eth_signTransaction

Signs a transaction that can be submitted to the network at a later time using with eth_sendRawTransaction on Avalanche C-Chain.

Parameters

1. Object - The transaction object
   • from: DATA, 20 Bytes - The address the transaction is sent from.
   • to: DATA, 20 Bytes - (optional when creating new contract) The address the transaction is directed to.
   • gas: QUANTITY - (optional, default: 90000) Integer of the gas provided for the transaction execution.
   • gasPrice: QUANTITY - (optional, default: To-Be-Determined) Integer of the gasPrice used for each paid gas.
   • value: QUANTITY - (optional) Integer of the value sent with this transaction.
   • data: DATA - The compiled code of a contract OR the hash of the invoked method signature and encoded parameters.
   • nonce: QUANTITY - (optional) Integer of a nonce.

{
  "jsonrpc": "2.0",
  "method": "eth_signTransaction",
  "params": [
    {
      "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
      "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
      "gas": "0x76c0",
      "gasPrice": "0x9184e72a000",
      "value": "0x9184e72a"
    }
  ],
  "id": 1
}

Returns

Object - The signed transaction object.

Implementation Example

cURL

curl -X POST https://api-avalanche-mainnet-archive.n.dwellir.com/YOUR_API_KEY/ext/bc/C/rpc \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_signTransaction",
    "params": [
      {
        "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
        "gas": "0x76c0",
        "gasPrice": "0x9184e72a000",
        "value": "0x9184e72a"
      }
    ],
    "id": 1
  }'

JavaScript

const response = await fetch('https://api-avalanche-mainnet-archive.n.dwellir.com/YOUR_API_KEY/ext/bc/C/rpc', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'eth_signTransaction',
    params: [
      {
        from: '0xb60e8dd61c5d32be8058bb8eb970870f07233155',
        to: '0xd46e8dd67c5d32be8058bb8eb970870f07244567',
        gas: '0x76c0',
        gasPrice: '0x9184e72a000',
        value: '0x9184e72a'
      }
    ],
    id: 1
  })
});

const data = await response.json();
console.log(data.result);

Response Example

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": {
    "raw": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
    "tx": {
      "hash": "0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b",
      "nonce": "0x0",
      "blockHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
      "blockNumber": "0x0",
      "transactionIndex": "0x0",
      "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
      "to": "0x85h43d8a49eeb85d32cf465507dd71d507100c1",
      "value": "0x7f110",
      "gas": "0x7f110",
      "gasPrice": "0x09184e72a000",
      "input": "0x603880600c6000396000f300603880600c6000396000f3603880600c6000396000f360"
    }
  }
}

Note: This method requires access to the private key for the 'from' address and returns the signed transaction that can be broadcast later.

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Need help? Contact our support team or check the Avalanche documentation.