Function encode

lib/util/hash/hash-digest.js:43–68

(buffer, base)

 * @returns {string} encoded buffer
 */
const encode = (buffer, base) => {
	if (buffer.length === 0) return "";
	const alphabet = ENCODE_TABLE[base];
	const bigIntBase = BigInt(alphabet.length);
	// Leading zero bytes are not significant in the BigInt below, so they would be
	// lost; Base58Check-style, re-emit each as one leading alphabet[0] char. Keeps
	// the encoding reversible and its length tracking the input (prefix-stable slices).
	let zeros = 0;
	while (zeros < buffer.length && buffer[zeros] === 0) zeros++;
	// Convert buffer to BigInt efficiently using bitwise operations
	let value = ZERO;
	for (let i = 0; i < buffer.length; i++) {
		value = (value << EIGHT) | BigInt(buffer[i]);
	}
	// Convert to baseX string efficiently using array
	/** @type {string[]} */
	const digits = [];
	while (value > ZERO) {
		const remainder = Number(value % bigIntBase);
		digits.push(alphabet[remainder]);
		value /= bigIntBase;
	}
	// Pushed last so they land first after the reverse below.
	for (let i = 0; i < zeros; i++) digits.push(alphabet[0]);
	return digits.reverse().join("");
};

/**
 * Returns buffer.