Sign and Broadcast Transaction
There are two ways to sign and broadcast a transaction to the Ethereum network to stake MATIC:
- Using a single piece of code.
- Signing the transaction with a code and then broadcasting it with an API method.
Using Code
- Retrieve unsigned serialized transactions in Base64 encrypted format.
- Sign the transaction using the following code. The code example uses ethers.js 6.10.0.
require("dotenv").config();
const { ethers } = require('ethers');
async function signAndBroadcast() {
console.log("Started");
// Enter the serialized transaction
const rawTransaction = process.env.RAW_TRANSACTION;
// Enter the private key of the address used to transfer the stake amount
const privateKey = process.env.PRIVATE_KEY;
// Enter the selected RPC URL
const rpcURL = process.env.RPC_URL;
// Initialize the provider using the RPC URL
const provider = new ethers.JsonRpcProvider(rpcURL);
// Initialize a new Wallet instance
const wallet = new ethers.Wallet(privateKey, provider);
// Parse the raw transaction
const tx = ethers.Transaction.from(rawTransaction);
const newTx = {
to: tx.to,
data: tx.data,
chainId: tx.chainId,
value: tx.value,
gasLimit: tx.gasLimit,
type: 2,
nonce: await provider.getTransactionCount(wallet.address),
// Enter the max fee per gas and prirorty fee
maxFeePerGas: ethers.parseUnits(process.env.MAX_FEE_PER_GAS_IN_GWEI, 'gwei'),
maxPriorityFeePerGas: ethers.parseUnits(process.env.MAX_PRIORITY_FEE_IN_GWEI, 'gwei')
}
// Sign the transaction
const signedTransaction = await wallet.signTransaction(newTx);
// Send the signed transaction
const transactionResponse = await provider.broadcastTransaction(signedTransaction);
return transactionResponse;
}
signAndBroadcast()
.then((transactionResponse) => {
console.log(
"Transaction broadcasted, transaction hash:",
transactionResponse.hash
);
})
.catch((error) => {
console.error("Error:", error);
})
.finally(() => {
console.log("Finished");
});
Using Code and API
- Retrieve unsigned serialized transactions in Base64 encrypted format.
- Sign the transaction using the following code:
require("dotenv").config();
const { ethers } = require('ethers');
async function signAndBroadcast() {
console.log("Started");
// Enter the serialized transaction
const rawTransaction = process.env.RAW_TRANSACTION;
// Enter the private key of the address used to transfer the stake amount
const privateKey = process.env.PRIVATE_KEY;
// Enter the selected RPC URL
const rpcURL = process.env.RPC_URL;
// Initialize the provider using the RPC URL
const provider = new ethers.JsonRpcProvider(rpcURL);
// Initialize a new Wallet instance
const wallet = new ethers.Wallet(privateKey, provider);
// Parse the raw transaction
const tx = ethers.Transaction.from(rawTransaction);
const newTx = {
to: tx.to,
data: tx.data,
chainId: tx.chainId,
value: tx.value,
gasLimit: tx.gasLimit,
type: 2,
nonce: await provider.getTransactionCount(wallet.address),
// Enter the max fee per gas and prirorty fee
maxFeePerGas: ethers.parseUnits(process.env.MAX_FEE_PER_GAS_IN_GWEI, 'gwei'),
maxPriorityFeePerGas: ethers.parseUnits(process.env.MAX_PRIORITY_FEE_IN_GWEI, 'gwei')
}
// Sign the transaction
const signedTransaction = await wallet.signTransaction(newTx);
return signedTransaction;
}
signAndBroadcast()
.then((signedTransaction) => {
console.log(
"Signed transaction is",
signedTransaction
);
})
.catch((error) => {
console.error("Error:", error);
})
.finally(() => {
console.log("Finished");
});
- Send the signed transaction to the Ethereum network by making a POST request to /api/v1/polygon/transaction/send.
Example request:
curl --request POST \
--url https://api.p2p.org/api/v1/polygon/transaction/send \
--head 'accept: application/json' \
--head 'Authorization: Bearer <token>' \
--head 'Content-Type: application/json' \
--data '
{
"signedTransaction": "0x02f902d705808301674e8508530af16e830186a094681a1b3441c6bfb12f91651efd9f02c83c0702938901bc16d674ec800000b902a44f498c730000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000001a00000000000000000000000000000000000000000000000000000000000000260000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000030aa5f27070a21d79455c4a9b73c0aa4a8b1a65a1fb530d7fd8e6cd23aa16660679ac43ee4861098f6d9166aed3a4d8abb0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002001000000000000000000000028c84612d37de9209018ad96167f12169b653e9a000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000060978c565cd915f4e885b4201093d1501697610eb9ee99b9b60b70434dc330e98d5b42927725304ded48483a8b8f39506d09bcb22ee18d4f6b50257946ac5ee360385308d95c0e2bc963902d42e985c29ee489aa3c989ac1561c952a6424f107a800000000000000000000000000000000000000000000000000000000000000014cb452f6e3f10ba2175c86a0284f53fcb61404b458393391abc3d5622e3e55cdc0",
"stakerAddress": "0x39D02C253dA1d9F85ddbEB3B6Dc30bc1EcBbFA17"
}
'
signedTransaction
— serialized signed transaction.stakerAddress
— staker account address.
What's Next?
- Getting Started.
- Withdrawal.
- Staking API reference.
Updated 4 months ago