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import { fromBase58, toBase58 } from "../util/base58";
import { ID_LENGTH, ENCRYPTION_KEY_LENGTH } from "./constants";
/**
* To share links easily, we encode the id, where the data is stored in redis, together with the secret encryption key.
*/
export function encodeCompositeKey(version: number, id: string, encryptionKey: Uint8Array): string {
if (version < 0 || version > 255) {
throw new Error("Version must fit in a byte");
}
const compositeKey = new Uint8Array([version, ...fromBase58(id), ...encryptionKey]);
return toBase58(compositeKey);
}
/**
* To share links easily, we encode the id, where the data is stored in redis, together with the secret encryption key.
*/
export function decodeCompositeKey(compositeKey: string): { id: string; encryptionKey: Uint8Array; version: number } {
const decoded = fromBase58(compositeKey);
const version = decoded.at(0);
if (version === 1 || version === 2) {
return {
id: toBase58(decoded.slice(1, 1 + ID_LENGTH)),
encryptionKey: decoded.slice(1 + ID_LENGTH, 1 + ID_LENGTH + ENCRYPTION_KEY_LENGTH),
version,
};
}
throw new Error(`Unsupported composite key version: ${version}`);
}
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