educoin is a toy blockchain implementation.
This blockchain implementation is for education purposes only. It deliberately leaves out complex details that make up a real blockchain. Code is simple enough to be studied and understood in a few hours.
The lessons are from simple to more complex and are prefixed with a lesson
number (e.g. 0_blockchain).
All code is written in go and uses the go unit test framework in order to exercise it. For example:
$ cd 0_blockchain/
$ go test -v
=== RUN TestSuccess
--- PASS: TestSuccess (0.00s)
blockchain_test.go:26: ================================================================================
blockchain_test.go:27: Height : 0
blockchain_test.go:11: Timestamp : 2018-09-30 17:17:53 -0500 CDT
blockchain_test.go:12: PreviousBlockHash: 0000000000000000000000000000000000000000000000000000000000000000
blockchain_test.go:13: Hash : 6f8b654443d0ea969928d72e6293b692a6c1699cd568af50be285990ccded0c5
blockchain_test.go:14: Data : Decred is money!
blockchain_test.go:33: Block valid : true
blockchain_test.go:26: ================================================================================
blockchain_test.go:27: Height : 1
blockchain_test.go:11: Timestamp : 2018-09-30 17:17:53 -0500 CDT
blockchain_test.go:12: PreviousBlockHash: 6f8b654443d0ea969928d72e6293b692a6c1699cd568af50be285990ccded0c5
blockchain_test.go:13: Hash : b5fd8f68d96badfd04105a9938a48772b4ff19d4e8fbc9918c1f38eb22ba6735
blockchain_test.go:14: Data : Send 1 Decred to Alice
blockchain_test.go:33: Block valid : true
blockchain_test.go:26: ================================================================================
blockchain_test.go:27: Height : 2
blockchain_test.go:11: Timestamp : 2018-09-30 17:17:53 -0500 CDT
blockchain_test.go:12: PreviousBlockHash: b5fd8f68d96badfd04105a9938a48772b4ff19d4e8fbc9918c1f38eb22ba6735
blockchain_test.go:13: Hash : f5627bd22bc68ec22e3f32388d772b1b6806d4fa1bb13c6ba1195a54decbd7ec
blockchain_test.go:14: Data : Send 2 Decred to Bob
blockchain_test.go:33: Block valid : true
=== RUN TestFailure
--- PASS: TestFailure (0.00s)
blockchain_test.go:26: ================================================================================
blockchain_test.go:27: Height : 0
blockchain_test.go:11: Timestamp : 2018-09-30 17:17:53 -0500 CDT
blockchain_test.go:12: PreviousBlockHash: 0000000000000000000000000000000000000000000000000000000000000000
blockchain_test.go:13: Hash : 6f8b654443d0ea969928d72e6293b692a6c1699cd568af50be285990ccded0c5
blockchain_test.go:14: Data : Decred is money!
blockchain_test.go:33: Block valid : true
blockchain_test.go:26: ================================================================================
blockchain_test.go:27: Height : 1
blockchain_test.go:11: Timestamp : 2018-09-30 17:17:53 -0500 CDT
blockchain_test.go:12: PreviousBlockHash: 6f8b654443d0ea969928d72e6293b692a6c1699cd568af50be285990ccded0c5
blockchain_test.go:13: Hash : b5fd8f68d96badfd04105a9938a48772b4ff19d4e8fbc9918c1f38eb22ba6735
blockchain_test.go:14: Data : Send 2 Decred to Alice
blockchain_test.go:33: Block valid : false
PASS
ok github.com/marcopeereboom/educoin/0_blockchain 0.001s
Patches and comments are welcome!