feat: js local resolver

.vscode/settings.json

@@ -1,6 +1,9 @@
 {
   "rust-analyzer.cargo.target": "wasm32-unknown-unknown",
   "rust-analyzer.cargo.features": [],
+  "rust-analyzer.cargo.extraEnv": {
+    "PROTOC":"/opt/homebrew/bin/protoc"
+  },
   "protoc": {
     "options": ["-I/${workspaceRoot}/confidence-resolver/protos"]
   }

confidence-resolver/protos/confidence/flags/admin/v1/resolver.proto

@@ -56,6 +56,8 @@ message ResolverStateUriResponse {
   string signed_uri = 1;
   // At what time the state uri expires
   google.protobuf.Timestamp expire_time = 2;
+  // The account the referenced state belongs to
+  string account = 3;
 }
 
 // Request to get the resolver state for the whole account

openfeature-provider/js/.editorconfig

@@ -0,0 +1,10 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.{js,json,yml}]
+charset = utf-8
+indent_style = space
+indent_size = 2

openfeature-provider/js/.gitattributes

@@ -0,0 +1,4 @@
+/.yarn/**            linguist-vendored
+/.yarn/releases/*    binary
+/.yarn/plugins/**/*  binary
+/.pnp.*              binary linguist-generated

openfeature-provider/js/.gitignore

@@ -0,0 +1,10 @@
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+node_modules/
+src/proto/
+dist/
+.env.test

openfeature-provider/js/.yarnrc.yml

@@ -0,0 +1 @@
+nodeLinker: node-modules

openfeature-provider/js/README.md

@@ -0,0 +1 @@
+# js

openfeature-provider/js/package.json

@@ -0,0 +1,54 @@
+{
+  "name": "@spotify-confidence/openfeature-server-provider-local",
+  "version": "0.0.0",
+  "private": true,
+  "description": "Spotify Condfidence Open Feature provider",
+  "type": "module",
+  "files": [
+    "dist"
+  ],
+  "main": "./dist/index.node.js",
+  "module": "./dist/index.browser.js",
+  "types": "./dist/index.node.d.ts",
+  "exports": {
+    ".": {
+      "node": {
+        "types": "./dist/index.node.d.ts",
+        "default": "./dist/index.node.js"
+      },
+      "browser": {
+        "types": "./dist/index.browser.d.ts",
+        "default": "./dist/index.browser.js"
+      },
+      "default": {
+        "types": "./dist/index.node.d.ts",
+        "default": "./dist/index.node.js"
+      }
+    },
+    "./package.json": "./package.json"
+  },
+  "scripts": {
+    "build": "tsdown",
+    "dev": "tsdown --watch",
+    "test": "vitest",
+    "proto:gen": "rm -rf src/proto && mkdir -p src/proto && protoc --plugin=node_modules/.bin/protoc-gen-ts_proto --ts_proto_opt useOptionals=messages --ts_proto_opt esModuleInterop=true --ts_proto_out src/proto -Iproto api.proto messages.proto"
+  },
+  "dependencies": {
+    "loglevel": "^1.9.2"
+  },
+  "devDependencies": {
+    "@openfeature/core": "^1.9.0",
+    "@openfeature/server-sdk": "^1.19.0",
+    "@types/node": "^24.0.1",
+    "@vitest/coverage-v8": "^3.2.4",
+    "dotenv": "^17.2.2",
+    "rolldown": "1.0.0-beta.38",
+    "ts-proto": "^2.7.3",
+    "tsdown": "latest",
+    "vitest": "^3.2.4"
+  },
+  "peerDependencies": {
+    "@openfeature/server-sdk": "^1.19.0"
+  },
+  "packageManager": "yarn@4.6.0"
+}

openfeature-provider/js/proto/api.proto

@@ -0,0 +1,92 @@
+syntax = "proto3";
+
+import "google/protobuf/struct.proto";
+import "google/protobuf/timestamp.proto";
+
+message ResolveFlagsRequest {
+  // If non-empty, the specific flags are resolved, otherwise all flags
+  // available to the client will be resolved.
+  repeated string flags = 1;
+
+  // An object that contains data used in the flag resolve. For example,
+  // the targeting key e.g. the id of the randomization unit, other attributes
+  // like country or version that are used for targeting.
+  google.protobuf.Struct evaluation_context = 2;
+
+  // Credentials for the client. It is used to identify the client and find
+  // the flags that are available to it.
+  string client_secret = 3;
+
+  // Determines whether the flags should be applied directly as part of the
+  // resolve, or delayed until `ApplyFlag` is called. A flag is typically
+  // applied when it is used, if this occurs much later than the resolve, then
+  // `apply` should likely be set to false.
+  bool apply = 4;
+
+  // Information about the SDK used to initiate the request.
+  // Sdk sdk = 5;
+}
+
+message ResolveFlagsResponse {
+  // The list of all flags that could be resolved. Note: if any flag was
+  // archived it will not be included in this list.
+  repeated ResolvedFlag resolved_flags = 1;
+
+  // An opaque token that is used when `apply` is set to false in `ResolveFlags`.
+  // When `apply` is set to false, the token must be passed to `ApplyFlags`.
+  bytes resolve_token = 2;
+
+  // Unique identifier for this particular resolve request.
+  string resolve_id = 3;
+}
+
+
+message ResolvedFlag {
+  // The id of the flag that as resolved.
+  string flag = 1;
+
+  // The id of the resolved variant has the format `flags/abc/variants/xyz`.
+  string variant = 2;
+
+  // The value corresponding to the variant. It will always be a json object,
+  // for example `{ "color": "red", "size": 12 }`.
+  google.protobuf.Struct value = 3;
+
+  // The schema of the value that was returned. For example:
+  // ```
+  // {
+  //    "schema": {
+  //      "color": { "stringSchema": {} },
+  //      "size": { "intSchema": {} }
+  //    }
+  // }
+  // ```
+  // types.v1.FlagSchema.StructFlagSchema flag_schema = 4;
+
+  // The reason to why the flag could be resolved or not.
+  ResolveReason reason = 5;
+}
+
+
+enum ResolveReason {
+  // Unspecified enum.
+  RESOLVE_REASON_UNSPECIFIED = 0;
+  // The flag was successfully resolved because one rule matched.
+  RESOLVE_REASON_MATCH = 1;
+  // The flag could not be resolved because no rule matched.
+  RESOLVE_REASON_NO_SEGMENT_MATCH = 2;
+  // The flag could not be resolved because the matching rule had no variant
+  // that could be assigned.
+  RESOLVE_REASON_NO_TREATMENT_MATCH = 3 [deprecated = true];
+  // The flag could not be resolved because it was archived.
+  RESOLVE_REASON_FLAG_ARCHIVED = 4;
+  // The flag could not be resolved because the targeting key field was invalid
+  RESOLVE_REASON_TARGETING_KEY_ERROR = 5;
+  // Unknown error occurred during the resolve
+  RESOLVE_REASON_ERROR = 6;
+}
+
+message SetResolverStateRequest {
+  bytes state = 1;
+  string account_id = 2;
+}

openfeature-provider/js/proto/messages.proto

@@ -0,0 +1,14 @@
+syntax = "proto3";
+
+message Void {}
+
+message Request {
+    bytes data = 1;
+}
+
+message Response {
+    oneof result {
+        bytes data = 1;
+        string error = 2;
+    }
+}

openfeature-provider/js/src/ConfidenceServerProviderLocal.e2e.test.ts

@@ -0,0 +1,100 @@
+import { afterAll, beforeAll, describe, expect, it } from 'vitest';
+import { OpenFeature } from '@openfeature/server-sdk';
+import { ConfidenceServerProviderLocal } from './ConfidenceServerProviderLocal';
+import { readFileSync } from 'node:fs';
+import { WasmResolver } from './WasmResolver';
+// import log from 'loglevel';
+// log.setLevel("debug");
+
+const {
+  CONFIDENCE_API_CLIENT_ID,
+  CONFIDENCE_API_CLIENT_SECRET, 
+} = requireEnv('CONFIDENCE_API_CLIENT_ID', 'CONFIDENCE_API_CLIENT_SECRET');
+
+const moduleBytes = readFileSync(__dirname + '/../../../wasm/confidence_resolver.wasm');
+const module = new WebAssembly.Module(moduleBytes);
+const resolver = await WasmResolver.load(module);
+const confidenceProvider = new ConfidenceServerProviderLocal(resolver, {
+  flagClientSecret: 'RxDVTrXvc6op1XxiQ4OaR31dKbJ39aYV',
+  apiClientId: CONFIDENCE_API_CLIENT_ID,
+  apiClientSecret: CONFIDENCE_API_CLIENT_SECRET
+});
+
+describe('ConfidenceServerProvider E2E tests', () => {
+  beforeAll( async () => {
+
+    await OpenFeature.setProviderAndWait(confidenceProvider);
+    OpenFeature.setContext({
+      targetingKey: 'test-a', // control
+    });
+  });
+
+  afterAll(() => OpenFeature.close())
+
+  it('should resolve a boolean e2e', async () => {
+    const client = OpenFeature.getClient();
+
+    expect(await client.getBooleanValue('web-sdk-e2e-flag.bool', true)).toBeFalsy();
+  });
+
+  it('should resolve an int', async () => {
+    const client = OpenFeature.getClient();
+
+    expect(await client.getNumberValue('web-sdk-e2e-flag.int', 10)).toEqual(3);
+  });
+
+  it('should resolve a double', async () => {
+    const client = OpenFeature.getClient();
+
+    expect(await client.getNumberValue('web-sdk-e2e-flag.double', 10)).toEqual(3.5);
+  });
+
+  it('should resolve a string', async () => {
+    const client = OpenFeature.getClient();
+
+    expect(await client.getStringValue('web-sdk-e2e-flag.str', 'default')).toEqual('control');
+  });
+
+  it('should resolve a struct', async () => {
+    const client = OpenFeature.getClient();
+    const expectedObject = {
+      int: 4,
+      str: 'obj control',
+      bool: false,
+      double: 3.6,
+      ['obj-obj']: {},
+    };
+
+    expect(await client.getObjectValue('web-sdk-e2e-flag.obj', {})).toEqual(expectedObject);
+  });
+
+  it('should resolve a sub value from a struct', async () => {
+    const client = OpenFeature.getClient();
+
+    expect(await client.getBooleanValue('web-sdk-e2e-flag.obj.bool', true)).toBeFalsy();
+  });
+
+  it('should resolve a sub value from a struct with details with resolve token for client side apply call', async () => {
+    const client = OpenFeature.getClient();
+    const expectedObject = {
+      flagKey: 'web-sdk-e2e-flag.obj.double',
+      reason: 'MATCH',
+      variant: 'flags/web-sdk-e2e-flag/variants/control',
+      flagMetadata: {},
+      value: 3.6,
+    };
+
+    expect(await client.getNumberDetails('web-sdk-e2e-flag.obj.double', 1)).toEqual(expectedObject);
+  });
+});
+
+function requireEnv<const N extends string[]>(...names:N): Record<N[number],string> {
+  return names.reduce((acc, name) => {
+    const value = process.env[name];
+    if(!value) throw new Error(`Missing environment variable ${name}`)
+    return {
+      ...acc,
+      [name]: value
+    };
+  }, {}) as Record<N[number],string>;
+}