commit b5fbc778c040b4fdbd17381f5d7eae78dee52ad4
parent a4fc3c1ddaf645d4c67633b98fd3ce0b81a5c4e0
Author: lash <dev@holbrook.no>
Date: Wed, 26 Jul 2023 17:02:01 +0100
Implement python interface, deposit and swap test
Diffstat:
14 files changed, 394 insertions(+), 8 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,7 @@
+__pycache__
+*.pyc
+*.egg-info
+build/
+dist/
+solidity/*.json
+solidity/*.bin
diff --git a/python/erc20_pool/__init__.py b/python/erc20_pool/__init__.py
@@ -0,0 +1 @@
+from .pool import Pool
diff --git a/python/erc20_pool/data/SwapPool.bin b/python/erc20_pool/data/SwapPool.bin
@@ -0,0 +1 @@
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+\ No newline at end of file
diff --git a/python/erc20_pool/data/SwapPool.json b/python/erc20_pool/data/SwapPool.json
@@ -0,0 +1 @@
+[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"},{"internalType":"bytes32","name":"_declaration","type":"bytes32"},{"internalType":"address","name":"_tokenRegistry","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bool","name":"_final","type":"bool"},{"indexed":false,"internalType":"uint256","name":"_sealState","type":"uint256"}],"name":"SealStateChange","type":"event"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_state","type":"uint256"}],"name":"isSealed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxSealState","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_state","type":"uint256"}],"name":"seal","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sealState","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_fee","type":"uint256"}],"name":"setFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_feeAddress","type":"address"}],"name":"setFeeAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_outToken","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_outToken","type":"address"},{"internalType":"address","name":"_inToken","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_outToken","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]
diff --git a/python/erc20_pool/data/SwapPool.metadata.json b/python/erc20_pool/data/SwapPool.metadata.json
@@ -0,0 +1 @@
+{"compiler":{"version":"0.8.19+commit.7dd6d404"},"language":"Solidity","output":{"abi":[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"},{"internalType":"bytes32","name":"_declaration","type":"bytes32"},{"internalType":"address","name":"_tokenRegistry","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bool","name":"_final","type":"bool"},{"indexed":false,"internalType":"uint256","name":"_sealState","type":"uint256"}],"name":"SealStateChange","type":"event"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_state","type":"uint256"}],"name":"isSealed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxSealState","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_state","type":"uint256"}],"name":"seal","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sealState","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_fee","type":"uint256"}],"name":"setFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_feeAddress","type":"address"}],"name":"setFeeAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_outToken","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_outToken","type":"address"},{"internalType":"address","name":"_inToken","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_outToken","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"SwapPool.sol":"SwapPool"},"evmVersion":"byzantium","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":false,"runs":200},"remappings":[]},"sources":{"SwapPool.sol":{"keccak256":"0xe353d1255baee8fd9937c51600b0710e041108f041062a0130e6833a51c5c873","license":"AGPL-3.0-or-later","urls":["bzz-raw://56811f458f4310e26fbe8cf177eff3165898f324bfe74a6ca954771d20f3b498","dweb:/ipfs/QmYa1bep3hAvcNr7w1PHjRa65CLUkcJKmZRftKXZGG8wwS"]}},"version":1}
diff --git a/python/erc20_pool/data/__init__.py b/python/erc20_pool/data/__init__.py
@@ -0,0 +1,3 @@
+import os
+
+data_dir = os.path.realpath(os.path.dirname(__file__))
diff --git a/python/erc20_pool/pool.py b/python/erc20_pool/pool.py
@@ -0,0 +1,119 @@
+# standard imports
+import logging
+import os
+import enum
+
+# external imports
+from chainlib.eth.constant import ZERO_ADDRESS
+from chainlib.eth.constant import ZERO_CONTENT
+from chainlib.eth.contract import (
+ ABIContractEncoder,
+ ABIContractDecoder,
+ ABIContractType,
+ abi_decode_single,
+)
+from chainlib.eth.jsonrpc import to_blockheight_param
+from chainlib.eth.error import RequestMismatchException
+from chainlib.eth.tx import (
+ TxFactory,
+ TxFormat,
+)
+from chainlib.jsonrpc import JSONRPCRequest
+from chainlib.block import BlockSpec
+from hexathon import (
+ add_0x,
+ strip_0x,
+)
+from chainlib.eth.cli.encode import CLIEncoder
+
+# local imports
+from erc20_pool.data import data_dir
+
+logg = logging.getLogger()
+
+
+class Pool(TxFactory):
+
+ __abi = None
+ __bytecode = None
+
+ def constructor(self, sender_address, name, symbol, decimals, declaration=None, accounts_registry=None, tx_format=TxFormat.JSONRPC, version=None):
+ code = self.cargs(name, symbol, decimals, declaration=declaration, accounts_registry=accounts_registry, version=version)
+ tx = self.template(sender_address, None, use_nonce=True)
+ tx = self.set_code(tx, code)
+ return self.finalize(tx, tx_format)
+
+
+ @staticmethod
+ def cargs(name, symbol, decimals, declaration=None, accounts_registry=None, version=None):
+ if declaration == None:
+ declaration = ZERO_CONTENT
+ if accounts_registry == None:
+ accounts_registry = ZERO_ADDRESS
+ code = Pool.bytecode(version=version)
+ enc = ABIContractEncoder()
+ enc.string(name)
+ enc.string(symbol)
+ enc.uint256(decimals)
+ enc.bytes32(declaration)
+ enc.address(accounts_registry)
+ args = enc.get()
+ code += args
+ logg.debug('constructor code: ' + args)
+ return code
+
+
+ @staticmethod
+ def gas(code=None):
+ return 4000000
+
+
+ @staticmethod
+ def abi():
+ if Pool.__abi == None:
+ f = open(os.path.join(data_dir, 'SwapPool.json'), 'r')
+ Pool.__abi = json.load(f)
+ f.close()
+ return Pool.__abi
+
+
+ @staticmethod
+ def bytecode(version=None):
+ if Pool.__bytecode == None:
+ f = open(os.path.join(data_dir, 'SwapPool.bin'))
+ Pool.__bytecode = f.read()
+ f.close()
+ return Pool.__bytecode
+
+
+ def deposit(self, contract_address, sender_address, token_address, value, tx_format=TxFormat.JSONRPC, id_generator=None):
+ enc = ABIContractEncoder()
+ enc.method('deposit')
+ enc.typ(ABIContractType.ADDRESS)
+ enc.typ(ABIContractType.UINT256)
+ enc.address(token_address)
+ enc.uint256(value)
+ data = add_0x(enc.get())
+ tx = self.template(sender_address, contract_address, use_nonce=True)
+ tx = self.set_code(tx, data)
+ tx = self.finalize(tx, tx_format, id_generator=id_generator)
+ return tx
+
+
+ def swap(self, contract_address, sender_address, token_address_out, token_address_in, value, tx_format=TxFormat.JSONRPC, id_generator=None):
+ enc = ABIContractEncoder()
+ enc.method('withdraw')
+ enc.typ(ABIContractType.ADDRESS)
+ enc.typ(ABIContractType.ADDRESS)
+ enc.typ(ABIContractType.UINT256)
+ enc.address(token_address_out)
+ enc.address(token_address_in)
+ enc.uint256(value)
+ data = add_0x(enc.get())
+ tx = self.template(sender_address, contract_address, use_nonce=True)
+ tx = self.set_code(tx, data)
+ tx = self.finalize(tx, tx_format, id_generator=id_generator)
+ return tx
+
+
+
diff --git a/python/erc20_pool/unittest/__init__.py b/python/erc20_pool/unittest/__init__.py
@@ -0,0 +1 @@
+from .base import *
diff --git a/python/erc20_pool/unittest/base.py b/python/erc20_pool/unittest/base.py
@@ -0,0 +1,63 @@
+# standard imports
+import logging
+import time
+
+# external imports
+from chainlib.eth.unittest.ethtester import EthTesterCase
+from chainlib.connection import RPCConnection
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+from chainlib.eth.address import to_checksum_address
+from giftable_erc20_token.unittest import TestGiftableToken
+from eth_erc20 import ERC20
+from chainlib.eth.block import block_latest
+from eth_accounts_index.unittest import TestAccountsIndex
+from eth_accounts_index.registry import AccountRegistry
+from giftable_erc20_token import GiftableToken
+
+# local imports
+from erc20_pool import Pool
+
+logg = logging.getLogger(__name__)
+
+hash_of_foo = '2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae'
+hash_of_bar = 'fcde2b2edba56bf408601fb721fe9b5c338d10ee429ea04fae5511b68fbf8fb9'
+hash_of_baz = 'baa5a0964d3320fbc0c6a922140453c8513ea24ab8fd0577034804a967248096'
+
+
+class TestERC20Pool(TestGiftableToken):
+
+ expire = 0
+
+ def setUp(self):
+ super(TestERC20Pool, self).setUp()
+
+ self.foo_address = self.address
+ self.bar_address = self.publish_giftable_token('Bar Token', 'BAR', 16)
+ self.baz_address = self.publish_giftable_token('Baz Token', 'BAZ', 16)
+ self.initial_supply_bar = 1 << 20
+ self.initial_supply_baz = 1 << 15
+
+ nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+ c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.mint_to(self.bar_address, self.accounts[0], self.accounts[1], self.initial_supply_bar)
+ r = self.conn.do(o)
+ o = receipt(tx_hash)
+ r = self.conn.do(o)
+ self.assertEqual(r['status'], 1)
+
+ (tx_hash, o) = c.mint_to(self.baz_address, self.accounts[0], self.accounts[2], self.initial_supply_baz)
+ r = self.conn.do(o)
+ o = receipt(tx_hash)
+ r = self.conn.do(o)
+ self.assertEqual(r['status'], 1)
+
+ c = Pool(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.constructor(self.accounts[0], "Big Pool", "BIG", 16)
+ self.rpc.do(o)
+ o = receipt(tx_hash)
+ r = self.rpc.do(o)
+ self.assertEqual(r['status'], 1)
+ self.voter_address = to_checksum_address(r['contract_address'])
+ logg.debug('published bar token {}, baz token {}'.format(self.bar_address, self.baz_address))
+ logg.debug('published voter on address {} with hash {}'.format(self.voter_address, tx_hash))
diff --git a/python/requirements.txt b/python/requirements.txt
@@ -0,0 +1,3 @@
+eth-erc20~=0.7.3
+chainlib-eth~=0.4.22
+#chainlib~=0.4.14
diff --git a/python/test_requirements.txt b/python/test_requirements.txt
@@ -0,0 +1,4 @@
+eth_tester==0.5.0b3
+py-evm==0.3.0a20
+eth-interface==0.1.1
+eth-accounts-index~=0.5.3
diff --git a/python/tests/test_base.py b/python/tests/test_base.py
@@ -0,0 +1,77 @@
+# standard imports
+import unittest
+import logging
+import os
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+from chainlib.eth.block import block_latest
+from hexathon import same as same_hex
+from eth_erc20 import ERC20
+from giftable_erc20_token import GiftableToken
+
+# local imports
+from erc20_pool.unittest import TestERC20Pool
+from erc20_pool import Pool
+#from evm_tokenvote.unittest.base import hash_of_foo
+#from evm_tokenvote import Voter
+#from evm_tokenvote import ProposalState
+
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+class TestPoolBase(TestERC20Pool):
+
+ def test_deposit(self):
+ nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+ c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.approve(self.foo_address, self.accounts[0], self.voter_address, 1024)
+ self.rpc.do(o)
+
+ c = Pool(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.deposit(self.voter_address, self.accounts[0], self.foo_address, 1024)
+ self.rpc.do(o)
+ o = receipt(tx_hash)
+ r = self.rpc.do(o)
+ self.assertEqual(r['status'], 1)
+
+ c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ o = c.balance_of(self.foo_address, self.voter_address, sender_address=self.accounts[0])
+ r = self.rpc.do(o)
+ self.assertEqual(int(r, 16), 1024)
+
+
+ def test_swap(self):
+ nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+ c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.approve(self.foo_address, self.accounts[0], self.voter_address, 1024)
+ self.rpc.do(o)
+
+ c = Pool(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.deposit(self.voter_address, self.accounts[0], self.foo_address, 1024)
+ self.rpc.do(o)
+
+ nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
+ c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.approve(self.bar_address, self.accounts[1], self.voter_address, 768)
+ self.rpc.do(o)
+
+ c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.approve(self.foo_address, self.accounts[1], self.voter_address, 768)
+ self.rpc.do(o)
+
+ c = Pool(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.swap(self.voter_address, self.accounts[1], self.foo_address, self.bar_address, 768)
+ self.rpc.do(o)
+ o = receipt(tx_hash)
+ r = self.rpc.do(o)
+ self.assertEqual(r['status'], 1)
+
+ c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ o = c.balance_of(self.foo_address, self.accounts[1], sender_address=self.accounts[0])
+ r = self.rpc.do(o)
+ self.assertEqual(int(r, 16), 768)
+
+
+if __name__ == '__main__':
+ unittest.main()
diff --git a/solidity/Makefile b/solidity/Makefile
@@ -7,6 +7,6 @@ all:
truncate -s -1 SwapPool.bin
install: all
- cp -v *.json ../python/erc20_swap_pool/data/
- cp -v *.bin ../python/erc20_swap_pool/data/
+ cp -v *.json ../python/erc20_pool/data/
+ cp -v *.bin ../python/erc20_pool/data/
diff --git a/solidity/SwapPool.sol b/solidity/SwapPool.sol
@@ -6,27 +6,98 @@ pragma solidity ^0.8.0;
// Description: Voting contract using ERC20 tokens as shares
contract SwapPool {
+ // Implements EIP173
+ address public owner;
+
address registry;
address quoter;
uint256 feePpm;
address feeAddress;
+ bytes32 declaration;
+
+ string public name;
+ string public symbol;
+ uint256 public immutable decimals;
+
uint256 public totalSupply;
+
mapping ( address => uint256 ) fees;
-
- constructor(address _tokenRegistry) {
+
+ // Implements Seal
+ uint256 public sealState;
+ uint8 constant FEE_STATE = 1;
+ uint8 constant FEEADDRESS_STATE = 2;
+ uint256 constant public maxSealState = 3;
+
+ // Implements Seal
+ event SealStateChange(bool indexed _final, uint256 _sealState);
+
+ // EIP173
+ event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); // EIP173
+
+ constructor(string memory _name, string memory _symbol, uint8 _decimals, bytes32 _declaration, address _tokenRegistry) {
+ name = _name;
+ symbol = _symbol;
+ decimals = _decimals;
registry = _tokenRegistry;
+ declaration = _declaration;
+ }
+
+ function seal(uint256 _state) public returns(uint256) {
+ require(_state <= maxSealState, 'ERR_INVALID_STATE');
+ require(_state & sealState == 0, 'ERR_ALREADY_LOCKED');
+ sealState |= _state;
+ emit SealStateChange(sealState == maxSealState, sealState);
+ return uint256(sealState);
+ }
+
+ function isSealed(uint256 _state) public view returns(bool) {
+ require(_state < maxSealState);
+ if (_state == 0) {
+ return sealState == maxSealState;
+ }
+ return _state & sealState == _state;
+ }
+
+ // Change address for collecting fees
+ function setFeeAddress(address _feeAddress) public {
+ require(!isSealed(FEEADDRESS_STATE), "ERR_SEAL");
+ require(msg.sender == owner, "ERR_AXX");
+ feeAddress = _feeAddress;
+ }
+
+ // Change address for collecting fees
+ function setFee(uint256 _fee) public {
+ require(!isSealed(FEE_STATE), "ERR_SEAL");
+ require(msg.sender == owner, "ERR_AXX");
+ require(_fee < 1000000, "ERR_FEE_TOO_HIGH");
+ feePpm = _fee;
+ }
+
+ // Implements EIP173
+ function transferOwnership(address _newOwner) public returns (bool) {
+ address oldOwner;
+
+ require(msg.sender == owner);
+ oldOwner = owner;
+ owner = _newOwner;
+
+ emit OwnershipTransferred(oldOwner, owner);
+ return true;
}
function deposit(address _token, uint256 _value) public {
bool r;
bytes memory v;
- allowedToken(_token, registry);
+ mustAllowedToken(_token, registry);
(r, v) = _token.call(abi.encodeWithSignature('transferFrom(address,address,uint256)', msg.sender, this, _value));
require(r, "ERR_TOKEN");
r = abi.decode(v, (bool));
require(r, "ERR_TRANSFER");
+
+ totalSupply += _value;
}
function getFee(uint256 _value) private view returns (uint256) {
@@ -71,7 +142,7 @@ contract SwapPool {
deposit(_inToken, _value);
- (r, v) = _outToken.call(abi.encodeWithSignature('transferFrom(address,address,uint256)', this, msg.sender, netValue));
+ (r, v) = _outToken.call(abi.encodeWithSignature('transfer(address,uint256)', msg.sender, netValue));
require(r, "ERR_TOKEN");
r = abi.decode(v, (bool));
require(r, "ERR_TRANSFER");
@@ -81,11 +152,30 @@ contract SwapPool {
}
}
- function withdraw(address _token, uint256 _value) public returns (uint256) {
+ // Withdraw token to fee address
+ function withdraw(address _outToken) public returns (uint256) {
+ uint256 balance;
+ balance = fees[_outToken];
+
+ return withdraw(_outToken, balance);
}
- function allowedToken(address _token, address _registry) private {
+ function withdraw(address _outToken, uint256 _value) public returns (uint256) {
+ bool r;
+ bytes memory v;
+
+ require(feeAddress != address(0), "ERR_AXX");
+
+ (r, v) = _outToken.call(abi.encodeWithSignature('transferFrom(address,address,uint256)', this, feeAddress, _value));
+ require(r, "ERR_TOKEN");
+ r = abi.decode(v, (bool));
+ require(r, "ERR_TRANSFER");
+
+ return _value;
+ }
+
+ function mustAllowedToken(address _token, address _registry) private {
bool r;
bytes memory v;
@@ -98,4 +188,18 @@ contract SwapPool {
r = abi.decode(v, (bool));
require(r, "ERR_UNAUTH_TOKEN");
}
+
+ // Implements EIP165
+ function supportsInterface(bytes4 _sum) public pure returns (bool) {
+ if (_sum == 0x01ffc9a7) { // ERC165
+ return true;
+ }
+ if (_sum == 0x9493f8b2) { // ERC173
+ return true;
+ }
+ if (_sum == 0x0d7491f8) { // Seal
+ return true;
+ }
+ return false;
+ }
}
