Etherproxy

Etherproxy is a JSON-RPC reverse proxy tool designed for caching requests.

Usage

npx etherproxy --port 9000 --target https://gno.getblock.io/YOUR_TOKEN/mainnet/ --expiry 2000

The command above starts the JSON-RPC reverse proxy...

• on port 9000 (--port)
• forwarding all requests to GetBlock using your token and mainnet (--target)
• grouping requests together within 2 seconds (--expiry)

Make sure to replace YOUR_TOKEN with your actual token.

Verify the tool is running

Execute the curl command shown below repeatedly and inspect the logs of Etherproxy.

curl http://localhost:9000 -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

When the text Cache hit appears, it indicates that a request was saved and immediately returned:

Key: {"jsonrpc":"2.0","method":"eth_blockNumber","params":[]}
Cache hit: {"jsonrpc":"2.0","method":"eth_blockNumber","params":[]}
Cache hit: {"jsonrpc":"2.0","method":"eth_blockNumber","params":[]}
Cache hit: {"jsonrpc":"2.0","method":"eth_blockNumber","params":[]}

Benefits

Etherproxy provides several benefits in multi-node scenarios. For instance, requests such as eth_blockNumber and eth_getLogs are frequently called, sometimes generating many unnecessary requests. By using a reverse proxy, the same requests made within a small time period are grouped together and sent to your JSON-RPC endpoint only once.

As a result, all local nodes receive identical correct responses, and the number of actual requests sent is significantly reduced, which helps to preserve your request quota in case of a paid third-party, or reduce the load when you run your own Ethereum node.

Error handling

Whenever an error is thrown, Etherproxy responds with a 503 Service Unavailable status.