feat: add signal to EIP1193RequestOptions

Author: deodad

src/actions/public/call.ts

@@ -92,6 +92,10 @@ export type CallParameters<
   factory?: Address | undefined
   /** Calldata to execute on the factory to deploy the contract. */
   factoryData?: Hex | undefined
+  /** Request options. */
+  requestOptions?:
+    | import('../../types/eip1193.js').EIP1193RequestOptions
+    | undefined
   /** State overrides for the call. */
   stateOverride?: StateOverride | undefined
 } & (
@@ -174,6 +178,7 @@ export async function call<chain extends Chain | undefined>(
     maxFeePerGas,
     maxPriorityFeePerGas,
     nonce,
+    requestOptions,
     to,
     value,
     stateOverride,
@@ -276,10 +281,13 @@ export async function call<chain extends Chain | undefined>(
       return base
     })()
 
-    const response = await client.request({
-      method: 'eth_call',
-      params,
-    })
+    const response = await client.request(
+      {
+        method: 'eth_call',
+        params,
+      },
+      requestOptions,
+    )
     if (response === '0x') return { data: undefined }
     return { data: response }
   } catch (err) {

src/actions/public/getBlock.ts

@@ -27,6 +27,10 @@ export type GetBlockParameters<
 > = {
   /** Whether or not to include transaction data in the response. */
   includeTransactions?: includeTransactions | undefined
+  /** Request options. */
+  requestOptions?:
+    | import('../../types/eip1193.js').EIP1193RequestOptions
+    | undefined
 } & (
   | {
       /** Hash of the block. */
@@ -99,6 +103,7 @@ export async function getBlock<
     blockNumber,
     blockTag = client.experimental_blockTag ?? 'latest',
     includeTransactions: includeTransactions_,
+    requestOptions,
   }: GetBlockParameters<includeTransactions, blockTag> = {},
 ): Promise<GetBlockReturnType<chain, includeTransactions, blockTag>> {
   const includeTransactions = includeTransactions_ ?? false
@@ -113,15 +118,15 @@ export async function getBlock<
         method: 'eth_getBlockByHash',
         params: [blockHash, includeTransactions],
       },
-      { dedupe: true },
+      { dedupe: true, ...requestOptions },
     )
   } else {
     block = await client.request(
       {
         method: 'eth_getBlockByNumber',
         params: [blockNumberHex || blockTag, includeTransactions],
       },
-      { dedupe: Boolean(blockNumberHex) },
+      { dedupe: Boolean(blockNumberHex), ...requestOptions },
     )
   }
 

src/clients/transports/http.test.ts

@@ -612,3 +612,81 @@ test('no url', () => {
   `,
   )
 })
+
+describe('request cancellation', () => {
+  test('cancels request with AbortSignal', async () => {
+    const server = await createHttpServer((_, res) => {
+      // Delay response to allow time for cancellation
+      setTimeout(() => {
+        res.writeHead(200, { 'Content-Type': 'application/json' })
+        res.end(JSON.stringify({ jsonrpc: '2.0', result: '0x1', id: 0 }))
+      }, 100)
+    })
+
+    const controller = new AbortController()
+    const transport = http(server.url)({})
+
+    // Cancel after 50ms (before server responds at 100ms)
+    setTimeout(() => controller.abort(), 50)
+
+    await expect(
+      transport.request(
+        { method: 'eth_blockNumber' },
+        { signal: controller.signal },
+      ),
+    ).rejects.toThrow()
+
+    await server.close()
+  })
+
+  test('successful request with signal', async () => {
+    const server = await createHttpServer((_, res) => {
+      res.writeHead(200, { 'Content-Type': 'application/json' })
+      res.end(JSON.stringify({ jsonrpc: '2.0', result: '0x1', id: 0 }))
+    })
+
+    const controller = new AbortController()
+    const transport = http(server.url)({})
+
+    const result = await transport.request(
+      { method: 'eth_blockNumber' },
+      { signal: controller.signal },
+    )
+
+    expect(result).toBe('0x1')
+    await server.close()
+  })
+
+  test('multiple requests with same controller', async () => {
+    const server = await createHttpServer((_, res) => {
+      setTimeout(() => {
+        res.writeHead(200, { 'Content-Type': 'application/json' })
+        res.end(JSON.stringify({ jsonrpc: '2.0', result: '0x1', id: 0 }))
+      }, 100)
+    })
+
+    const controller = new AbortController()
+    const transport = http(server.url)({})
+
+    // Start multiple requests
+    const promise1 = transport.request(
+      { method: 'eth_blockNumber' },
+      { signal: controller.signal },
+    )
+    const promise2 = transport.request(
+      {
+        method: 'eth_getBalance',
+        params: ['0x0000000000000000000000000000000000000000'],
+      },
+      { signal: controller.signal },
+    )
+
+    // Cancel after 50ms
+    setTimeout(() => controller.abort(), 50)
+
+    await expect(promise1).rejects.toThrow()
+    await expect(promise2).rejects.toThrow()
+
+    await server.close()
+  })
+})

src/clients/transports/http.ts

@@ -122,7 +122,7 @@ export function http<
         key,
         methods,
         name,
-        async request({ method, params }) {
+        async request({ method, params }, options) {
           const body = { method, params }
 
           const { schedule } = createBatchScheduler({
@@ -134,6 +134,9 @@ export function http<
             fn: (body: RpcRequest[]) =>
               rpcClient.request({
                 body,
+                fetchOptions: options?.signal
+                  ? { signal: options.signal }
+                  : undefined,
               }),
             sort: (a, b) => a.id - b.id,
           })
@@ -144,6 +147,9 @@ export function http<
               : [
                   await rpcClient.request({
                     body,
+                    fetchOptions: options?.signal
+                      ? { signal: options.signal }
+                      : undefined,
                   }),
                 ]
 

src/types/eip1193.ts

@@ -2031,6 +2031,8 @@ export type EIP1193RequestOptions = {
   retryDelay?: number | undefined
   /** The max number of times to retry. */
   retryCount?: number | undefined
+  /** AbortSignal to cancel the request. */
+  signal?: AbortSignal | undefined
   /** Unique identifier for the request. */
   uid?: string | undefined
 }

src/utils/buildRequest.test.ts

@@ -41,12 +41,13 @@ import { getHttpRpcClient } from './rpc/http.js'
 
 function request(url: string) {
   const httpClient = getHttpRpcClient(url)
-  return async ({ method, params }: any) => {
+  return async ({ method, params }: any, options?: any) => {
     const { error, result } = await httpClient.request({
       body: {
         method,
         params,
       },
+      fetchOptions: options?.signal ? { signal: options.signal } : undefined,
     })
     if (error)
       throw new RpcRequestError({
@@ -254,6 +255,79 @@ describe('args', () => {
   })
 })
 
+describe('options', () => {
+  test('passes signal to underlying request', async () => {
+    let receivedSignal: AbortSignal | undefined
+    const mockRequest = async (_args: any, options?: any) => {
+      receivedSignal = options?.signal
+      return 'success'
+    }
+
+    const controller = new AbortController()
+    const request_ = buildRequest(mockRequest)
+
+    await request_({ method: 'eth_blockNumber' }, { signal: controller.signal })
+
+    expect(receivedSignal).toBe(controller.signal)
+  })
+
+  test('passes other options alongside signal', async () => {
+    let receivedOptions: any
+    const mockRequest = async (_args: any, options?: any) => {
+      receivedOptions = options
+      return 'success'
+    }
+
+    const controller = new AbortController()
+    const request_ = buildRequest(mockRequest)
+
+    await request_(
+      { method: 'eth_blockNumber' },
+      {
+        signal: controller.signal,
+        retryCount: 1,
+        dedupe: true,
+      },
+    )
+
+    expect(receivedOptions).toEqual({ signal: controller.signal })
+  })
+
+  test('works without signal', async () => {
+    let receivedOptions: any
+    const mockRequest = async (_args: any, options?: any) => {
+      receivedOptions = options
+      return 'success'
+    }
+
+    const request_ = buildRequest(mockRequest)
+
+    await request_({ method: 'eth_blockNumber' }, { dedupe: true })
+
+    expect(receivedOptions).toBeUndefined()
+  })
+
+  test('prioritizes override options over initial options', async () => {
+    let receivedSignal: AbortSignal | undefined
+    const mockRequest = async (_args: any, options?: any) => {
+      receivedSignal = options?.signal
+      return 'success'
+    }
+
+    const controller1 = new AbortController()
+    const controller2 = new AbortController()
+
+    const request_ = buildRequest(mockRequest, { signal: controller1.signal })
+
+    await request_(
+      { method: 'eth_blockNumber' },
+      { signal: controller2.signal },
+    )
+
+    expect(receivedSignal).toBe(controller2.signal)
+  })
+})
+
 describe('behavior', () => {
   describe('error types', () => {
     test('BaseError', async () => {

src/utils/buildRequest.ts

@@ -113,16 +113,16 @@ export type RequestErrorType =
   | WithRetryErrorType
   | ErrorType
 
-export function buildRequest<request extends (args: any) => Promise<any>>(
-  request: request,
-  options: EIP1193RequestOptions = {},
-): EIP1193RequestFn {
-  return async (args, overrideOptions = {}) => {
+export function buildRequest<
+  request extends (args: any, options?: EIP1193RequestOptions) => Promise<any>,
+>(request: request, options: EIP1193RequestOptions = {}): EIP1193RequestFn {
+  return async (args, overrideOptions: EIP1193RequestOptions = {}) => {
     const {
       dedupe = false,
       methods,
       retryDelay = 150,
       retryCount = 3,
+      signal,
       uid,
     } = {
       ...options,
@@ -147,7 +147,7 @@ export function buildRequest<request extends (args: any) => Promise<any>>(
         withRetry(
           async () => {
             try {
-              return await request(args)
+              return await request(args, signal ? { signal } : undefined)
             } catch (err_) {
               const err = err_ as unknown as RpcError<
                 RpcErrorCode | ProviderRpcErrorCode