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Overview

Constructor parameters are ABI-encoded without a selector. You append the encoded params to the contract creation bytecode when deploying.

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Quick Start

import { Abi } from '@tevm/voltaire/Abi';
import { Hex } from '@tevm/voltaire/Hex';

const ctor = {
  type: 'constructor',
  stateMutability: 'nonpayable',
  inputs: [
    { type: 'string', name: 'name' },
    { type: 'string', name: 'symbol' },
    { type: 'uint8', name: 'decimals' }
  ]
} as const;

const params = Abi.Constructor.encodeParams(ctor, [
  'MyToken',
  'MTK',
  18
]);

const bytecode = '0x6001600080600a6000396000f3...';
const deployData = Hex.concat(bytecode, Hex.fromBytes(params));

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Append to Bytecode

The deploy data is bytecode + encoded params. If you already have a Uint8Array of bytecode, concatenate the raw bytes: 
const deployBytes = new Uint8Array(bytecodeBytes.length + params.length);
deployBytes.set(bytecodeBytes, 0);
deployBytes.set(params, bytecodeBytes.length);

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Error Handling

If a value does not match the constructor input types, encoding throws an AbiEncodingError.

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See Also