eth-erc20/python/tests/test_erc20_interface.py

# standard imports
import logging
import unittest

# external imports
from chainlib.eth.unittest.ethtester import EthTesterCase
from chainlib.connection import RPCConnection
from chainlib.eth.nonce import RPCNonceOracle
from chainlib.eth.gas import OverrideGasOracle
from chainlib.eth.tx import (
        transaction,
        receipt,
        )
from chainlib.eth.address import to_checksum_address

# local imports
from giftable_erc20_token import GiftableToken
from eth_erc20 import ERC20

logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger(__name__)


class TestToken(EthTesterCase):

    def setUp(self):
        super(TestToken, self).setUp()
        self.conn = RPCConnection.connect(self.chain_spec, 'default')
        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        self.symbol = 'FOO'
        self.name = 'Foo Token'
        self.decimals = 16
        (tx_hash, o) = c.constructor(self.accounts[0], self.name, self.symbol, self.decimals)
        r = self.conn.do(o)
        logg.debug('deployed with hash {}'.format(r))
        
        o = receipt(r)
        r = self.conn.do(o)
        self.address = to_checksum_address(r['contract_address'])

        self.initial_supply = 1 << 40
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], self.initial_supply)
        r = self.conn.do(o)
        o = receipt(tx_hash)
        r = self.conn.do(o)
        self.assertEqual(r['status'], 1)


    def test_balance(self):
        c = ERC20(self.chain_spec)
        o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
        r = self.conn.do(o)
        balance = ERC20.parse_balance(r)
        self.assertEqual(self.initial_supply, balance)


    def test_supply(self):
        c = ERC20(self.chain_spec)
        o = c.total_supply(self.address, sender_address=self.accounts[0])
        r = self.conn.do(o)
        supply = ERC20.parse_total_supply(r)
        self.assertEqual(self.initial_supply, supply)


    def test_name(self):
        c = ERC20(self.chain_spec)
        o = c.name(self.address, sender_address=self.accounts[0])
        r = self.conn.do(o)
        name = ERC20.parse_name(r)
        self.assertEqual(self.name, name)


    def test_symbol(self):
        c = ERC20(self.chain_spec)
        o = c.symbol(self.address, sender_address=self.accounts[0])
        r = self.conn.do(o)
        symbol = ERC20.parse_symbol(r)
        self.assertEqual(self.symbol, symbol)


    def test_transfer(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
        (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.accounts[1], 1000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)

        o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        balance = c.parse_balance(r)
        self.assertEqual(balance, self.initial_supply - 1000)

        o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        balance = c.parse_balance(r)
        self.assertEqual(balance, 1000)

        o = transaction(tx_hash)
        r = self.rpc.do(o)
        data = c.parse_transfer_request(r['data'])
        self.assertEqual(data[0], self.accounts[1])
        self.assertEqual(data[1], 1000)


    def test_transfer_from(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 1000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)

        o = c.allowance(self.address, self.accounts[0], self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        allowance = c.parse_allowance(r)
        self.assertEqual(allowance, 1000)

        o = transaction(tx_hash)
        r = self.rpc.do(o)
        data = c.parse_approve_request(r['data'])
        self.assertEqual(data[0], self.accounts[1])
        self.assertEqual(data[1], 1000)

        nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1001)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 0)

        o = transaction(tx_hash)
        r = self.rpc.do(o)
        data = c.parse_transfer_from_request(r['data'])
        self.assertEqual(data[0], self.accounts[0])
        self.assertEqual(data[1], self.accounts[2])
        self.assertEqual(data[2], 1001)

        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)

        o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        balance = c.parse_balance(r)
        self.assertEqual(balance, self.initial_supply - 1000)

        o = c.balance_of(self.address, self.accounts[2], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        balance = c.parse_balance(r)
        self.assertEqual(balance, 1000)


    def test_revoke_approve(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 1000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        
        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 999)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 0)
     
        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 0)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
 
        o = c.allowance(self.address, self.accounts[0], self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        allowance = c.parse_allowance(r)
        self.assertEqual(allowance, 0)

        nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 0)



if __name__ == '__main__':
    unittest.main()