viem/_esm/utils/data/trim.js

TypeScript Interface for Ethereum

export function trim(hexOrBytes, { dir = 'left' } = {}) {
    let data = typeof hexOrBytes === 'string' ? hexOrBytes.replace('0x', '') : hexOrBytes;
    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 (typeof hexOrBytes === 'string') {
        if (data.length === 1 && dir === 'right')
            data = `${data}0`;
        return `0x${data.length % 2 === 1 ? `0${data}` : data}`;
    }
    return data;
}
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