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import { HttpRequestLibrary, readTalerErrorResponse } from "../http-common.js";
import { HttpStatusCode } from "../http-status-codes.js";
import { createPlatformHttpLib } from "../http.js";
import { LibtoolVersion } from "../libtool-version.js";
import { hash } from "../nacl-fast.js";
import {
FailCasesByMethod,
ResultByMethod,
opEmptySuccess,
opFixedSuccess,
opKnownHttpFailure,
opSuccessFromHttp,
opUnknownFailure,
} from "../operation.js";
import {
TalerSignaturePurpose,
amountToBuffer,
bufferForUint32,
buildSigPS,
decodeCrock,
eddsaSign,
encodeCrock,
stringToBytes,
timestampRoundedToBuffer,
} from "../taler-crypto.js";
import {
OfficerAccount,
PaginationParams,
SigningKey,
TalerExchangeApi,
codecForAmlDecisionDetails,
codecForAmlRecords,
codecForExchangeConfig,
codecForExchangeKeys,
} from "./types.js";
import { addPaginationParams } from "./utils.js";
export type TalerExchangeResultByMethod<
prop extends keyof TalerExchangeHttpClient,
> = ResultByMethod<TalerExchangeHttpClient, prop>;
export type TalerExchangeErrorsByMethod<
prop extends keyof TalerExchangeHttpClient,
> = FailCasesByMethod<TalerExchangeHttpClient, prop>;
/**
*/
export class TalerExchangeHttpClient {
httpLib: HttpRequestLibrary;
public readonly PROTOCOL_VERSION = "18:0:1";
constructor(
readonly baseUrl: string,
httpClient?: HttpRequestLibrary,
) {
this.httpLib = httpClient ?? createPlatformHttpLib();
}
isCompatible(version: string): boolean {
const compare = LibtoolVersion.compare(this.PROTOCOL_VERSION, version);
return compare?.compatible ?? false;
}
/**
* https://docs.taler.net/core/api-exchange.html#get--config
*
*/
async getConfig() {
const url = new URL(`config`, this.baseUrl);
const resp = await this.httpLib.fetch(url.href, {
method: "GET",
});
switch (resp.status) {
case HttpStatusCode.Ok:
return opSuccessFromHttp(resp, codecForExchangeConfig());
case HttpStatusCode.NotFound:
return opKnownHttpFailure(resp.status, resp);
default:
return opUnknownFailure(resp, await readTalerErrorResponse(resp));
}
}
/**
* https://docs.taler.net/core/api-merchant.html#get--config
*
* PARTIALLY IMPLEMENTED!!
*/
async getKeys() {
const url = new URL(`keys`, this.baseUrl);
const resp = await this.httpLib.fetch(url.href, {
method: "GET",
});
switch (resp.status) {
case HttpStatusCode.Ok:
return opSuccessFromHttp(resp, codecForExchangeKeys());
default:
return opUnknownFailure(resp, await readTalerErrorResponse(resp));
}
}
// TERMS
//
// AML operations
//
/**
* https://docs.taler.net/core/api-exchange.html#get--aml-$OFFICER_PUB-decisions-$STATE
*
*/
async getDecisionsByState(
auth: OfficerAccount,
state: TalerExchangeApi.AmlState,
pagination?: PaginationParams,
) {
const url = new URL(
`aml/${auth.id}/decisions/${TalerExchangeApi.AmlState[state]}`,
this.baseUrl,
);
addPaginationParams(url, pagination);
const resp = await this.httpLib.fetch(url.href, {
method: "GET",
headers: {
"Taler-AML-Officer-Signature": buildQuerySignature(auth.signingKey),
},
});
switch (resp.status) {
case HttpStatusCode.Ok:
return opSuccessFromHttp(resp, codecForAmlRecords());
case HttpStatusCode.NoContent:
return opFixedSuccess({ records: [] });
//this should be unauthorized
case HttpStatusCode.Forbidden:
return opKnownHttpFailure(resp.status, resp);
case HttpStatusCode.Unauthorized:
return opKnownHttpFailure(resp.status, resp);
case HttpStatusCode.NotFound:
return opKnownHttpFailure(resp.status, resp);
case HttpStatusCode.Conflict:
return opKnownHttpFailure(resp.status, resp);
default:
return opUnknownFailure(resp, await readTalerErrorResponse(resp));
}
}
/**
* https://docs.taler.net/core/api-exchange.html#get--aml-$OFFICER_PUB-decision-$H_PAYTO
*
*/
async getDecisionDetails(auth: OfficerAccount, account: string) {
const url = new URL(`aml/${auth.id}/decision/${account}`, this.baseUrl);
const resp = await this.httpLib.fetch(url.href, {
method: "GET",
headers: {
"Taler-AML-Officer-Signature": buildQuerySignature(auth.signingKey),
},
});
switch (resp.status) {
case HttpStatusCode.Ok:
return opSuccessFromHttp(resp, codecForAmlDecisionDetails());
case HttpStatusCode.NoContent:
return opFixedSuccess({ aml_history: [], kyc_attributes: [] });
//this should be unauthorized
case HttpStatusCode.Forbidden:
return opKnownHttpFailure(resp.status, resp);
case HttpStatusCode.Unauthorized:
return opKnownHttpFailure(resp.status, resp);
case HttpStatusCode.NotFound:
return opKnownHttpFailure(resp.status, resp);
case HttpStatusCode.Conflict:
return opKnownHttpFailure(resp.status, resp);
default:
return opUnknownFailure(resp, await readTalerErrorResponse(resp));
}
}
/**
* https://docs.taler.net/core/api-exchange.html#post--aml-$OFFICER_PUB-decision
*
*/
async addDecisionDetails(
auth: OfficerAccount,
decision: Omit<TalerExchangeApi.AmlDecision, "officer_sig">,
) {
const url = new URL(`aml/${auth.id}/decision`, this.baseUrl);
const body = buildDecisionSignature(auth.signingKey, decision);
const resp = await this.httpLib.fetch(url.href, {
method: "POST",
body,
});
switch (resp.status) {
case HttpStatusCode.NoContent:
return opEmptySuccess(resp);
//FIXME: this should be unauthorized
case HttpStatusCode.Forbidden:
return opKnownHttpFailure(resp.status, resp);
case HttpStatusCode.Unauthorized:
return opKnownHttpFailure(resp.status, resp);
//FIXME: this two need to be split by error code
case HttpStatusCode.NotFound:
return opKnownHttpFailure(resp.status, resp);
case HttpStatusCode.Conflict:
return opKnownHttpFailure(resp.status, resp);
default:
return opUnknownFailure(resp, await readTalerErrorResponse(resp));
}
}
}
function buildQuerySignature(key: SigningKey): string {
const sigBlob = buildSigPS(
TalerSignaturePurpose.TALER_SIGNATURE_AML_QUERY,
).build();
return encodeCrock(eddsaSign(sigBlob, key));
}
function buildDecisionSignature(
key: SigningKey,
decision: Omit<TalerExchangeApi.AmlDecision, "officer_sig">,
): TalerExchangeApi.AmlDecision {
const zero = new Uint8Array(new ArrayBuffer(64));
const sigBlob = buildSigPS(TalerSignaturePurpose.TALER_SIGNATURE_AML_DECISION)
//TODO: new need the null terminator, also in the exchange
.put(hash(stringToBytes(decision.justification))) //check null
.put(timestampRoundedToBuffer(decision.decision_time))
.put(amountToBuffer(decision.new_threshold))
.put(decodeCrock(decision.h_payto))
.put(zero) //kyc_requirement
.put(bufferForUint32(decision.new_state))
.build();
const officer_sig = encodeCrock(eddsaSign(sigBlob, key));
return {
...decision,
officer_sig,
};
}
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