this project is a simple example of how blockchain works. in this case using the gRPC call procedure is because gRPC uses HTTP 2.0, which makes the data exchange process faster than using the API call procedure in general.

1. run go mod tidy first to get needed package.
2. go run server/main.go : to running server.
3. And on the client side , type go run client/main.go --add to add some blocks of hash
4. And type go run client/main.go --list to get block of hash .

1. https://golang.org - The Go programming language
2. gRPC - A high-performance, open source universal RPC framework
3. Protocol Buffer - Protocol buffers are a language-neutral, platform-neutral extensible mechanism for serializing structured data.
4. Go - Protobuf - Go support for Google's protocol buffers