Message Storage

The purpose of this smart contract to retrieves a text from a real-world API and stores it on the Ethereum blockchain.

• Assumptions
• Enviroment variables
• Interact with the deployed smart-contract
• Run Tests
• Run Deploy
• Tools

Assumptions

• Using https://www.quicknode.com/ to call the ETH Rinkeby testnet.

Enviroment variables

• DEV_RINKEBY_KEY=[Rinkeby test network key]
• PROD_MAINNET_KEY=[Mainnet network key]
• PRIVATE_KEY=[Private Key]
• CHAINLINK_TOKEN_ADDRESS=[Chainlink LINK token address]
• CHAINLINK_ORACLE_ADDRESS=[Chainlink Oracle address]
• CHAINLINK_JOBID=[Chainlink Job ID]
• EXTERNAL_API_URL=[External API URL]
• EXTERNAL_API_PATH=[External API Path]

Interact with the deployed smart-contract

• Smart-contract address
  • Get balance
  • Update message

npm run execute

Run Tests

• Run unit-test cases aginist the moked smart-contracts
  • MockLink Ref
  • MockMessageStorage

npm run test

Run Deploy

• Deploy the contract to Rinkeby test network

Tools

• Solidity
• Hardhat
• Chainlink Get > Bytes