public async Task <TransactionVerifierResult> VerifyAsync(NdmTransaction transaction)
{
int confirmations = 0;
Block?latestBlock = await _blockchainBridge.GetLatestBlockAsync();
if (latestBlock is null)
{
return(new TransactionVerifierResult(false, 0, _requiredBlockConfirmations));
}
do
{
confirmations++;
if (latestBlock.Hash == transaction.BlockHash)
{
break;
}
latestBlock = await _blockchainBridge.FindBlockAsync(latestBlock.ParentHash);
if (latestBlock is null)
{
confirmations = 0;
break;
}
if (confirmations == _requiredBlockConfirmations)
{
break;
}
} while (confirmations < _requiredBlockConfirmations);
return(new TransactionVerifierResult(true, confirmations, _requiredBlockConfirmations));
}
public async Task verify_async_should_return_result_with_confirmed_property_equal_to_false_if_latest_block_is_null()
{
NdmTransaction transaction = GetTransaction();
TransactionVerifierResult result = await _transactionVerifier.VerifyAsync(transaction);
result.BlockFound.Should().BeFalse();
result.Confirmed.Should().BeFalse();
await _blockchainBridge.Received().GetLatestBlockAsync();
}
public async Task verify_async_should_return_result_with_confirmed_property_equal_to_false_if_block_was_not_found_and_required_number_of_confirmations_was_not_achieved()
{
Block block = GetBlock();
NdmTransaction transaction = GetTransaction();
_blockchainBridge.GetLatestBlockAsync().Returns(block);
TransactionVerifierResult result = await _transactionVerifier.VerifyAsync(transaction);
result.BlockFound.Should().BeTrue();
result.Confirmed.Should().BeFalse();
await _blockchainBridge.Received().GetLatestBlockAsync();
await _blockchainBridge.Received().FindBlockAsync(block.ParentHash);
}
public async Task will_not_claim_without_enough_confirmations()
{
PaymentClaim claim = GenerateTestClaim(PaymentClaimStatus.Sent, "will_not_claim_without_enough_confirmations");
await paymentClaimRepository.AddAsync(claim);
var testTransaction = new NdmTransaction(new Transaction(), false, 1, Keccak.OfAnEmptyString, 5);
blockchainBridge.GetTransactionAsync(claim.Transaction.Hash).Returns(Task.FromResult(testTransaction));
transactionVerifier.VerifyAsync(testTransaction).Returns(Task.FromResult(new TransactionVerifierResult(true, 2, 5)));
WaitForPaymentClaimsProcessing();
var addedClaim = await paymentClaimRepository.GetAsync(claim.Id);
Assert.IsTrue(addedClaim.Status != PaymentClaimStatus.Claimed);
}
public async Task can_claim_payment()
{
PaymentClaim claim = GenerateTestClaim(PaymentClaimStatus.Sent, "can_claim_payment");
await paymentClaimRepository.AddAsync(claim);
var testTransaction = new NdmTransaction(new Transaction(), false, 5, Keccak.OfAnEmptyString, 1);
blockchainBridge.GetTransactionAsync(claim.Transaction.Hash).Returns(Task.FromResult(testTransaction));
transactionVerifier.VerifyAsync(testTransaction).Returns(Task.FromResult(new TransactionVerifierResult(true, 10, 2)));
WaitForPaymentClaimsProcessing();
var addedClaim = await paymentClaimRepository.GetAsync(claim.Id);
Assert.IsTrue(addedClaim.Status == PaymentClaimStatus.Claimed);
}
private async Task <(uint confirmations, bool rejected)> VerifyDepositConfirmationsAsync(DepositDetails deposit,
NdmTransaction transaction, long headNumber)
{
if (headNumber <= transaction.BlockNumber)
{
return(0, false);
}
Keccak?transactionHash = deposit.Transaction?.Hash;
uint confirmations = 0u;
Block? block = await _blockchainBridge.FindBlockAsync(headNumber);
do
{
if (block is null)
{
if (_logger.IsWarn)
{
_logger.Warn("Block was not found.");
}
return(0, false);
}
uint confirmationTimestamp = await _depositService.VerifyDepositAsync(deposit.Consumer, deposit.Id, block.Header.Number);
if (confirmationTimestamp > 0)
{
confirmations++;
if (_logger.IsInfo)
{
_logger.Info($"Deposit: '{deposit.Id}' has been confirmed in block number: {block.Number}, hash: '{block.Hash}', transaction hash: '{transactionHash}', timestamp: {confirmationTimestamp}.");
}
if (deposit.ConfirmationTimestamp == 0)
{
deposit.SetConfirmationTimestamp(confirmationTimestamp);
await _depositRepository.UpdateAsync(deposit);
}
}
else
{
if (_logger.IsInfo)
{
_logger.Info($"Deposit with id: '{deposit.Id}' has not returned confirmation timestamp from the contract call yet.'");
}
return(0, false);
}
if (confirmations == _requiredBlockConfirmations)
{
break;
}
if (transaction.BlockHash == block.Hash || block.Number <= transaction.BlockNumber)
{
break;
}
if (block.ParentHash is null)
{
break;
}
block = await _blockchainBridge.FindBlockAsync(block.ParentHash);
} while (confirmations < _requiredBlockConfirmations);
long latestBlockNumber = await _blockchainBridge.GetLatestBlockNumberAsync();
long?blocksDifference = latestBlockNumber - transaction.BlockNumber;
if (blocksDifference >= _requiredBlockConfirmations && confirmations < _requiredBlockConfirmations)
{
if (_logger.IsError)
{
_logger.Error($"Deposit: '{deposit.Id}' has been rejected - missing confirmation in block number: {block!.Number}, hash: {block!.Hash}' (transaction hash: '{transactionHash}').");
}
return(confirmations, true);
}
return(confirmations, false);
}