gravity-web3-example

Setup Ganache

• Install: https://trufflesuite.com/ganache/
• Start app and click "Quickstart (Ethereum)" button - This will start blochain on the address: http://127.0.0.1:7545

Setup Contracts locally

• Get/clone smart contracts

• Install Truffle cli tool globally (to build and deploy smart contracts to the blockchain) - npm install -g truffle

• Open smart contracts folder in terminal and execute the following commands:

## Compile contracts
$ truffle compile

## Test contracts
$ truffle test

## Deploy contracts (this by default will deploy contracts to http://127.0.0.1:7545)
$ truffle migrate

• After migrate command from logs we need contract address value under the 2_deploy_contracts.js

Changes needed for the example code to work

• Update blockchain endpoint http://127.0.0.1:7545 (only if it's different from the default one) - Web3_Provider.swift file endpoint variable

• Update smart contract address - Web3_Provider.swift file contractAddress variable (use contract address which we got from the logs)

• In order to test Sign Terms or Verify Signature you should import wallets with balance - Variables are in ContentView.swift file

  • There is two way to import wallet with mnemonics (update mnemonicsForImportWallet variable) or with private key (update privateKeyForImportWallet variable) this will import wallets from Ganache

• Wallets/Addresses created in the app won't have balance so they won't be able to do any operation