Skip to content

README.md

Latest commit

 

History

History
67 lines (43 loc) · 1.64 KB

README.md

File metadata and controls

67 lines (43 loc) · 1.64 KB

Smart Contract API Example

Example code for building your own Ethereum smart contract API in Node.js.

Setup

git clone git@github.com:compound-developers/api-guide-example.git cd api-guide-example npm install

config.json

The listed contract addresses and ABIs might be out of date. They can be confirmed here.

server.js

  1. Be sure to set an environment variable for the Ethereum wallet private key.
  2. Replace the HTTP Provider URL with your own. Infura provides free API keys.

const walletPrivateKey = process.env.walletPrivateKey; const web3 = new Web3('https://mainnet.infura.io/v3/_your_api_key_here_');

Running

node server.js

API Endpoint Example Calls

These are the possible calls that can be made with cURL.

curl localhost:3000/wallet-balance/eth/ curl localhost:3000/wallet-balance/ceth/ curl localhost:3000/supply/eth/9000 curl localhost:3000/protocol-balance/eth/ curl localhost:3000/redeem/eth/123

Here is an example of outputs for a series of API calls. The wallet started with 100 ETH.

curl localhost:3000/wallet-balance/eth/

100

curl localhost:3000/wallet-balance/ceth/

0

curl localhost:3000/supply/eth/5

OK

curl localhost:3000/protocol-balance/eth/

4.999999999885010676

curl localhost:3000/wallet-balance/eth/

94.99788632

curl localhost:3000/wallet-balance/ceth/

249.85542658

curl localhost:3000/redeem/eth/249.85542658

OK

curl localhost:3000/protocol-balance/eth/

0

curl localhost:3000/wallet-balance/ceth/

0

curl localhost:3000/wallet-balance/eth/

99.995909700269046879