@ethersproject/abi

Encoding Function Calls

This feature allows you to encode function calls to be sent to the Ethereum blockchain. In this example, the `transfer` function is encoded with the specified parameters.

const { Interface } = require('@ethersproject/abi');
const abi = [
  "function transfer(address to, uint amount)"
];
const iface = new Interface(abi);
const data = iface.encodeFunctionData("transfer", ["0x742d35Cc6634C0532925a3b844Bc454e4438f44e", 1000]);
console.log(data);

Decoding Function Results

This feature allows you to decode the results returned by a smart contract function call. In this example, the result of the `balanceOf` function is decoded.

const { Interface } = require('@ethersproject/abi');
const abi = [
  "function balanceOf(address owner) view returns (uint)"
];
const iface = new Interface(abi);
const result = iface.decodeFunctionResult("balanceOf", "0x00000000000000000000000000000000000000000000000000000000000003e8");
console.log(result);

Parsing Event Logs

This feature allows you to parse event logs emitted by smart contracts. In this example, a `Transfer` event log is parsed to extract the event details.

const { Interface } = require('@ethersproject/abi');
const abi = [
  "event Transfer(address indexed from, address indexed to, uint amount)"
];
const iface = new Interface(abi);
const log = {
  data: "0x00000000000000000000000000000000000000000000000000000000000003e8",
  topics: [
    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
    "0x000000000000000000000000742d35cc6634c0532925a3b844bc454e4438f44e",
    "0x000000000000000000000000742d35cc6634c0532925a3b844bc454e4438f44e"
  ]
};
const event = iface.parseLog(log);
console.log(event);