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/*
This file is part of GNU Taler
(C) 2023 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* Imports.
*/
import {
AbsoluteTime,
AmountString,
ContractTermsUtil,
decodeCrock,
Duration,
encodeCrock,
getRandomBytes,
hash,
j2s,
PeerContractTerms,
TalerError,
} from "@gnu-taler/taler-util";
import {
CryptoDispatcher,
EncryptContractRequest,
SpendCoinDetails,
SynchronousCryptoWorkerFactoryPlain,
} from "@gnu-taler/taler-wallet-core";
import {
checkReserve,
downloadExchangeInfo,
findDenomOrThrow,
topupReserveWithBank,
withdrawCoin,
} from "@gnu-taler/taler-wallet-core/dbless";
import { GlobalTestState, harnessHttpLib } from "../harness/harness.js";
import { createSimpleTestkudosEnvironmentV2 } from "../harness/helpers.js";
/**
* Test the exchange's purse API.
*/
export async function runExchangePurseTest(t: GlobalTestState) {
// Set up test environment
const { bank, exchange } = await createSimpleTestkudosEnvironmentV2(t);
const http = harnessHttpLib;
const cryptoDisp = new CryptoDispatcher(
new SynchronousCryptoWorkerFactoryPlain(),
);
const cryptoApi = cryptoDisp.cryptoApi;
try {
// Withdraw digital cash into the wallet.
const exchangeInfo = await downloadExchangeInfo(exchange.baseUrl, http);
const reserveKeyPair = await cryptoApi.createEddsaKeypair({});
let reserveUrl = new URL(
`reserves/${reserveKeyPair.pub}`,
exchange.baseUrl,
);
reserveUrl.searchParams.set("timeout_ms", "30000");
const longpollReq = http.fetch(reserveUrl.href, {
method: "GET",
});
await topupReserveWithBank({
amount: "TESTKUDOS:10" as AmountString,
http,
reservePub: reserveKeyPair.pub,
corebankApiBaseUrl: bank.corebankApiBaseUrl,
exchangeInfo,
});
console.log("waiting for longpoll request");
const resp = await longpollReq;
console.log(`got response, status ${resp.status}`);
console.log(exchangeInfo);
await checkReserve(http, exchange.baseUrl, reserveKeyPair.pub);
const d1 = findDenomOrThrow(
exchangeInfo,
"TESTKUDOS:8" as AmountString,
{},
);
const coin = await withdrawCoin({
http,
cryptoApi,
reserveKeyPair: {
reservePriv: reserveKeyPair.priv,
reservePub: reserveKeyPair.pub,
},
denom: d1,
exchangeBaseUrl: exchange.baseUrl,
});
const amount = "TESTKUDOS:5" as AmountString;
const contractTerms: PeerContractTerms = {
amount,
summary: "Hello",
purse_expiration: AbsoluteTime.toProtocolTimestamp(
AbsoluteTime.addDuration(
AbsoluteTime.now(),
Duration.fromSpec({ minutes: 1 }),
),
),
};
const mergeReservePair = await cryptoApi.createEddsaKeypair({});
const pursePair = await cryptoApi.createEddsaKeypair({});
const mergePair = await cryptoApi.createEddsaKeypair({});
const contractPair = await cryptoApi.createEddsaKeypair({});
const contractEncNonce = encodeCrock(getRandomBytes(24));
const pursePub = pursePair.pub;
const hContractTerms = ContractTermsUtil.hashContractTerms(contractTerms);
const purseSigResp = await cryptoApi.signPurseCreation({
hContractTerms,
mergePub: mergePair.pub,
minAge: 0,
purseAmount: amount,
purseExpiration: contractTerms.purse_expiration,
pursePriv: pursePair.priv,
});
const coinSpend: SpendCoinDetails = {
ageCommitmentProof: undefined,
coinPriv: coin.coinPriv,
coinPub: coin.coinPub,
contribution: amount,
denomPubHash: coin.denomPubHash,
denomSig: coin.denomSig,
};
const depositSigsResp = await cryptoApi.signPurseDeposits({
exchangeBaseUrl: exchange.baseUrl,
pursePub: pursePair.pub,
coins: [coinSpend],
});
const encryptContractRequest: EncryptContractRequest = {
contractTerms: contractTerms,
mergePriv: mergePair.priv,
pursePriv: pursePair.priv,
pursePub: pursePair.pub,
contractPriv: contractPair.priv,
contractPub: contractPair.pub,
nonce: contractEncNonce,
};
const econtractResp = await cryptoApi.encryptContractForMerge(
encryptContractRequest,
);
const econtractHash = encodeCrock(
hash(decodeCrock(econtractResp.econtract.econtract)),
);
const createPurseUrl = new URL(
`purses/${pursePair.pub}/create`,
exchange.baseUrl,
);
const reqBody = {
amount: amount,
merge_pub: mergePair.pub,
purse_sig: purseSigResp.sig,
h_contract_terms: hContractTerms,
purse_expiration: contractTerms.purse_expiration,
deposits: depositSigsResp.deposits,
min_age: 0,
econtract: econtractResp.econtract,
};
const httpResp = await http.fetch(createPurseUrl.href, {
method: "POST",
body: reqBody,
});
const respBody = await httpResp.json();
console.log("status", httpResp.status);
console.log(j2s(respBody));
const mergeUrl = new URL(`purses/${pursePub}/merge`, exchange.baseUrl);
mergeUrl.searchParams.set("timeout_ms", "300");
const statusResp = await http.fetch(mergeUrl.href, {});
const statusRespBody = await statusResp.json();
console.log(j2s(statusRespBody));
t.assertTrue(statusRespBody.merge_timestamp === undefined);
} catch (e) {
if (e instanceof TalerError) {
console.log(e);
console.log(j2s(e.errorDetail));
} else {
console.log(e);
}
throw e;
}
}
runExchangePurseTest.suites = ["wallet"];
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