txpool_content method crashes with 'method handler crashed' error

[cshintov]

Bug Description

The txpool_content RPC method crashes with error code -32000 "method handler crashed" when called on a BSC mainnet archive node running Erigon v1.4.3.

Environment

• Version: erigon/1.4.3/linux-amd64/go1.24.11 (commit: 1.4.3-dev-4a9d2ee4)
• Network: BSC Mainnet
• Node Type: Archive (--prune.mode archive)
• API Configuration: --http.api eth,debug,net,trace,web3,erigon,txpool

Steps to Reproduce

1. Start bsc-erigon v1.4.3 with archive mode and txpool API enabled
2. Call the txpool_content method:

curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"txpool_content","params":[],"id":1}' \
  http://localhost:8545

Expected Behavior

The method should return transaction pool content with pending, baseFee, and queued transactions, similar to:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "pending": {...},
    "baseFee": {...},
    "queued": {...}
  }
}

Actual Behavior

The method crashes and returns:

{"jsonrpc":"2.0","id":1,"error":{"code":-32000,"message":"method handler crashed"}}

Additional Context

• Other txpool methods work fine:
  • ✅ txpool_status returns: {"pending":"0x3e7","baseFee":"0x0","queued":"0x80"}
• The txpool API is properly initialized and enabled
• The crash appears to be in the Content() method implementation in rpc/jsonrpc/txpool_api.go
• Possible crash points:
  • api.db.BeginTemporalRo(ctx) - database handle initialization issue
  • newRPCPendingTransaction() - transaction formatting bug

Impact

This affects production BSC RPC providers who need to expose txpool_content for their users. The method is documented as available but crashes in practice.

Code Reference

Implementation: https://github.com/node-real/bsc-erigon/blob/v1.4.3/rpc/jsonrpc/txpool_api.go#L48-L115