Converts the Cloudflare D1 binding to the hash used as the sqlite filename by Miniflare

d1-binding-hash-converter

import crypto from "crypto";

function convert(binding) {
	const key = crypto.createHash("sha256").update("miniflare-D1DatabaseObject").digest();
	const nameHmac = crypto
		.createHmac("sha256", key)
		.update(binding)
		.digest()
		.subarray(0, 16);
	const hmac = crypto
		.createHmac("sha256", key)
		.update(nameHmac)
		.digest()
		.subarray(0, 16);
	return Buffer.concat([nameHmac, hmac]).toString("hex");
}


console.log(convert("DB"))
// OUTPUT: e7352547963de7050bd7d94658afc4fe78b61811b7815da12d90be8e863abf4d