-
Notifications
You must be signed in to change notification settings - Fork 5
/
main.rkt
50 lines (39 loc) · 1.59 KB
/
main.rkt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
#lang racket
(require "./main-helper.rkt")
(when (file-exists? "blockchain.data")
(begin
(printf "Found 'blockchain.data', reading...\n")
(print-blockchain (file->struct "blockchain.data"))
(exit)))
; Initialize wallets
(define scheme-coin-base (make-wallet))
(define wallet-a (make-wallet))
(define wallet-b (make-wallet))
; Transactions
(printf "Making genesis transaction...\n")
(define genesis-t (make-transaction scheme-coin-base wallet-a 100 '()))
; Unspent transactions (store our genesis transaction)
(define utxo (list
(make-transaction-io 100 wallet-a)))
; Blockchain initiation
(printf "Mining genesis block...\n")
(define blockchain (init-blockchain genesis-t "1337cafe" utxo))
(print-wallets blockchain wallet-a wallet-b)
; Make a second transaction
(printf "Mining second transaction...\n")
(set! blockchain (send-money-blockchain blockchain wallet-a wallet-b 20))
(print-wallets blockchain wallet-a wallet-b)
; Make a third transaction
(printf "Mining third transaction...\n")
(set! blockchain (send-money-blockchain blockchain wallet-b wallet-a 10))
(print-wallets blockchain wallet-a wallet-b)
; Attempt to make a fourth transaction
(printf "Attempting to mine fourth (not-valid) transaction...\n")
(set! blockchain (send-money-blockchain blockchain wallet-b wallet-a 200))
(print-wallets blockchain wallet-a wallet-b)
(printf "Blockchain is valid: ~a\n\n" (valid-blockchain? blockchain))
(for ([block (blockchain-blocks blockchain)])
(print-block block)
(newline))
(struct->file blockchain "blockchain.data")
(printf "Exported blockchain to 'blockchain.data'...\n")