Kaia Fee Delegation | Skills Pool

Skill File

Kaia Fee Delegation

Kaia's protocol-native fee delegation system. Use when building gasless UX, implementing gas sponsorship, or working with fee-delegated transactions.

kaiachain0 starsApr 13, 2026

Occupation
Categories: DeFi

Skill Content

Fee Delegation — Protocol-Native Gas Sponsorship

Fee delegation is Kaia's killer feature. A third party pays gas fees for the user at the protocol level — no smart contracts needed.

NOT ERC-4337. No bundlers, no paymasters, no UserOperations. Two signatures, one transaction.

How It Works

Sender creates a fee-delegated transaction type
Sender signs → sender's signature (authorizes the action)
Transaction sent to fee payer (off-chain coordination)
Fee payer signs → fee payer's signature (authorizes gas payment)
Transaction submitted with both signatures
Gas deducted from fee payer's account, not sender's

Full vs Partial Fee Delegation

Type	Fee Payer Covers

Related Skills

const { Wallet, JsonRpcProvider } = require("@kaiachain/ethers-ext/v6");

// Sender creates and signs
const sender = new Wallet(senderPrivKey, provider);
const tx = {
  type: TxType.FeeDelegatedValueTransfer,
  to: recipientAddr,
  value: parseKaia("1"),
  from: sender.address,
};
const senderTx = await sender.signTransaction(tx);

// Fee payer signs and sends
const feePayer = new Wallet(feePayerPrivKey, provider);
const sentTx = await feePayer.sendTransactionAsFeePayer(senderTx);