viem/_esm/utils/data/pad.js

TypeScript Interface for Ethereum

import { SizeExceedsPaddingSizeError, } from '../../errors/data.js';
export function pad(hexOrBytes, { dir, size = 32 } = {}) {
    if (typeof hexOrBytes === 'string')
        return padHex(hexOrBytes, { dir, size });
    return padBytes(hexOrBytes, { dir, size });
}
export function padHex(hex_, { dir, size = 32 } = {}) {
    if (size === null)
        return hex_;
    const hex = hex_.replace('0x', '');
    if (hex.length > size * 2)
        throw new SizeExceedsPaddingSizeError({
            size: Math.ceil(hex.length / 2),
            targetSize: size,
            type: 'hex',
        });
    return `0x${hex[dir === 'right' ? 'padEnd' : 'padStart'](size * 2, '0')}`;
}
export function padBytes(bytes, { dir, size = 32 } = {}) {
    if (size === null)
        return bytes;
    if (bytes.length > size)
        throw new SizeExceedsPaddingSizeError({
            size: bytes.length,
            targetSize: size,
            type: 'bytes',
        });
    const paddedBytes = new Uint8Array(size);
    for (let i = 0; i < size; i++) {
        const padEnd = dir === 'right';
        paddedBytes[padEnd ? i : size - i - 1] =
            bytes[padEnd ? i : bytes.length - i - 1];
    }
    return paddedBytes;
}
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