Rebrand: polkadot → pezkuwi, substrate → bizinikiwi, kusama → dicle

packages/rpc-provider/src/coder/decodeResponse.spec.ts

@@ -0,0 +1,70 @@
+// Copyright 2017-2025 @pezkuwi/rpc-provider authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/// <reference types="@pezkuwi/dev-test/globals.d.ts" />
+
+import type { JsonRpcResponse } from '../types.js';
+
+import { RpcCoder } from './index.js';
+
+describe('decodeResponse', (): void => {
+  let coder: RpcCoder;
+
+  beforeEach((): void => {
+    coder = new RpcCoder();
+  });
+
+  it('expects a non-empty input object', (): void => {
+    expect(
+      () => coder.decodeResponse(undefined as unknown as JsonRpcResponse<unknown>)
+    ).toThrow(/Invalid jsonrpc/);
+  });
+
+  it('expects a valid jsonrpc field', (): void => {
+    expect(
+      () => coder.decodeResponse({} as JsonRpcResponse<unknown>)
+    ).toThrow(/Invalid jsonrpc/);
+  });
+
+  it('expects a valid id field', (): void => {
+    expect(
+      () => coder.decodeResponse({ jsonrpc: '2.0' } as JsonRpcResponse<unknown>)
+    ).toThrow(/Invalid id/);
+  });
+
+  it('expects a valid result field', (): void => {
+    expect(
+      () => coder.decodeResponse({ id: 1, jsonrpc: '2.0' } as JsonRpcResponse<unknown>)
+    ).toThrow(/No result/);
+  });
+
+  it('throws any error found', (): void => {
+    expect(
+      () => coder.decodeResponse({ error: { code: 123, message: 'test error' }, id: 1, jsonrpc: '2.0' } as JsonRpcResponse<unknown>)
+    ).toThrow(/123: test error/);
+  });
+
+  it('throws any error found, with data', (): void => {
+    expect(
+      () => coder.decodeResponse({ error: { code: 123, data: 'Error("Some random error description")', message: 'test error' }, id: 1, jsonrpc: '2.0' } as JsonRpcResponse<unknown>)
+    ).toThrow(/123: test error: Some random error description/);
+  });
+
+  it('allows for number subscription ids', (): void => {
+    expect(
+      coder.decodeResponse({ id: 1, jsonrpc: '2.0', method: 'test', params: { result: 'test result', subscription: 1 } } as JsonRpcResponse<unknown>)
+    ).toEqual('test result');
+  });
+
+  it('allows for string subscription ids', (): void => {
+    expect(
+      coder.decodeResponse({ id: 1, jsonrpc: '2.0', method: 'test', params: { result: 'test result', subscription: 'abc' } } as JsonRpcResponse<unknown>)
+    ).toEqual('test result');
+  });
+
+  it('returns the result', (): void => {
+    expect(
+      coder.decodeResponse({ id: 1, jsonrpc: '2.0', result: 'some result' } as JsonRpcResponse<unknown>)
+    ).toEqual('some result');
+  });
+});

packages/rpc-provider/src/coder/encodeJson.spec.ts

@@ -0,0 +1,20 @@
+// Copyright 2017-2025 @pezkuwi/rpc-provider authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/// <reference types="@pezkuwi/dev-test/globals.d.ts" />
+
+import { RpcCoder } from './index.js';
+
+describe('encodeJson', (): void => {
+  let coder: RpcCoder;
+
+  beforeEach((): void => {
+    coder = new RpcCoder();
+  });
+
+  it('encodes a valid JsonRPC JSON string', (): void => {
+    expect(
+      coder.encodeJson('method', ['params'])
+    ).toEqual([1, '{"id":1,"jsonrpc":"2.0","method":"method","params":["params"]}']);
+  });
+});

packages/rpc-provider/src/coder/encodeObject.spec.ts

@@ -0,0 +1,25 @@
+// Copyright 2017-2025 @pezkuwi/rpc-provider authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/// <reference types="@pezkuwi/dev-test/globals.d.ts" />
+
+import { RpcCoder } from './index.js';
+
+describe('encodeObject', (): void => {
+  let coder: RpcCoder;
+
+  beforeEach((): void => {
+    coder = new RpcCoder();
+  });
+
+  it('encodes a valid JsonRPC object', (): void => {
+    expect(
+      coder.encodeObject('method', ['a', 'b'])
+    ).toEqual([1, {
+      id: 1,
+      jsonrpc: '2.0',
+      method: 'method',
+      params: ['a', 'b']
+    }]);
+  });
+});

packages/rpc-provider/src/coder/error.spec.ts

@@ -0,0 +1,111 @@
+// Copyright 2017-2025 @pezkuwi/rpc-provider authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/// <reference types="@pezkuwi/dev-test/globals.d.ts" />
+
+import { isError } from '@pezkuwi/util';
+
+import RpcError from './error.js';
+
+describe('RpcError', (): void => {
+  describe('constructor', (): void => {
+    it('constructs an Error that is still an Error', (): void => {
+      expect(
+        isError(
+          new RpcError()
+        )
+      ).toEqual(true);
+    });
+  });
+
+  describe('static', (): void => {
+    it('exposes the .CODES as a static', (): void => {
+      expect(
+        Object.keys(RpcError.CODES)
+      ).not.toEqual(0);
+    });
+  });
+
+  describe('constructor properties', (): void => {
+    it('sets the .message property', (): void => {
+      expect(
+        new RpcError('test message').message
+      ).toEqual('test message');
+    });
+
+    it("sets the .message to '' when not set", (): void => {
+      expect(
+        new RpcError().message
+      ).toEqual('');
+    });
+
+    it('sets the .code property', (): void => {
+      expect(
+        new RpcError('test message', 1234).code
+      ).toEqual(1234);
+    });
+
+    it('sets the .code to UKNOWN when not set', (): void => {
+      expect(
+        new RpcError('test message').code
+      ).toEqual(RpcError.CODES.UNKNOWN);
+    });
+
+    it('sets the .data property', (): void => {
+      const data = 'here';
+
+      expect(
+        new RpcError('test message', 1234, data).data
+      ).toEqual(data);
+    });
+
+    it('sets the .data property to generic value', (): void => {
+      const data = { custom: 'value' } as const;
+
+      expect(
+        new RpcError('test message', 1234, data).data
+      ).toEqual(data);
+    });
+  });
+
+  describe('stack traces', (): void => {
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    let captureStackTrace: (targetObject: Record<string, any>, constructorOpt?: Function | undefined) => void;
+
+    beforeEach((): void => {
+      captureStackTrace = Error.captureStackTrace;
+
+      Error.captureStackTrace = function (error): void {
+        Object.defineProperty(error, 'stack', {
+          configurable: true,
+          get: function getStack (): string {
+            const value = 'some stack returned';
+
+            Object.defineProperty(this, 'stack', { value });
+
+            return value;
+          }
+        });
+      };
+    });
+
+    afterEach((): void => {
+      Error.captureStackTrace = captureStackTrace;
+    });
+
+    it('captures via captureStackTrace when available', (): void => {
+      expect(
+        new RpcError().stack
+      ).toEqual('some stack returned');
+    });
+
+    it('captures via stack when captureStackTrace not available', (): void => {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+      Error.captureStackTrace = null as any;
+
+      expect(
+        new RpcError().stack.length
+      ).not.toEqual(0);
+    });
+  });
+});

packages/rpc-provider/src/coder/error.ts

@@ -0,0 +1,66 @@
+// Copyright 2017-2025 @pezkuwi/rpc-provider authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { RpcErrorInterface } from '../types.js';
+
+import { isFunction } from '@pezkuwi/util';
+
+const UNKNOWN = -99999;
+
+function extend<Data, K extends keyof RpcError<Data>> (that: RpcError<Data>, name: K, value: RpcError<Data>[K]): void {
+  Object.defineProperty(that, name, {
+    configurable: true,
+    enumerable: false,
+    value
+  });
+}
+
+/**
+ * @name RpcError
+ * @summary Extension to the basic JS Error.
+ * @description
+ * The built-in JavaScript Error class is extended by adding a code to allow for Error categorization. In addition to the normal `stack`, `message`, the numeric `code` and `data` (any types) parameters are available on the object.
+ * @example
+ * <BR>
+ *
+ * ```javascript
+ * const { RpcError } from '@pezkuwi/util');
+ *
+ * throw new RpcError('some message', RpcError.CODES.METHOD_NOT_FOUND); // => error.code = -32601
+ * ```
+ */
+export default class RpcError<T = never> extends Error implements RpcErrorInterface<T> {
+  public code!: number;
+
+  public data?: T;
+
+  public override message!: string;
+
+  public override name!: string;
+
+  public override stack!: string;
+
+  public constructor (message = '', code: number = UNKNOWN, data?: T) {
+    super();
+
+    extend(this, 'message', String(message));
+    extend(this, 'name', this.constructor.name);
+    extend(this, 'data', data);
+    extend(this, 'code', code);
+
+    if (isFunction(Error.captureStackTrace)) {
+      Error.captureStackTrace(this, this.constructor);
+    } else {
+      const { stack } = new Error(message);
+
+      stack && extend(this, 'stack', stack);
+    }
+  }
+
+  public static CODES = {
+    ASSERT: -90009,
+    INVALID_JSONRPC: -99998,
+    METHOD_NOT_FOUND: -32601, // Rust client
+    UNKNOWN
+  };
+}

packages/rpc-provider/src/coder/index.ts

@@ -0,0 +1,88 @@
+// Copyright 2017-2025 @pezkuwi/rpc-provider authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { JsonRpcRequest, JsonRpcResponse, JsonRpcResponseBaseError } from '../types.js';
+
+import { isNumber, isString, isUndefined, stringify } from '@pezkuwi/util';
+
+import RpcError from './error.js';
+
+function formatErrorData (data?: string | number): string {
+  if (isUndefined(data)) {
+    return '';
+  }
+
+  const formatted = `: ${isString(data)
+    ? data.replace(/Error\("/g, '').replace(/\("/g, '(').replace(/"\)/g, ')').replace(/\(/g, ', ').replace(/\)/g, '')
+    : stringify(data)}`;
+
+  // We need some sort of cut-off here since these can be very large and
+  // very nested, pick a number and trim the result display to it
+  return formatted.length <= 256
+    ? formatted
+    : `${formatted.substring(0, 255)}…`;
+}
+
+function checkError (error?: JsonRpcResponseBaseError): void {
+  if (error) {
+    const { code, data, message } = error;
+
+    throw new RpcError(`${code}: ${message}${formatErrorData(data)}`, code, data);
+  }
+}
+
+/** @internal */
+export class RpcCoder {
+  #id = 0;
+
+  public decodeResponse <T> (response?: JsonRpcResponse<T>): T {
+    if (!response || response.jsonrpc !== '2.0') {
+      throw new Error('Invalid jsonrpc field in decoded object');
+    }
+
+    const isSubscription = !isUndefined(response.params) && !isUndefined(response.method);
+
+    if (
+      !isNumber(response.id) &&
+      (
+        !isSubscription || (
+          !isNumber(response.params.subscription) &&
+          !isString(response.params.subscription)
+        )
+      )
+    ) {
+      throw new Error('Invalid id field in decoded object');
+    }
+
+    checkError(response.error);
+
+    if (response.result === undefined && !isSubscription) {
+      throw new Error('No result found in jsonrpc response');
+    }
+
+    if (isSubscription) {
+      checkError(response.params.error);
+
+      return response.params.result;
+    }
+
+    return response.result;
+  }
+
+  public encodeJson (method: string, params: unknown[]): [number, string] {
+    const [id, data] = this.encodeObject(method, params);
+
+    return [id, stringify(data)];
+  }
+
+  public encodeObject (method: string, params: unknown[]): [number, JsonRpcRequest] {
+    const id = ++this.#id;
+
+    return [id, {
+      id,
+      jsonrpc: '2.0',
+      method,
+      params
+    }];
+  }
+}