Klaytn: deploying smart contract with fee delegation

fee_delegated_contract_deploy.js

const Caver = require('caver-js');
const caver = new Caver('https://api.baobab.klaytn.net:8651/');

const sender = caver.klay.accounts.wallet.add('sender_private_key');
const payer = caver.klay.accounts.wallet.add('fee_payer_key', 'target_address');

// an arbitrary contract is used
async function run() {
    // make sure `data` starts with 0x
    const { rawTransaction: senderRawTransaction } = await caver.klay.accounts.signTransaction({
        type: 'FEE_DELEGATED_SMART_CONTRACT_DEPLOY',
        from: sender.address,
        data: "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",
        gas: '3000000',
        value: 0,
    }, sender.privateKey);

    // signed raw transaction
    console.log("Raw TX:\n", senderRawTransaction);
    
    // send fee delegated transaction with fee payer information
    caver.klay.sendTransaction({
        senderRawTransaction: senderRawTransaction,
        feePayer: payer.address
    })
        .on('transactionHash', function (hash) {
            console.log(">>> tx_hash for deploy =", hash);
        })
        .on('receipt', function (receipt) {
            console.log(">>> receipt arrived: ", receipt);
        })
        .on('error', function (err) {
            console.error(">>> error: ", err);
        });
}

run();