Go Solidity

This repository contains a sample Golang application which interacts with a deployed solidity smart contract

First steps

• Install Ganache here https://trufflesuite.com/ganache/
• Run your local ganache and then update the Makefile file with the right values of your running ganache instance
• Once you have a running Ganache locally, in the gear icon at Truffle Projects you should add the truffle-config.js file to enable a better visualization of what's going on with the deployed contract (eg. get the contract address).
• Install truffle with npm npm install -g truffle
• At project root execute truffle migrate, you should notice new blocks created at your running ganache instance

simple-storage (example)

• Make sure you have golang installed at your machine.
• Make sure you have a ganache installed and running.
• Update the variables at Makefile and execute:

make it-storage

The above command will execute the following actions

• Stablish a connection with the Ethereum Ganache client
• Get the current state of SimpleStorage.sol deployed smart contract
• Set a new value to the variable storedValue uint at the deployed smart contract

coin (example)

In this example, I built a simple smart contract which keeps a mapping of account -> amount of tokens (uint), and the smart contract has 2 public functions sent and mint, where the mint function is only called by the smart contract upload account (minter)

(... same requirements from past example)

In one terminal execute:

obs: the make it-coin-listen at Makefile should contains ws:// instead of http:// at GANACHE_HOST env var

make it-coin-listen

This will spins up a filter logs subscriber which will output 2 kinds of events: Sent and Minted, these two events are emmited when a token are sent from an account to another and when the minter creates more tokens (increase the supply), respectively.

You can use the truffle develop command and interact with the deployed smart contract and call the mint and sent function to emmit the events and check the output of the listener!

obs: I'm currently working on the make it-coin-transfer and make it-coin-mint commands!