -z "$utxo" ] || [ "$utxo" = "null" ]; then
+    echo "Error: No UTXO found at address: $address" >&2
+    exit 1
+  fi
+  echo "$utxo"
 }
 
-stake_account_balance=$(container_cli conway query stake-address-info --address $(cat $keys_dir/stake.addr) | jq -r '.[0].rewardAccountBalance') 
+stake_account_balance=$(container_cli conway query stake-address-info --address "$(cat "$keys_dir/stake.addr")" | jq -r '.[0].rewardAccountBalance') 
 
 # Send ada to the multisig payment script
 echo "Withdrawing all balance of $stake_account_balance from stake account."
 
 echo "Building transaction"
 
+payment_addr=$(cat "$keys_dir/payment.addr")
+stake_addr=$(cat "$keys_dir/stake.addr")
+utxo=$(get_utxo "$payment_addr")
+
 container_cli conway transaction build \
- --tx-in $(container_cli conway query utxo --address $(cat $keys_dir/payment.addr) --out-file  /dev/stdout | jq -r 'keys[0]') \
- --change-address $(cat $keys_dir/payment.addr) \
- --withdrawal $(cat $keys_dir/stake.addr)+$stake_account_balance \
+ --tx-in "$utxo" \
+ --change-address "$payment_addr" \
+ --withdrawal "$stake_addr+$stake_account_balance" \
  --out-file "$tx_unsigned_path"
 
+# Check transaction file was created
+if [ ! -f "$tx_unsigned_path" ]; then
+  echo "Error: Failed to create unsigned transaction file"
+  exit 1
+fi
+
 echo "Signing transaction"
 
 container_cli conway transaction sign \
   --tx-body-file "$tx_unsigned_path" \
-  --signing-key-file $keys_dir/payment.skey \
-  --signing-key-file $keys_dir/stake.skey \
+  --signing-key-file "$keys_dir/payment.skey" \
+  --signing-key-file "$keys_dir/stake.skey" \
   --out-file "$tx_signed_path"
 
+# Check signed transaction file was created
+if [ ! -f "$tx_signed_path" ]; then
+  echo "Error: Failed to create signed transaction file"
+  exit 1
+fi
+
 # Submit the transaction
 echo "Submitting transaction"
 
-container_cli conway transaction submit --tx-file $tx_signed_path
+container_cli conway transaction submit --tx-file "$tx_signed_path"
diff --git a/start-node.sh b/start-node.sh
index ea92270..373e94c 100755
--- a/start-node.sh
+++ b/start-node.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -euo pipefail
 
 # Define colors
 RED='\033[0;31m'
@@ -17,28 +18,83 @@ echo "   / / / _ \/ ___/ __/ __ \/ _ \/ ________/ / / / __ \/ ___/ //_/ _ \/ ___
 echo "  / / /  __(__  / /_/ / / /  __/ /_/_____/ /_/ / /_/ / /__/ ,< /  __/ /  /_____/ /|  / /_/ / /_/ /  __/ "
 echo " /_/  \___/____/\__/_/ /_/\___/\__/     /_____/\____/\___/_/|_|\___/_/        /_/ |_/\____/\__,_/\___/  "
 echo "                                                                                                        "                                                                                                 
-echo -e "${NC}"
-echo -e "${GREEN}Welcome to the Testnet Docker Node!${NC}"
-echo -e "${YELLOW}This script will help you set up and manage your Cardano testnet node(s).${NC}"
 echo
 
-# Define the list of available networks
-available_networks=("mainnet" "preprod" "preview" "sanchonet")
-
-# Prompt the user to select a network
-echo -e "${CYAN}Please select a network:${NC}"
-select network in "${available_networks[@]}"; do
-  if [ -n "$network" ]; then
-    echo -e "${GREEN}You have selected: $network${NC}"
-    break
+# Check and display running nodes
+show_running_nodes() {
+  local running_nodes
+  running_nodes=$(docker ps --format "{{.Names}}" | grep -E "^node-[^-]+-[^-]+-container$" || true)
+  
+  if [ -n "$running_nodes" ]; then
+    echo -e "${CYAN}Currently running Cardano node(s):${NC}"
+    echo "$running_nodes" | while read -r container; do
+      # Extract network and version from container name (node-network-version-container)
+      local network_version=$(echo "$container" | sed 's/node-\(.*\)-container/\1/')
+      echo -e "  ${GREEN}✓${NC} ${CYAN}$container${NC} (${YELLOW}$network_version${NC})"
+    done
+    echo ""
   else
-    echo -e "${RED}Invalid selection. Please try again.${NC}"
+    echo -e "${YELLOW}No Cardano nodes are currently running.${NC}"
+    echo ""
   fi
-done
+}
+
+# Display running nodes
+show_running_nodes
+
+# Define the list of available networks
+available_networks=("mainnet" "preprod" "preview" "sanchonet")
 
 # Define the list of available node versions
 available_versions=("10.5.1" "10.5.3" "10.6.1")
 
+# Initialize variables to avoid unbound variable errors
+network=""
+node_version=""
+
+# Check if running in non-interactive mode (e.g., CI/CD)
+if [ ! -t 0 ]; then
+  # Non-interactive mode: read from stdin
+  read -r network_choice || true
+  if [ -n "$network_choice" ] && [ "$network_choice" -ge 1 ] && [ "$network_choice" -le ${#available_networks[@]} ]; then
+    network="${available_networks[$((network_choice - 1))]}"
+    echo -e "${GREEN}Selected network: $network${NC}"
+  else
+    echo -e "${RED}Error: Invalid network selection: $network_choice${NC}"
+    exit 1
+  fi
+  
+  read -r version_choice || true
+  if [ -n "$version_choice" ] && [ "$version_choice" -ge 1 ] && [ "$version_choice" -le ${#available_versions[@]} ]; then
+    node_version="${available_versions[$((version_choice - 1))]}"
+    echo -e "${GREEN}Selected node version: $node_version${NC}"
+  else
+    echo -e "${RED}Error: Invalid version selection: $version_choice${NC}"
+    exit 1
+  fi
+else
+  # Interactive mode: use select
+  echo -e "${CYAN}Please select a network:${NC}"
+  select network in "${available_networks[@]}"; do
+    if [ -n "$network" ]; then
+      echo -e "${GREEN}You have selected: $network${NC}"
+      break
+    else
+      echo -e "${RED}Invalid selection. Please try again.${NC}"
+    fi
+  done
+  
+  echo -e "${CYAN}Please select a node version:${NC}"
+  select node_version in "${available_versions[@]}"; do
+    if [ -n "$node_version" ]; then
+      echo -e "${GREEN}You have selected: $node_version${NC}"
+      break
+    else
+      echo -e "${RED}Invalid selection. Please try again.${NC}"
+    fi
+  done
+fi
+
 # Function to assign a unique port based on version
 # This ensures different versions on the same network use different ports
 assign_port_for_version() {
@@ -56,23 +112,76 @@ assign_port_for_version() {
   echo $port
 }
 
-# Prompt the user to select a node version
-echo -e "${CYAN}Please select a node version:${NC}"
-select node_version in "${available_versions[@]}"; do
-  if [ -n "$node_version" ]; then
-    echo -e "${GREEN}You have selected: $node_version${NC}"
-    break
+# Validate that both network and node_version are set
+if [ -z "$network" ]; then
+  echo -e "${RED}Error: Network not selected${NC}"
+  exit 1
+fi
+
+if [ -z "$node_version" ]; then
+  echo -e "${RED}Error: Node version not selected${NC}"
+  exit 1
+fi
+
+# Check for running Cardano node containers
+check_running_nodes() {
+  local running_nodes
+  running_nodes=$(docker ps --format "{{.Names}}" | grep -E "^node-[^-]+-[^-]+-container$" || true)
+  
+  if [ -n "$running_nodes" ]; then
+    echo -e "${YELLOW}Warning: You have the following Cardano node(s) already running:${NC}"
+    echo "$running_nodes" | while read -r container; do
+      echo -e "  ${CYAN}- $container${NC}"
+    done
+    echo ""
   else
-    echo -e "${RED}Invalid selection. Please try again.${NC}"
+    echo -e "${GREEN}No Cardano nodes are currently running.${NC}"
+    echo ""
   fi
-done
+  
+  echo "$running_nodes"
+}
+
+# Check if the specific node is already running or exists
+check_duplicate_node() {
+  local target_container="node-$network-$node_version-container"
+  local is_running
+  local exists
+  
+  # Check if container is running
+  is_running=$(docker ps --format "{{.Names}}" | grep -E "^${target_container}$" || true)
+  
+  # Check if container exists (even if stopped)
+  exists=$(docker ps -a --format "{{.Names}}" | grep -E "^${target_container}$" || true)
+  
+  if [ -n "$is_running" ]; then
+    echo -e "${RED}Error: Node '$target_container' is already running!${NC}"
+    echo -e "${YELLOW}Please stop it first using: ./stop-nodes.sh${NC}"
+    echo -e "${YELLOW}Or use a different network/version combination.${NC}"
+    exit 1
+  elif [ -n "$exists" ]; then
+    echo -e "${YELLOW}Warning: Container '$target_container' exists but is not running.${NC}"
+    echo -e "${YELLOW}Removing existing container...${NC}"
+    docker rm -f "$target_container" 2>/dev/null || true
+  fi
+}
+
+# Check for running nodes and display them
+running_nodes=$(check_running_nodes)
+
+# Check if the specific node is already running
+check_duplicate_node
 
 # Assign a unique port for this version
 NODE_PORT=$(assign_port_for_version "$node_version")
 echo -e "${BLUE}Assigned port: $NODE_PORT${NC}"
 
+# Get the project root directory (where this script is located)
+script_dir=$(dirname "$0")
+project_root=$(cd "$script_dir" && pwd)
+
 # Set directory locations
-base_dir="$(pwd)"
+base_dir="$project_root"
 node_dir="$base_dir/node-$network-$node_version"
 config_dir="$node_dir/config"
 db_dir="$node_dir/db"
@@ -85,9 +194,14 @@ cc_dir="$tx_dir/cc"
 drep_dir="$tx_dir/drep"
 ga_dir="$tx_dir/ga"
 multi_sig_dir="$tx_dir/multi-sig"
+simple_dir="$tx_dir/simple"
+helper_dir="$tx_dir/helper"
 
 # Dumps dir
-dumps_dir="./dumps/$network"
+dumps_dir="$base_dir/dumps/$network"
+
+# Utilities dir
+utilities_dir="$base_dir/utilities"
 
 # Base URL for node config files
 if [ "$network" = "sanchonet" ]; then
@@ -126,8 +240,12 @@ create_dir "$cc_dir"
 create_dir "$drep_dir"
 create_dir "$ga_dir"
 create_dir "$multi_sig_dir"
+create_dir "$simple_dir"
+create_dir "$helper_dir"
 # Dumps dir
 create_dir "$dumps_dir"
+# Utilities dir
+create_dir "$utilities_dir"
 
 # List of JSON files to download
 config_files=(
@@ -162,7 +280,15 @@ export NETWORK_ID=$(jq -r '.networkMagic' "$config_dir/shelley-genesis.json")
 
 # Substitute the variables in the docker-compose.yml file and start the Docker container
 echo -e "${CYAN}Starting the Docker container...${NC}"
-envsubst < docker-compose.yml | docker-compose -f - up -d --build
+# Use docker compose (plugin) if available, fallback to docker-compose (standalone)
+if command -v docker >/dev/null 2>&1 && docker compose version >/dev/null 2>&1; then
+  envsubst < docker-compose.yml | docker compose -f - up -d --build
+elif command -v docker-compose >/dev/null 2>&1; then
+  envsubst < docker-compose.yml | docker-compose -f - up -d --build
+else
+  echo -e "${RED}Error: Neither 'docker compose' nor 'docker-compose' is available${NC}"
+  exit 1
+fi
 
 # Forward the logs to the terminal
 echo -e "${GREEN}Docker container logs:${NC}"
diff --git a/stop-nodes.sh b/stop-nodes.sh
index e746181..2e19840 100755
--- a/stop-nodes.sh
+++ b/stop-nodes.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -euo pipefail
 
 # Stop all cardano node containers matching the pattern node-*-*-container
 # This handles versioned containers (e.g., node-preprod-10.5.3-container)