Snowflake ID Generator (src/snowflake.ts)

Utility generating unique 64-bit hex Snowflake IDs with custom epoch and extended sequence for distributed systems.

// Source: https://github.com/can1357/oh-my-pi | License: MIT | Copyright 2025 Mario Zechner
// Provided via justclaw.it.com; keep this notice with the code.
function randu32() {
	return crypto.getRandomValues(new Uint32Array(1))[0];
}

const EPOCH = 1420070400000;
const MAX_SEQ = 0x3fffff;
const MAX_DT = 2 ** 42 - 1;

// Snowflake as a hex string (16 chars, zero-padded).
//
// Since this is not distributed (no machine ID needed), we use an extended
// 22-bit sequence instead of the standard 10-bit machine ID + 12-bit sequence.
//
type Snowflake = string & { readonly __brand: unique symbol };

namespace Snowflake {
	// Hex string validation pattern (16 lowercase hex chars).
	//
	export const PATTERN = /^[0-9a-f]{16}$/;

	// Epoch timestamp.
	//
	export const EPOCH_TIMESTAMP = EPOCH;

	// M

... (truncated -- full source via MCP)