Introduction

You can use Web3j-OpenAPI to generate API endpoints based on your Solidity smart contract.

You can then run the generated API server with and send requests to your deployed smart contract.

Step-by-step

Deploy an Ethereum or Quorum node with Chainstack

Deploy an Ethereum node as described in Join a public network.

Deploy a Quorum network as described in Deploy a Quorum network.

Run Web3j-OpenAPI based on your smart contract

Refer to the Web3j-OpenAPI documentation.

Sample walkthrough

Install Epirus CLI:

curl -L get.epirus.io | sh

Import your smart contract into the Epirus project:

epirus openapi import

Provide a path to your smart contract:

Please enter the path to your Solidity file/folder [Required Field]: 
/user/project/contract/

Get your RPC endpoint. See View node access and credentials.

Provide the variables to interact with the contract and the network:

export WEB3J_ENDPOINT=RPC_ENDPOINT
export WEB3J_PRIVATE_KEY=PRIVATE_KEY
export WEB3J_OPENAPI_HOST=localhost
export WEB3J_OPENAPI_PORT=9090

where

• RPC_ENDPOINT — the link to your node's RPC endpoint.
• PRIVATE_KEY — the private key of an account through which you interact with the contract, including contract deployment.

Run the API server:

./gradlew run

Access the server at http://localhost:9090/swagger-ui 

If you have any questions, feel free to contact Chainstack support by emailing support@chainstack.com or by submitting this form.