Contract con_bitcoin


Contract Code

1 # LST001
2 balances = Hash(default_value=0)
3
4 # LST002
5 metadata = Hash()
6
7 @construct
8 def seed():
9 # LST001 - MINT SUPPLY to wallet that submits the contract
10 balances[ctx.caller] = 21_000_000
11
12 # LST002
13 metadata['token_name'] = "Bitcoin"
14 metadata['token_symbol'] = "BTC"
15 metadata['operator'] = ctx.caller
16
17 # LST002
18 @export
19 def change_metadata(key: str, value: Any):
20 assert ctx.caller == metadata['operator'], 'Only operator can set metadata!'
21 metadata[key] = value
22
23 # LST001
24 @export
25 def transfer(amount: float, to: str):
26 assert amount > 0, 'Cannot send negative balances!'
27 assert balances[ctx.caller] >= amount, 'Not enough coins to send!'
28
29 balances[ctx.caller] -= amount
30 balances[to] += amount
31
32 # LST001
33 @export
34 def approve(amount: float, to: str):
35 assert amount > 0, 'Cannot send negative balances!'
36 balances[ctx.caller, to] += amount
37
38 # LST001
39 @export
40 def transfer_from(amount: float, to: str, main_account: str):
41 assert amount > 0, 'Cannot send negative balances!'
42 assert balances[main_account, ctx.caller] >= amount, 'Not enough coins approved to send! You have {} and are trying to spend {}'\
43 .format(balances[main_account, ctx.caller], amount)
44 assert balances[main_account] >= amount, 'Not enough coins to send!'
45
46 balances[main_account, ctx.caller] -= amount
47 balances[main_account] -= amount
48 balances[to] += amount

Byte Code

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