@btc-vision/transaction/build/utils/BufferHelper.js

OPNet transaction library allows you to create and sign transactions for the OPNet network.

import { U256_BYTE_LENGTH } from './lengths.js';
export class BufferHelper {
    static bufferToUint8Array(buffer) {
        if (Buffer.isBuffer(buffer)) {
            const length = buffer.byteLength;
            const arrayBuffer = new ArrayBuffer(length);
            const view = new Uint8Array(arrayBuffer);
            for (let i = 0; i < length; ++i) {
                view[i] = buffer[i];
            }
            return view;
        }
        return buffer;
    }
    static uint8ArrayToHex(input) {
        return Buffer.from(input.buffer, 0, input.byteLength).toString('hex');
    }
    static hexToUint8Array(input) {
        if (input.startsWith('0x')) {
            input = input.substring(2);
        }
        if (input.length % 2 !== 0) {
            input = '0' + input;
        }
        const lengthS = input.length / 2;
        const buffer = new Uint8Array(lengthS);
        for (let i = 0; i < lengthS; i++) {
            buffer[i] = parseInt(input.substring(i * 2, i * 2 + 2), 16);
        }
        return buffer;
    }
    static pointerToUint8Array(pointer) {
        const pointerHex = pointer.toString(16).padStart(64, '0');
        return BufferHelper.hexToUint8Array(pointerHex);
    }
    static uint8ArrayToPointer(input) {
        const hex = BufferHelper.uint8ArrayToHex(input);
        return BigInt('0x' + hex);
    }
    static valueToUint8Array(value, length = U256_BYTE_LENGTH) {
        const valueHex = value.toString(16).padStart(length * 2, '0');
        return BufferHelper.hexToUint8Array(valueHex);
    }
    static uint8ArrayToValue(input) {
        const hex = BufferHelper.uint8ArrayToHex(input);
        if (!hex)
            return BigInt(0);
        return BigInt('0x' + hex);
    }
}
BufferHelper.EXPECTED_BUFFER_LENGTH = 32;