eth_sendPrivateRawTransaction

Submit a single user-signed transaction. nexroute acknowledges synchronously with the deterministic transaction hash, then forwards the transaction through private partnerships. Where a profitable on-chain backrun exists, it is appended atomically behind the user transaction; otherwise the user transaction is forwarded alone. The partner-signed transaction is forwarded byte-for-byte; nexroute does not re-sign or modify the payload. Once a hash is returned, delivery is committed.

Request

POST to your Capture endpoint with a JSON-RPC 2.0 envelope.

Params

params is a single-element array containing the request object.

Field	Type	Required	Description
`tx`	`string`	yes	Hex-encoded raw signed transaction (`0x`-prefixed).

Example

curl -X POST https://your-capture-endpoint \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_sendPrivateRawTransaction",
    "params": [{ "tx": "0x02f8..." }]
  }'

const response = await fetch('https://your-capture-endpoint', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    jsonrpc: '2.0',
    id: 1,
    method: 'eth_sendPrivateRawTransaction',
    params: [{ tx: '0x02f8...' }],
  }),
});

const data = await response.json();
console.log(data.result); // 0x... tx hash

Response

A JSON-RPC envelope echoing the request id. result is the 32-byte transaction hash. Once returned, delivery is committed.

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x6b6f1c8f5d2c4a9d3e1f8b7c6a5d4e3f2c1b0a9d8e7f6a5b4c3d2e1f0a9b8c7d"
}

Errors

Code	Cause
`-32601`	Method not supported on this endpoint
`-32000`	Malformed transaction (RLP decode failure, invalid signature)
`-32603`	Internal error during forwarding (rare; nexroute always retries before surfacing)

Getting started

RPC mode

Embedded mode

API reference

eth_sendPrivateRawTransaction

Request

Params

Example

Response

Errors

​Request

​Params

​Example

​Response

​Errors

Request

Params

Example

Response

Errors