@samouraiwallet/auth47/dist/index.js

A JS implementation of the Auth47 protocol

import { BIP47Factory } from '@samouraiwallet/bip47';
import * as utils from '@samouraiwallet/bip47/utils';
import { bitcoinMessageFactory } from '@samouraiwallet/bitcoinjs-message';
import { Auth47Error, validateProof, createCallbackUri, validateGenerateUriArgs } from './decoders.js';
const getNetwork = (networkString) => {
    return utils.networks[networkString] ?? null;
};
export class Auth47Verifier {
    constructor(ecc, callbackUri) {
        this.bip47 = BIP47Factory(ecc);
        this.bitcoinjsMessage = bitcoinMessageFactory(ecc);
        this.callbackUri = createCallbackUri(callbackUri);
    }
    generateURI(args) {
        validateGenerateUriArgs(args);
        const uri = new URL(`auth47://${args.nonce}`);
        uri.searchParams.set('c', this.callbackUri);
        if (args.expires)
            uri.searchParams.set('e', args.expires.toString(10));
        if (args.resource)
            uri.searchParams.set('r', args.resource);
        return decodeURIComponent(uri.toString());
    }
    verifyProof(proof, networkString = 'bitcoin') {
        const network = getNetwork(networkString);
        if (!network) {
            throw new Auth47Error(`Invalid network: ${networkString} (expected "bitcoin", "testnet" or "regtest")`);
        }
        try {
            validateProof(proof);
            const address = 'address' in proof ? proof.address : this.bip47.fromBase58(proof.nym, network).getNotificationAddress();
            const verified = this.bitcoinjsMessage.verify(proof.challenge, address, proof.signature, network.messagePrefix);
            if (!verified) {
                throw new Auth47Error('invalid signature');
            }
            return {
                result: 'ok',
                data: proof
            };
        }
        catch (error) {
            return {
                result: 'error',
                error: error instanceof Auth47Error ? error.message : String(error)
            };
        }
    }
}
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