Go Blockchain Proof-of-Concept

Minimal blockchain implementation in Go, inspired by naivechain. Provides an HTTP node plus a CLI client to list the ledger, mine new blocks, and test longest-chain replacement.

Layout

• internal/blockchain: core chain logic (genesis, hashing, validation, replacement).
• server: HTTP node exposing /blocks, /mine, /replace.
• client: CLI for interacting with a running node.

Quickstart

1. Start the node:

cd server
go run .

2. In another terminal, interact with the client:

cd client
go run . -action list
go run . -action mine -data "hello chain"

Use -host to point at a remote node (default http://localhost:8080).

Testing

From the repo root:

GOCACHE=$(pwd)/.gocache go test ./...

Notes

• Longest-chain replacement logic is covered by table-driven tests, including branch/merge scenarios.