Contract con_zangascoin_lst001


Contract Code

1 balances = Hash(default_value=0, contract='con_zangascoin_lst001', name=
2 'balances')
3 metadata = Hash(contract='con_zangascoin_lst001', name='metadata')
4
5
6 def ():
7 balances[ctx.caller] = 10000
8 metadata['token_name'] = 'Zangas Coin'
9 metadata['token_symbol'] = 'ZNC'
10 metadata['operator'] = ctx.caller
11
12
13 @export('con_zangascoin_lst001')
14 def change_metadata(key: str, value: Any):
15 assert ctx.caller == metadata['operator'
16 ], 'Only operator can set metadata!'
17 metadata[key] = value
18
19
20 @export('con_zangascoin_lst001')
21 def transfer(amount: float, to: str):
22 assert amount > 0, 'Cannot send negative balances!'
23 assert balances[ctx.caller] >= amount, 'Not enough coins to send!'
24 balances[ctx.caller] -= amount
25 balances[to] += amount
26
27
28 @export('con_zangascoin_lst001')
29 def approve(amount: float, to: str):
30 assert amount > 0, 'Cannot send negative balances!'
31 balances[ctx.caller, to] += amount
32
33
34 @export('con_zangascoin_lst001')
35 def transfer_from(amount: float, to: str, main_account: str):
36 assert amount > 0, 'Cannot send negative balances!'
37 assert balances[main_account, ctx.caller
38 ] >= amount, 'Not enough coins approved to send! You have {} and are trying to spend {}'.format(
39 balances[main_account, ctx.caller], amount)
40 assert balances[main_account] >= amount, 'Not enough coins to send!'
41 balances[main_account, ctx.caller] -= amount
42 balances[main_account] -= amount
43 balances[to] += amount
44

Byte Code

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