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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,203 @@ | ||
| import type { | ||
| CancelFunction, | ||
| JSONValue, | ||
| ModuleKind, | ||
| RpcRequest, | ||
| RpcResponse, | ||
| RpcRequestFull, | ||
| RpcResponseFull, | ||
| } from './types' | ||
| import { logger } from './utils/logger' | ||
|
|
||
| export interface RpcTransport { | ||
| sendRequest(request: RpcRequestFull): void | ||
| destroy(): void | ||
| } | ||
|
|
||
| export interface RpcTransportInit { | ||
| init(onRpcResponse: (response: RpcResponseFull) => void): Promise<RpcTransport> | ||
| } | ||
|
|
||
| // Handles communication with the wasm worker | ||
| // TODO: Move rpc stream management to a separate "SubscriptionManager" class | ||
| export class RpcClient { | ||
| private transport?: RpcTransport | ||
| private transportInit: RpcTransportInit | ||
| private requestCounter = 0 | ||
| private requestCallbacks = new Map<number, (response: RpcResponse) => void>() | ||
| private initPromise?: Promise<void> | ||
| private clientName: string | undefined | ||
|
|
||
| constructor(transportInit: RpcTransportInit) { | ||
| this.transportInit = transportInit | ||
| } | ||
|
|
||
| private async initializeInner(): Promise<void> { | ||
| this.transport = await this.transportInit.init( | ||
| this.handleWorkerMessage.bind(this) | ||
| ) | ||
| } | ||
|
|
||
| async initialize() { | ||
| if (this.initPromise) { | ||
| return this.initPromise | ||
| } | ||
|
|
||
| this.initPromise = this.initializeInner() | ||
| return this.initPromise | ||
| } | ||
|
|
||
| private handleWorkerMessage = (response: RpcResponseFull) => { | ||
| const callback = this.requestCallbacks.get(response.request_id) | ||
|
|
||
| if (callback) { | ||
| callback(response) | ||
| } else { | ||
| logger.warn( | ||
| 'RpcClient - handleWorkerMessage - received message with no callback', | ||
| response.request_id, | ||
| response | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| async joinFederation(inviteCode: string, clientName: string) { | ||
| await this.internalRpcSingle({ | ||
| type: 'join_federation', | ||
| invite_code: inviteCode, | ||
| client_name: clientName | ||
| }) | ||
| } | ||
|
|
||
| async openClient(clientName: string) { | ||
| await this.internalRpcSingle({ | ||
| type: 'open_client', | ||
| client_name: clientName | ||
| }) | ||
| this.clientName = clientName | ||
| } | ||
|
|
||
| async closeClient(clientName: string) { | ||
| await this.internalRpcSingle({ | ||
| type: 'close_client', | ||
| client_name: clientName | ||
| }) | ||
| this.clientName = undefined | ||
| } | ||
|
|
||
| private internalRpcStream<Response extends JSONValue = JSONValue>( | ||
| request: RpcRequest, | ||
| onData: (data: Response) => void, | ||
| onError: (error: string) => void, | ||
| onEnd: () => void = () => {}, | ||
| ): CancelFunction { | ||
| const requestId = ++this.requestCounter | ||
| logger.debug('RpcClient - rpcStream', requestId, request) | ||
| let unsubscribe = () => { | ||
| const cancelRequest: RpcRequestFull = { | ||
| request_id: ++this.requestCounter, | ||
| type: 'cancel_rpc', | ||
| cancel_request_id: requestId | ||
| } | ||
| this.transport?.sendRequest(cancelRequest) | ||
| } | ||
|
|
||
| const requestFull: RpcRequestFull = { | ||
| ...request, | ||
| request_id: requestId, | ||
| } | ||
|
|
||
| this.requestCallbacks.set(requestId, (response: RpcResponse) => { | ||
| switch (response.type) { | ||
| case 'data': | ||
| onData(response.data) | ||
| break | ||
| case 'error': | ||
| onError(response.error) | ||
| break | ||
| case 'end': | ||
| this.requestCallbacks.delete(requestId) | ||
| onEnd() | ||
| break | ||
| case 'aborted': | ||
| this.requestCallbacks.delete(requestId) | ||
| onEnd() | ||
| break | ||
| } | ||
| }) | ||
| this.transport?.sendRequest(requestFull) | ||
| return unsubscribe | ||
| } | ||
|
|
||
| private internalRpcSingle<T extends JSONValue = JSONValue>(request: RpcRequest): Promise<T> { | ||
| return new Promise((resolve, reject) => { | ||
| const unsubscribe = this.internalRpcStream( | ||
| request, | ||
| (data) => resolve(data as T), | ||
| (error) => reject(new Error(error)), | ||
| () => {} | ||
| ) | ||
| // No need to unsubscribe for single requests as they auto-complete | ||
| }) | ||
| } | ||
|
|
||
| rpcStream< | ||
| Response extends JSONValue = JSONValue, | ||
| Body extends JSONValue = JSONValue, | ||
| >( | ||
| module: ModuleKind, | ||
| method: string, | ||
| body: Body, | ||
| onData: (data: Response) => void, | ||
| onError: (error: string) => void, | ||
| onEnd: () => void = () => {}, | ||
| ): CancelFunction { | ||
| if (this.clientName === undefined) { | ||
| throw new Error('Wallet is not open') | ||
| } | ||
| return this.internalRpcStream( | ||
| { | ||
| type: 'client_rpc', | ||
| client_name: this.clientName, | ||
| module, | ||
| method, | ||
| payload: body, | ||
| }, | ||
| onData, | ||
| onError, | ||
| onEnd | ||
| ) | ||
| } | ||
|
|
||
| rpcSingle<T extends JSONValue = JSONValue, P extends JSONValue = JSONValue>( | ||
| module: string, | ||
| method: string, | ||
| payload: P, | ||
| ): Promise<T> { | ||
| if (this.clientName === undefined) { | ||
| throw new Error('Wallet is not open') | ||
| } | ||
| return this.internalRpcSingle<T>({ | ||
| type: 'client_rpc', | ||
| client_name: this.clientName, | ||
| module, | ||
| method, | ||
| payload | ||
| }) | ||
| } | ||
|
|
||
| async cleanup() { | ||
| this.transport?.destroy() | ||
| this.requestCounter = 0 | ||
| this.initPromise = undefined | ||
| this.requestCallbacks.clear() | ||
| } | ||
|
|
||
| // For Testing | ||
| _getRequestCounter() { | ||
| return this.requestCounter | ||
| } | ||
| _getRequestCallbackMap() { | ||
| return this.requestCallbacks | ||
| } | ||
| } |
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