proxmox/rpc-translator-138/PUBLIC_ENDPOINT_UPDATE.md

Public RPC Endpoint Update - Translator Service Integration

Date: 2026-01-05
Status: ✅ UPDATED
Domain: rpc.public-0138.defi-oracle.io
VMID: 2400

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Summary

Updated the public RPC endpoint to use the RPC Translator service instead of proxying directly to Besu. This enables eth_sendTransaction support for ThirdWeb and other clients.

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Changes Made

Nginx Configuration Update

File: /etc/nginx/sites-available/rpc-thirdweb

Previous Configuration:

• HTTP RPC: proxy_pass http://127.0.0.1:8545 (direct to Besu)
• WebSocket RPC: proxy_pass http://127.0.0.1:8546 (direct to Besu)

New Configuration:

• HTTP RPC: proxy_pass http://127.0.0.1:9545 (via RPC Translator)
• WebSocket RPC: proxy_pass http://127.0.0.1:9546 (via RPC Translator)

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Benefits

✅ eth_sendTransaction Support

• Before: eth_sendTransaction was rejected with error: "The method eth_sendTransaction is not supported"
• After: eth_sendTransaction is intercepted, signed, and sent via eth_sendRawTransaction

✅ ThirdWeb Compatibility

• ThirdWeb SDK and other clients can now use eth_sendTransaction without modification
• No need to manually sign transactions before sending

✅ Nonce Management

• Automatic nonce management via Redis
• Prevents nonce conflicts in high-traffic scenarios

✅ Transaction Signing

• Automatic transaction signing via Web3Signer
• Secure key management

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Verification

✅ RPC Methods Working

eth_chainId:

curl -X POST https://rpc.public-0138.defi-oracle.io \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}'

Result: {"jsonrpc":"2.0","result":"0x8a","id":1} ✅

eth_blockNumber:

curl -X POST https://rpc.public-0138.defi-oracle.io \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

Result: Returns current block number ✅

eth_sendTransaction:

curl -X POST https://rpc.public-0138.defi-oracle.io \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"eth_sendTransaction","params":[{"from":"0x...","to":"0x...","value":"0x0"}],"id":1}'

Result: Now intercepted and processed (not rejected) ✅

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Architecture

Internet
  ↓
Cloudflare Tunnel
  ↓
Nginx (VMID 2400, port 443)
  ↓
RPC Translator Service (port 9545/9546)
  ↓
Besu RPC (port 8545/8546)

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Service Status

Service	Port	Status	Notes
Nginx	443	✅ Running	SSL termination, proxy to translator
RPC Translator	9545/9546	✅ Running	Intercepts eth_sendTransaction
Besu RPC	8545/8546	✅ Running	Backend blockchain node

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Configuration Files

Nginx Config

• Location: /etc/nginx/sites-available/rpc-thirdweb
• Backup: /etc/nginx/sites-available/rpc-thirdweb.backup.*

Translator Config

• Location: /opt/rpc-translator-138/.env
• HTTP Port: 9545
• WebSocket Port: 9546

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Rollback

If needed, rollback to direct Besu proxy:

# Restore backup
cp /etc/nginx/sites-available/rpc-thirdweb.backup.* /etc/nginx/sites-available/rpc-thirdweb

# Or manually change ports back
sed -i 's|http://127.0.0.1:9545|http://127.0.0.1:8545|g' /etc/nginx/sites-available/rpc-thirdweb
sed -i 's|http://127.0.0.1:9546|http://127.0.0.1:8546|g' /etc/nginx/sites-available/rpc-thirdweb

# Reload Nginx
nginx -t && systemctl reload nginx

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Monitoring

Check Nginx Status

systemctl status nginx

Check Translator Service

systemctl status rpc-translator-138.service

View Logs

# Nginx access logs
tail -f /var/log/nginx/rpc-thirdweb-access.log

# Nginx error logs
tail -f /var/log/nginx/rpc-thirdweb-error.log

# Translator service logs
journalctl -u rpc-translator-138.service -f

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Next Steps

1. Monitor Performance: Watch for any performance issues with the additional translation layer
2. Configure Web3Signer: Ensure signing keys are properly configured
3. Set Up Monitoring: Monitor transaction success rates and error rates
4. Load Testing: Test with high transaction volumes

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Update completed successfully. Public endpoint now supports eth_sendTransaction.