eth-json-rpc-middleware
Advanced tools
The eth-json-rpc-middleware package provides a collection of middleware functions for handling JSON-RPC requests in Ethereum-based applications. It is designed to be used with JSON-RPC servers to process and manage Ethereum JSON-RPC requests efficiently.
createScaffoldMiddleware
The createScaffoldMiddleware function allows you to create a middleware that scaffolds specific JSON-RPC methods with predefined responses. In this example, the middleware responds with a fixed block number for the eth_blockNumber method.
const { createScaffoldMiddleware } = require('eth-json-rpc-middleware');
const scaffoldMiddleware = createScaffoldMiddleware({
eth_blockNumber: async (req, res, next, end) => {
res.result = '0x1b4'; // Example block number
end();
}
});createBlockRefRewriteMiddleware
The createBlockRefRewriteMiddleware function creates middleware that rewrites block reference parameters in JSON-RPC requests. This example sets the block reference to 'latest' for all requests.
const { createBlockRefRewriteMiddleware } = require('eth-json-rpc-middleware');
const blockRefRewriteMiddleware = createBlockRefRewriteMiddleware({
blockRef: 'latest'
});createRetryOnEmptyMiddleware
The createRetryOnEmptyMiddleware function creates middleware that retries JSON-RPC requests if the response is empty. This example configures the middleware to retry up to three times.
const { createRetryOnEmptyMiddleware } = require('eth-json-rpc-middleware');
const retryOnEmptyMiddleware = createRetryOnEmptyMiddleware({
retryCount: 3
});web3-provider-engine is a tool for composing Ethereum provider middleware. It allows you to create custom providers by combining various middleware components. Compared to eth-json-rpc-middleware, web3-provider-engine offers a more extensive set of middleware options and is widely used in the Ethereum ecosystem.
json-rpc-engine is a framework for building JSON-RPC servers and clients. It provides a flexible way to compose middleware for handling JSON-RPC requests. While eth-json-rpc-middleware focuses specifically on Ethereum JSON-RPC methods, json-rpc-engine is more general-purpose and can be used for any JSON-RPC-based application.
eth-rpc-errors is a package for creating and handling Ethereum JSON-RPC errors. It provides a set of standard error codes and utilities for managing errors in Ethereum JSON-RPC applications. Unlike eth-json-rpc-middleware, which focuses on middleware for handling requests, eth-rpc-errors is specialized in error management.
Ethereum-related middleware for json-rpc-engine.
See tests for usage details.
yarn test
FAQs
Ethereum-related json-rpc-engine middleware.
The npm package eth-json-rpc-middleware receives a total of 55,896 weekly downloads. As such, eth-json-rpc-middleware popularity was classified as popular.
We found that eth-json-rpc-middleware demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 7 open source maintainers collaborating on the project.
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