ox/_esm/core/internal/hex.js

Ethereum Standard Library

import * as Hex from '../Hex.js';
/** @internal */
export function assertSize(hex, size_) {
    if (Hex.size(hex) > size_)
        throw new Hex.SizeOverflowError({
            givenSize: Hex.size(hex),
            maxSize: size_,
        });
}
/** @internal */
export function assertStartOffset(value, start) {
    if (typeof start === 'number' && start > 0 && start > Hex.size(value) - 1)
        throw new Hex.SliceOffsetOutOfBoundsError({
            offset: start,
            position: 'start',
            size: Hex.size(value),
        });
}
/** @internal */
export function assertEndOffset(value, start, end) {
    if (typeof start === 'number' &&
        typeof end === 'number' &&
        Hex.size(value) !== end - start) {
        throw new Hex.SliceOffsetOutOfBoundsError({
            offset: end,
            position: 'end',
            size: Hex.size(value),
        });
    }
}
/** @internal */
export function pad(hex_, options = {}) {
    const { dir, size = 32 } = options;
    if (size === 0)
        return hex_;
    const hex = hex_.replace('0x', '');
    if (hex.length > size * 2)
        throw new Hex.SizeExceedsPaddingSizeError({
            size: Math.ceil(hex.length / 2),
            targetSize: size,
            type: 'Hex',
        });
    return `0x${hex[dir === 'right' ? 'padEnd' : 'padStart'](size * 2, '0')}`;
}
/** @internal */
export function trim(value, options = {}) {
    const { dir = 'left' } = options;
    let data = value.replace('0x', '');
    let sliceLength = 0;
    for (let i = 0; i < data.length - 1; i++) {
        if (data[dir === 'left' ? i : data.length - i - 1].toString() === '0')
            sliceLength++;
        else
            break;
    }
    data =
        dir === 'left'
            ? data.slice(sliceLength)
            : data.slice(0, data.length - sliceLength);
    if (data === '0')
        return '0x';
    if (dir === 'right' && data.length % 2 === 1)
        return `0x${data}0`;
    return `0x${data}`;
}
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