Multiple Porter URIs

demos/taco-demo/src/App.tsx

@@ -3,7 +3,6 @@ import {
   decrypt,
   domains,
   encrypt,
-  getPorterUri,
   initialize,
   ThresholdMessageKit,
   toHexString,
@@ -89,7 +88,7 @@ export default function App() {
       provider,
       domain,
       encryptedMessage,
-      getPorterUri(domain),
+      undefined,
       provider.getSigner(),
     );
 

demos/taco-nft-demo/src/App.tsx

@@ -3,7 +3,6 @@ import {
   decrypt,
   domains,
   encrypt,
-  getPorterUri,
   initialize,
   ThresholdMessageKit,
 } from '@nucypher/taco';
@@ -78,8 +77,8 @@ export default function App() {
       provider,
       domain,
       encryptedMessage,
-      getPorterUri(domain),
-      provider.getSigner(),
+      undefined,
+      provider.getSigner()
     );
 
     setDecryptedMessage(new TextDecoder().decode(decryptedMessage));

examples/taco/nextjs/src/hooks/useTaco.ts

@@ -4,7 +4,6 @@ import {
   Domain,
   EIP4361AuthProvider,
   encrypt,
-  getPorterUri,
   initialize,
   ThresholdMessageKit,
 } from '@nucypher/taco';
@@ -38,7 +37,6 @@ export default function useTaco({
         domain,
         messageKit,
         authProvider,
-        getPorterUri(domain),
       );
     },
     [isInit, provider, domain],

examples/taco/nodejs/src/index.ts

@@ -7,7 +7,6 @@ import {
   EIP4361AuthProvider,
   encrypt,
   fromBytes,
-  getPorterUri,
   initialize,
   isAuthorized,
   ThresholdMessageKit,
@@ -119,7 +118,6 @@ const decryptFromBytes = async (encryptedBytes: Uint8Array) => {
     domain,
     messageKit,
     authProvider,
-    getPorterUri(domain),
   );
 };
 

examples/taco/react/src/hooks/useTaco.ts

@@ -4,7 +4,6 @@ import {
   Domain,
   EIP4361AuthProvider,
   encrypt,
-  getPorterUri,
   initialize,
   ThresholdMessageKit,
 } from '@nucypher/taco';
@@ -38,7 +37,6 @@ export default function useTaco({
         domain,
         messageKit,
         authProvider,
-        getPorterUri(domain),
       );
     },
     [isInit, provider, domain],

examples/taco/webpack-5/src/index.ts

@@ -5,7 +5,7 @@ import {
   EIP4361AuthProvider,
   encrypt,
   fromBytes,
-  getPorterUri,
+  getPorterUris,
   initialize,
   toBytes,
 } from '@nucypher/taco';
@@ -67,7 +67,6 @@ const runExample = async () => {
     domain,
     messageKit,
     authProvider,
-    getPorterUri(domain),
   );
   const decryptedMessage = fromBytes(decryptedBytes);
   console.log('Decrypted message:', decryptedMessage);

packages/shared/package.json

@@ -51,6 +51,7 @@
     "zod": "*"
   },
   "devDependencies": {
+    "@nucypher/test-utils": "workspace:*",
     "@typechain/ethers-v5": "^11.1.2",
     "@types/deep-equal": "^1.0.3",
     "@types/qs": "^6.9.15",

packages/shared/src/porter.ts

@@ -6,20 +6,23 @@ import {
   RetrievalKit,
   TreasureMap,
 } from '@nucypher/nucypher-core';
-import axios, { AxiosResponse } from 'axios';
+import axios, {
+  AxiosRequestConfig,
+  AxiosResponse,
+  HttpStatusCode,
+} from 'axios';
 import qs from 'qs';
 
 import { Base64EncodedBytes, ChecksumAddress, HexEncodedBytes } from './types';
 import { fromBase64, fromHexString, toBase64, toHexString } from './utils';
 
-const porterUri: Record<string, string> = {
+const defaultPorterUri: Record<string, string> = {
   mainnet: 'https://porter.nucypher.community',
   tapir: 'https://porter-tapir.nucypher.community',
-  oryx: 'https://porter-oryx.nucypher.community',
   lynx: 'https://porter-lynx.nucypher.community',
 };
 
-export type Domain = keyof typeof porterUri;
+export type Domain = keyof typeof defaultPorterUri;
 
 export const domains: Record<string, Domain> = {
   DEVNET: 'lynx',
@@ -28,11 +31,20 @@ export const domains: Record<string, Domain> = {
 };
 
 export const getPorterUri = (domain: Domain): string => {
-  const uri = porterUri[domain];
+  return getPorterUris(domain)[0];
+};
+
+export const getPorterUris = (
+  domain: Domain,
+  porterUris: string[] = [],
+): string[] => {
+  const fullList = [...porterUris];
+  const uri = defaultPorterUri[domain];
   if (!uri) {
     throw new Error(`No default Porter URI found for domain: ${domain}`);
   }
-  return porterUri[domain];
+  fullList.push(uri);
+  return fullList;
 };
 
 // /get_ursulas
@@ -120,10 +132,39 @@ export type TacoDecryptResult = {
 };
 
 export class PorterClient {
-  readonly porterUrl: URL;
+  readonly porterUrls: URL[];
 
-  constructor(porterUri: string) {
-    this.porterUrl = new URL(porterUri);
+  constructor(porterUris: string | string[]) {
+    if (porterUris instanceof Array) {
+      this.porterUrls = porterUris.map((uri) => new URL(uri));
+    } else {
+      this.porterUrls = [new URL(porterUris)];
+    }
+  }
+
+  protected async tryAndCall<T, D>(
+    config: AxiosRequestConfig<D>,
+  ): Promise<AxiosResponse<T>> {
+    let resp!: AxiosResponse<T>;
+    let lastError = undefined;
+    for (const porterUrl of this.porterUrls) {
+      const localConfig = { ...config, baseURL: porterUrl.toString() };
+      try {
+        resp = await axios.request(localConfig);
+      } catch (e) {
+        lastError = e;
+        continue;
+      }
+      if (resp.status === HttpStatusCode.Ok) {
+        return resp;
+      }
+    }
+    if (lastError !== undefined) {
+      throw lastError;
+    }
+    throw new Error(
+      'Porter returns bad response: ${resp.status} - ${resp.data}',
+    );
   }
 
   public async getUrsulas(
@@ -136,15 +177,14 @@ export class PorterClient {
       exclude_ursulas: excludeUrsulas,
       include_ursulas: includeUrsulas,
     };
-    const resp: AxiosResponse<GetUrsulasResult> = await axios.get(
-      new URL('/get_ursulas', this.porterUrl).toString(),
-      {
-        params,
-        paramsSerializer: (params) => {
-          return qs.stringify(params, { arrayFormat: 'comma' });
-        },
+    const resp: AxiosResponse<GetUrsulasResult> = await this.tryAndCall({
+      url: '/get_ursulas',
+      method: 'get',
+      params: params,
+      paramsSerializer: (params) => {
+        return qs.stringify(params, { arrayFormat: 'comma' });
       },
-    );
+    });
     return resp.data.result.ursulas.map((u: UrsulaResponse) => ({
       checksumAddress: u.checksum_address,
       uri: u.uri,
@@ -170,10 +210,12 @@ export class PorterClient {
       bob_verifying_key: toHexString(bobVerifyingKey.toCompressedBytes()),
       context: conditionContextJSON,
     };
-    const resp: AxiosResponse<PostRetrieveCFragsResponse> = await axios.post(
-      new URL('/retrieve_cfrags', this.porterUrl).toString(),
-      data,
-    );
+    const resp: AxiosResponse<PostRetrieveCFragsResponse> =
+      await this.tryAndCall({
+        url: '/retrieve_cfrags',
+        method: 'post',
+        data: data,
+      });
 
     return resp.data.result.retrieval_results.map(({ cfrags, errors }) => {
       const parsed = Object.keys(cfrags).map((address) => [
@@ -198,10 +240,11 @@ export class PorterClient {
       ),
       threshold,
     };
-    const resp: AxiosResponse<PostTacoDecryptResponse> = await axios.post(
-      new URL('/decrypt', this.porterUrl).toString(),
-      data,
-    );
+    const resp: AxiosResponse<PostTacoDecryptResponse> = await this.tryAndCall({
+      url: '/decrypt',
+      method: 'post',
+      data: data,
+    });
 
     const { encrypted_decryption_responses, errors } =
       resp.data.result.decryption_results;

packages/shared/test/porter.test.ts

@@ -0,0 +1,97 @@
+import { fakeUrsulas } from '@nucypher/test-utils';
+import axios, { HttpStatusCode } from 'axios';
+import { SpyInstance, beforeAll, describe, expect, it, vi } from 'vitest';
+import {
+  GetUrsulasResult,
+  PorterClient,
+  Ursula,
+  initialize,
+  toHexString,
+} from '../src';
+
+const fakePorterUris = [
+  'https://_this_should_crash.com/',
+  'https://2_this_should_crash.com/',
+  'https://_this_should_work.com/',
+];
+
+const mockGetUrsulas = (ursulas: Ursula[] = fakeUrsulas()): SpyInstance => {
+  const fakePorterUrsulas = (
+    mockUrsulas: readonly Ursula[],
+  ): GetUrsulasResult => {
+    return {
+      result: {
+        ursulas: mockUrsulas.map(({ encryptingKey, uri, checksumAddress }) => ({
+          encrypting_key: toHexString(encryptingKey.toCompressedBytes()),
+          uri: uri,
+          checksum_address: checksumAddress,
+        })),
+      },
+      version: '5.2.0',
+    };
+  };
+
+  return vi.spyOn(axios, 'request').mockImplementation(async (config) => {
+    switch (config.baseURL) {
+      case fakePorterUris[2]:
+        return Promise.resolve({
+          status: HttpStatusCode.Ok,
+          data: fakePorterUrsulas(ursulas),
+        });
+      case fakePorterUris[0]:
+        throw new Error();
+      default:
+        throw Promise.resolve({ status: HttpStatusCode.BadRequest });
+    }
+  });
+};
+
+describe('PorterClient', () => {
+  beforeAll(async () => {
+    await initialize();
+  });
+
+  it('should work when at least one ursula URI is valid', async () => {
+    const ursulas = fakeUrsulas();
+    const getUrsulasSpy = mockGetUrsulas(ursulas);
+    const porterClient = new PorterClient(fakePorterUris);
+    const result = await porterClient.getUrsulas(ursulas.length);
+
+    expect(
+      result.every((u: Ursula, index: number) => {
+        const expectedUrsula = ursulas[index];
+        return (
+          u.checksumAddress === expectedUrsula.checksumAddress &&
+          u.uri === expectedUrsula.uri &&
+          u.encryptingKey.equals(expectedUrsula.encryptingKey)
+        );
+      }),
+    ).toBeTruthy();
+    const params = {
+      method: 'get',
+      url: '/get_ursulas',
+      params: {
+        exclude_ursulas: [],
+        include_ursulas: [],
+        quantity: ursulas.length,
+      },
+    };
+
+    expect(getUrsulasSpy).toBeCalledTimes(fakePorterUris.length);
+    fakePorterUris.forEach((value, index) => {
+      expect(getUrsulasSpy).toHaveBeenNthCalledWith(
+        index + 1,
+        expect.objectContaining({ ...params, baseURL: value }),
+      );
+    });
+  });
+
+  it('returns error in case all porters fail', async () => {
+    const ursulas = fakeUrsulas();
+    mockGetUrsulas(ursulas);
+    let porterClient = new PorterClient([fakePorterUris[0], fakePorterUris[1]]);
+    expect(porterClient.getUrsulas(ursulas.length)).rejects.toThrowError();
+    porterClient = new PorterClient([fakePorterUris[1], fakePorterUris[0]]);
+    expect(porterClient.getUrsulas(ursulas.length)).rejects.toThrowError();
+  });
+});

packages/shared/tsconfig.json

@@ -6,4 +6,9 @@
     "skipLibCheck": true,
     "resolveJsonModule": true,
   },
+  "references": [
+    {
+      "path": "../test-utils/tsconfig.es.json",
+    },
+  ],
 }

packages/taco/examples/encrypt-decrypt.ts

@@ -7,7 +7,6 @@ import {
   domains,
   EIP4361AuthProvider,
   encrypt,
-  getPorterUri,
   initialize,
   ThresholdMessageKit,
   toBytes,
@@ -55,7 +54,6 @@ const run = async () => {
       domains.TESTNET,
       messageKit,
       authProvider,
-      getPorterUri(domains.TESTNET),
     );
     return decryptedMessage;
   };

packages/taco/src/index.ts

@@ -3,7 +3,7 @@ export {
   Domain,
   domains,
   fromBytes,
-  getPorterUri,
+  getPorterUris,
   initialize,
   toBytes,
   toHexString,