This API supports only fee delegated type (including partial fee delegated type) transactions.

NOTE: The fee payer address to sign with must be unlocked.

📘
Supported on Klaytn (mainnet) only.

Parameters

Request

The required parameters depend on the transaction type.
Check the proper parameters in Working with Klaytn Transaction Types.

Result

Type	Description
32-byte DATA	The transaction hash

If you deployed a contract, use klay_getTransactionReceipt to get the contract address.

API Endpoint

The format of a Klaytn API endpoint is
https://open-platform.nodereal.io/{{apiKey}}/klaytn/

Here is an example:
https://open-platform.nodereal.io/4c0a1c23661a4e26bcbcwed461e34ea9/klaytn/

Example

params: [{
  "typeInt": 18,
  "from": "0xcd01b2b44584fb143824c1ea0231bebaea826b9d",
  "to": "0x44711E89b0c23845b5B2ed9D3716BA42b8a3e075",
  "gas": "0x4a380",
  "gasPrice": "0x5d21dba00",
  "nonce": "0x2c",
  "value": "0xf4",
  "input": "0xb3f98adc0000000000000000000000000000000000000000000000000000000000000001",
  "feePayer": "0xcd01b2b44584fb143824c1ea0231bebaea826b9d",
  "feeRatio": 30,
  "signatures": [{
    "V": "0x4e43", 
    "R": "0xd3ff5ca7bdd0120d79e8aa875593d05022fe74ce2b7a0594218d53c0fdca7fa9", 
    "S": "0x2c100e69d2455afc9393e017514063da18b18db6f7e811d0aeaf6002515b58ef"
  }]
}]

// Request
curl https://open-platform.nodereal.io/{{apiKey}}/klaytn/ \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"klay_sendTransactionAsFeePayer","params":[{see above}],"id":1}' 

// Result
{
  "jsonrpc": "2.0","id":1,
  "result": "0x77ec2d910d0b96585373e2d6508f2b2d8c2af7d0060d2012e1cb2f0ee9d74830"
}