# API Method Support Update - Complete

**Date**: 2026-01-05  
**Status**: ✅ **COMPLETE**

---

## Summary

Updated the RPC Translator to fully support both **public network** and **private network** Besu API methods, based on the official Besu documentation:

- [Besu Public Networks API Reference](https://besu.hyperledger.org/public-networks/reference/api)
- [Besu Private Networks API Reference](https://besu.hyperledger.org/private-networks/reference/api)

---

## Changes Made

### 1. RPC Handler Updates

**File**: `src/handlers/rpc-handler.ts`

- **Separated** private network methods from denied methods
- **Added** `PRIVATE_NETWORK_METHODS` constant (CLIQUE, IBFT, QBFT, PERM)
- **Made** private network methods configurable (default: enabled)
- **Improved** error messages for denied methods

**Before:**
```typescript
const DENIED_METHODS = [
  'admin_',
  'debug_',
  'txpool_',
  'miner_',
  'clique_',    // ❌ Denied
  'ibft_',      // ❌ Denied
  'qbft_',      // ❌ Denied
  'perm_',      // ❌ Denied
];
```

**After:**
```typescript
const DENIED_METHODS = [
  'admin_',
  'debug_',
  'txpool_',
  'miner_',
];

const PRIVATE_NETWORK_METHODS = [
  'clique_',    // ✅ Allowed (configurable)
  'ibft_',      // ✅ Allowed (configurable)
  'qbft_',      // ✅ Allowed (configurable)
  'perm_',      // ✅ Allowed (configurable)
];
```

### 2. Configuration Updates

**File**: `src/config.ts`

- **Added** `allowPrivateNetworkMethods` to Config interface
- **Default**: `true` (private network methods enabled)
- **Configurable** via `ALLOW_PRIVATE_NETWORK_METHODS` environment variable

**File**: `env.template`

- **Added** `ALLOW_PRIVATE_NETWORK_METHODS=true` configuration option

### 3. Main Application Updates

**File**: `src/main.ts`

- **Updated** RPC handler instantiation to pass `allowPrivateNetworkMethods` flag

### 4. Documentation Updates

**Created**: `API_METHODS_SUPPORT.md`

- Complete reference for all supported API methods
- Public network methods documentation
- Private network methods documentation (CLIQUE, IBFT, QBFT, PERM)
- Configuration options
- Examples and testing instructions

**Updated**: `README.md`

- Added information about private network method support
- Links to Besu API documentation
- Configuration instructions

---

## Supported Methods

### Public Network Methods ✅

All standard Ethereum JSON-RPC methods:
- `eth_*` - All standard Ethereum methods
- `net_*` - Network methods
- `web3_*` - Web3 utility methods
- `eth_subscribe` / `eth_unsubscribe` - WebSocket subscriptions

### Private Network Methods ✅ (Enabled by Default)

- **CLIQUE**: `clique_*` - Proof of Authority consensus
- **IBFT 2.0**: `ibft_*` - IBFT consensus
- **QBFT**: `qbft_*` - QBFT consensus
- **PERM**: `perm_*` - Permissioning (accounts/nodes allowlist)

### Intercepted Methods ✅

- `eth_sendTransaction` - Automatically signed and converted to `eth_sendRawTransaction`

### Denied Methods ❌ (Security)

- `admin_*` - Admin methods
- `debug_*` - Debug methods
- `txpool_*` - Transaction pool methods
- `miner_*` - Miner control methods

---

## Configuration

### Enable Private Network Methods (Default)

```bash
ALLOW_PRIVATE_NETWORK_METHODS=true
```

### Disable Private Network Methods

```bash
ALLOW_PRIVATE_NETWORK_METHODS=false
```

---

## Examples

### Public Network Method

```bash
curl -X POST http://192.168.11.240:9545 \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_chainId",
    "params": [],
    "id": 1
  }'
```

### Private Network Method (CLIQUE)

```bash
curl -X POST http://192.168.11.240:9545 \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "clique_getSigners",
    "params": ["latest"],
    "id": 1
  }'
```

### Private Network Method (Permissioning)

```bash
curl -X POST http://192.168.11.240:9545 \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "perm_getAccountsAllowlist",
    "params": [],
    "id": 1
  }'
```

---

## Testing

### Test Private Network Method

```bash
# Test CLIQUE method
curl -X POST http://192.168.11.240:9545 \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"clique_getSigners","params":["latest"],"id":1}'

# Test Permissioning method
curl -X POST http://192.168.11.240:9545 \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"perm_getAccountsAllowlist","params":[],"id":1}'
```

---

## Deployment

The updated code has been:
- ✅ Built successfully
- ✅ Configuration updated in `env.template`
- ✅ Ready for deployment

To deploy the update:

```bash
cd /home/intlc/projects/proxmox/rpc-translator-138
./scripts/deploy-all-vmids.sh
```

Or manually:
1. Build: `pnpm run build`
2. Copy updated files to VMIDs
3. Restart services: `systemctl restart rpc-translator-138.service`

---

## References

- [Besu Public Networks API](https://besu.hyperledger.org/public-networks/reference/api)
- [Besu Private Networks API](https://besu.hyperledger.org/private-networks/reference/api)
- `API_METHODS_SUPPORT.md` - Complete method reference

---

## Summary

✅ **Public Network Methods**: Fully supported  
✅ **Private Network Methods**: Enabled by default  
✅ **Configuration**: Configurable via environment variable  
✅ **Documentation**: Complete API reference created  
✅ **Backward Compatible**: Existing functionality preserved  

The RPC Translator now fully supports both public and private network Besu API methods!