import std/json import pkg/asynctest import pkg/questionable import pkg/stint import pkg/ethers import pkg/ethers/erc20 import ./hardhat type TestToken = ref object of Erc20Token method mint(token: TestToken, holder: Address, amount: UInt256): Confirmable {.base, contract.} for url in ["ws://localhost:8545", "http://localhost:8545"]: suite "ERC20 (" & url & ")": var token: Erc20Token var testToken: TestToken var provider: JsonRpcProvider var snapshot: JsonNode var accounts: seq[Address] setup: provider = JsonRpcProvider.new(url, pollingInterval = 100.millis) snapshot = await provider.send("evm_snapshot") accounts = await provider.listAccounts() let deployment = readDeployment() testToken = TestToken.new(!deployment.address(TestToken), provider.getSigner()) token = Erc20Token.new(!deployment.address(TestToken), provider.getSigner()) teardown: discard await provider.send("evm_revert", @[snapshot]) await provider.close() test "retrieves basic information": check (await token.name()) == "TestToken" check (await token.symbol()) == "TST" check (await token.decimals()) == 12 check (await token.totalSupply()) == 0.u256 check (await token.balanceOf(accounts[0])) == 0.u256 check (await token.allowance(accounts[0], accounts[1])) == 0.u256 test "transfer tokens": check (await token.balanceOf(accounts[0])) == 0.u256 check (await token.allowance(accounts[0], accounts[1])) == 0.u256 discard await testToken.mint(accounts[0], 100.u256) check (await token.totalSupply()) == 100.u256 check (await token.balanceOf(accounts[0])) == 100.u256 check (await token.balanceOf(accounts[1])) == 0.u256 discard await token.transfer(accounts[1], 50.u256) check (await token.balanceOf(accounts[0])) == 50.u256 check (await token.balanceOf(accounts[1])) == 50.u256 test "approve tokens": discard await testToken.mint(accounts[0], 100.u256) check (await token.allowance(accounts[0], accounts[1])) == 0.u256 check (await token.balanceOf(accounts[0])) == 100.u256 check (await token.balanceOf(accounts[1])) == 0.u256 discard await token.approve(accounts[1], 50.u256) check (await token.allowance(accounts[0], accounts[1])) == 50.u256 check (await token.balanceOf(accounts[0])) == 100.u256 check (await token.balanceOf(accounts[1])) == 0.u256 test "increase/decrease allowance": discard await testToken.mint(accounts[0], 100.u256) check (await token.allowance(accounts[0], accounts[1])) == 0.u256 check (await token.balanceOf(accounts[0])) == 100.u256 check (await token.balanceOf(accounts[1])) == 0.u256 discard await token.increaseAllowance(accounts[1], 50.u256) check (await token.allowance(accounts[0], accounts[1])) == 50.u256 check (await token.balanceOf(accounts[0])) == 100.u256 check (await token.balanceOf(accounts[1])) == 0.u256 discard await token.increaseAllowance(accounts[1], 50.u256) check (await token.allowance(accounts[0], accounts[1])) == 100.u256 check (await token.balanceOf(accounts[0])) == 100.u256 check (await token.balanceOf(accounts[1])) == 0.u256 discard await token.decreaseAllowance(accounts[1], 50.u256) check (await token.allowance(accounts[0], accounts[1])) == 50.u256 check (await token.balanceOf(accounts[0])) == 100.u256 check (await token.balanceOf(accounts[1])) == 0.u256 test "transferFrom tokens": let senderAccount = accounts[0] let receiverAccount = accounts[1] let receiverAccountSigner = provider.getSigner(receiverAccount) check (await token.balanceOf(senderAccount)) == 0.u256 check (await token.allowance(senderAccount, receiverAccount)) == 0.u256 discard await testToken.mint(senderAccount, 100.u256) check (await token.totalSupply()) == 100.u256 check (await token.balanceOf(senderAccount)) == 100.u256 check (await token.balanceOf(receiverAccount)) == 0.u256 discard await token.approve(receiverAccount, 50.u256) check (await token.allowance(senderAccount, receiverAccount)) == 50.u256 check (await token.balanceOf(senderAccount)) == 100.u256 check (await token.balanceOf(receiverAccount)) == 0.u256 discard await token.connect(receiverAccountSigner).transferFrom(senderAccount, receiverAccount, 50.u256) check (await token.balanceOf(senderAccount)) == 50.u256 check (await token.balanceOf(receiverAccount)) == 50.u256 check (await token.allowance(senderAccount, receiverAccount)) == 0.u256