Transactions

Sponsor gas

Sponsor gas fees for transactions using EIP-7702 or ERC-4337. Thirdweb will handle the gas fees for you.

EIP-7702 (recommended)

Sponsor gas fees using EIP-7702, enabling gasless transactions and improving user experience.

EIP-7702 is the default execution mode in the thirdweb API for your user and server wallets.

Example sponsored contract write request:

Request

POST

/v1/contracts/write


fetch("https://api.thirdweb.com/v1/contracts/write", {
  method: "POST",
  headers: {
    "x-secret-key": "<your-project-secret-key>",
  },
  body: {
    calls: [
      {
        contractAddress: "0xe352Cf5f74e3ACfd2d59EcCee6373d2Aa996086e",
        method: "function approve(address spender, uint256 amount)",
        params: [
          "0x4fA9230f4E8978462cE7Bf8e6b5a2588da5F4264",
          1000000000,
        ],
      },
    ],
    chainId: 84532,
    from: "0x1234567890123456789012345678901234567890",
  },
});

Response


{
  "result": {
    "transactionIds": [
      "string"
    ]
  }
}

That's it! All transactions executed by the user will be sponsored via the thirdweb infrastructure.