createExpressMiddleware

createExpressMiddleware(options): RequestHandler<ParamsDictionary, any, any, ParsedQs, Record<string, any>>

Creates express middleware for a Tevm JSON-RPC server

Parameters

▪ options: object

▪ options.request: TevmJsonRpcRequestHandler

A request handler for the JSON-RPC requests

Returns

Example

import express from 'express'
import { createExpressMiddleware } from 'tevm/server'
import { createMemoryClient } from 'tevm'

const tevm = createMemoryClient()

const app = express()
app.use(express.json())
app.use(createExpressMiddleware({ request: tevm.request }))
app.listen(8080, () => console.log('listening on 8080'))

After creating an express server it can be interacted with using any JSON-RPC client including viem, ethers or the built in tevm client

import { createClient } from 'tevm/client'

const client = createClient({
 url: 'http://localhost:8080'
 })

 const blockNumber = await client.eth.getBlockNumber()
 const chainId = await client.eth.getChainId()

Source

packages/server/src/adapters/createExpressMiddleware.js:35

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