Overview

The project demostrates how to create a transaction on blockchains.

Normally there are 4 steps invovled:

1. Build transaction payload (i.e. retrieve gas price, nonce for ethereum)
2. Sign the payload
3. Broadcast signed payload to blockchain
4. Monitor transaction status on blockchain and modify transaction once confirmed or failed (SSE is used to udpate frontend)

Supported blockchains include:

• Ethereum local testnet (Ganache)

Notes: The same code can be used for Ethereum, Polygon, and other EVM compatible networks. Networks other than local testnet are not included because they need a third party node provider, such as Infura, for retrieving nonce, gas price, etc.

How to Use

• Install dependencies: go get -d ./...
• Start the testnet Docker container: make infra-up
• Launch the demo app: go run internal/blockchain/demo/main.go
• Then go to the URL: http://localhost:9111