@bsv/sdk/dist/esm/src/primitives/hex.js

BSV Blockchain Software Development Kit

// src/primitives/hex.ts
// Accepts empty string because empty byte arrays are valid in Bitcoin.
const PURE_HEX_REGEX = /^[0-9a-fA-F]*$/;
export function assertValidHex(msg) {
    if (typeof msg !== 'string') {
        throw new TypeError('Invalid hex string');
    }
    // allow empty
    if (msg.length === 0)
        return;
    if (!PURE_HEX_REGEX.test(msg)) {
        throw new Error('Invalid hex string');
    }
}
export function normalizeHex(msg) {
    assertValidHex(msg);
    // If empty, return empty — never force to "00"
    if (msg.length === 0)
        return '';
    let normalized = msg.toLowerCase();
    // Pad odd-length hex
    if (normalized.length % 2 !== 0) {
        normalized = '0' + normalized;
    }
    return normalized;
}
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