git.delta.rocks / unique-network / refs/commits / 16ee61f3b724

--- /dev/null
+++ b/tests/src/eth/payable.test.ts
@@ -0,0 +1,98 @@
+import { expect } from 'chai';
+import privateKey from '../substrate/privateKey';
+import { submitTransactionAsync } from '../substrate/substrate-api';
+import waitNewBlocks from '../substrate/wait-new-blocks';
+import { createEthAccountWithBalance, deployCollector, GAS_ARGS, itWeb3, subToEth } from './util/helpers';
+import {evmToAddress} from '@polkadot/util-crypto';
+import { getGenericResult } from '../util/helpers';
+import { getBalanceSingle, transferBalanceExpectSuccess } from '../substrate/get-balance';
+
+describe('EVM payable contracts', ()=>{
+  itWeb3('Evm contract can receive wei from eth account', async ({api, web3}) => {
+    const deployer = await createEthAccountWithBalance(api, web3);
+    const contract = await deployCollector(web3, deployer);
+
+    await web3.eth.sendTransaction({from: deployer, to: contract.options.address, value: '10000', ...GAS_ARGS});
+    await waitNewBlocks(api, 1);
+
+    expect(await contract.methods.getCollected().call()).to.be.equal('10000');
+  });
+
+  itWeb3('Evm contract can receive wei from substrate account', async ({api, web3}) => {
+    const deployer = await createEthAccountWithBalance(api, web3);
+    const contract = await deployCollector(web3, deployer);
+    const alice = privateKey('//Alice');
+
+    // Transaction fee/value will be payed from subToEth(sender) evm balance,
+    // which is backed by evmToAddress(subToEth(sender)) substrate balance
+    await transferBalanceExpectSuccess(api, alice, evmToAddress(subToEth(alice.address)), '1000000000000');
+
+    {
+      const tx = api.tx.evm.call(
+        subToEth(alice.address),
+        contract.options.address,
+        contract.methods.giveMoney().encodeABI(),
+        '10000',
+        GAS_ARGS.gas,
+        GAS_ARGS.gasPrice,
+        null,
+      );
+      const events = await submitTransactionAsync(alice, tx);
+      const result = getGenericResult(events);
+      expect(result.success).to.be.true;
+    }
+
+    expect(await contract.methods.getCollected().call()).to.be.equal('10000');
+  });
+
+  // We can't handle sending balance to backing storage of evm balance, because evmToAddress operation is irreversible
+  itWeb3('Wei sent directly to backing storage of evm contract balance is unaccounted', async({api, web3}) => {
+    const deployer = await createEthAccountWithBalance(api, web3);
+    const contract = await deployCollector(web3, deployer);
+    const alice = privateKey('//Alice');
+
+    await transferBalanceExpectSuccess(api, alice, evmToAddress(contract.options.address), '10000');
+  
+    expect(await contract.methods.getUnaccounted().call()).to.be.equal('10000');
+  });
+
+  itWeb3('Balance can be retrieved from evm contract', async({api, web3}) => {
+    const FEE_BALANCE = 10n ** 18n;
+    const CONTRACT_BALANCE = 10n ** 14n;
+
+    const deployer = await createEthAccountWithBalance(api, web3);
+    const contract = await deployCollector(web3, deployer);
+    const alice = privateKey('//Alice');
+
+    await web3.eth.sendTransaction({from: deployer, to: contract.options.address, value: CONTRACT_BALANCE.toString(), ...GAS_ARGS});
+    await waitNewBlocks(api, 1);
+
+    const receiver = privateKey(`//Receiver${Date.now()}`);
+
+    // First receive balance on eth balance of bob
+    {
+      const ethReceiver = subToEth(receiver.address);
+      expect(await web3.eth.getBalance(ethReceiver)).to.be.equal('0');
+      await contract.methods.withdraw(ethReceiver).send({from: deployer});
+      expect(await web3.eth.getBalance(ethReceiver)).to.be.equal(CONTRACT_BALANCE.toString());
+    }
+
+    // Some balance is required to pay fee for evm.withdraw call
+    await transferBalanceExpectSuccess(api, alice, receiver.address, FEE_BALANCE.toString());
+
+    // Withdraw balance from eth to substrate
+    {
+      const initialReceiverBalance = await getBalanceSingle(api, receiver.address);
+      const tx = api.tx.evm.withdraw(
+        subToEth(receiver.address),
+        CONTRACT_BALANCE.toString(),
+      );
+      const events = await submitTransactionAsync(receiver, tx);
+      const result = getGenericResult(events);
+      expect(result.success).to.be.true;
+      const finalReceiverBalance = await getBalanceSingle(api, receiver.address);
+
+      expect(finalReceiverBalance > initialReceiverBalance).to.be.true;
+    }
+  });
+});
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