public static ERC20InitiatedEventDTO ParseERC20InitiatedEvent(
this EtherScanApi.ContractEvent contractEvent)
{
var eventSignatureHash = EventSignatureExtractor.GetSignatureHash <ERC20InitiatedEventDTO>();
if (contractEvent.Topics == null ||
contractEvent.Topics.Count != 4 ||
contractEvent.EventSignatureHash() != eventSignatureHash)
{
throw new Exception("Invalid contract event");
}
var initiatorHex = contractEvent.HexData.Substring(PrefixOffset, TopicSizeInHex);
var refundTimeHex = contractEvent.HexData.Substring(PrefixOffset + TopicSizeInHex, TopicSizeInHex);
var countdownHex = contractEvent.HexData.Substring(PrefixOffset + 2 * TopicSizeInHex, TopicSizeInHex);
var valueHex = contractEvent.HexData.Substring(PrefixOffset + 3 * TopicSizeInHex, TopicSizeInHex);
var redeemFeeHex = contractEvent.HexData.Substring(PrefixOffset + 4 * TopicSizeInHex, TopicSizeInHex);
var active = contractEvent.HexData.Substring(PrefixOffset + 5 * TopicSizeInHex, TopicSizeInHex);
return(new ERC20InitiatedEventDTO
{
HashedSecret = Hex.FromString(contractEvent.Topics[1], true),
ERC20Contract =
$"0x{contractEvent.Topics[2].Substring(contractEvent.Topics[2].Length - AddressLengthInHex)}",
Participant =
$"0x{contractEvent.Topics[3].Substring(contractEvent.Topics[3].Length - AddressLengthInHex)}",
Initiator =
$"0x{initiatorHex.Substring(initiatorHex.Length - AddressLengthInHex)}",
RefundTimestamp = new HexBigInteger(refundTimeHex).Value,
Countdown = new HexBigInteger(countdownHex).Value,
Value = new HexBigInteger(valueHex).Value,
RedeemFee = new HexBigInteger(redeemFeeHex).Value,
Active = new HexBigInteger(active).Value != 0
});
}
public static ERC20RefundedEventDTO ParseRefundedEvent(
this EtherScanApi.ContractEvent contractEvent)
{
var eventSignatureHash = EventSignatureExtractor.GetSignatureHash <ERC20RefundedEventDTO>();
if (contractEvent.Topics == null ||
contractEvent.Topics.Count != 2 ||
contractEvent.EventSignatureHash() != eventSignatureHash)
{
throw new Exception("Invalid contract event");
}
return(new ERC20RefundedEventDTO
{
HashedSecret = Hex.FromString(contractEvent.Topics[1], true),
});
}
public static ERC20AddedEventDTO ParseERC20AddedEvent(
this EtherScanApi.ContractEvent contractEvent)
{
var eventSignatureHash = EventSignatureExtractor.GetSignatureHash <ERC20AddedEventDTO>();
if (contractEvent.Topics == null ||
contractEvent.Topics.Count != 2 ||
contractEvent.EventSignatureHash() != eventSignatureHash)
{
throw new Exception("Invalid contract event");
}
var initiatorHex = contractEvent.HexData.Substring(PrefixOffset, TopicSizeInHex);
var valueHex = contractEvent.HexData.Substring(PrefixOffset + TopicSizeInHex, TopicSizeInHex);
return(new ERC20AddedEventDTO
{
HashedSecret = Hex.FromString(contractEvent.Topics[1], true),
Initiator = $"0x{initiatorHex.Substring(initiatorHex.Length - AddressLengthInHex)}",
Value = new HexBigInteger(valueHex).Value
});
}
public static ERC20TransferEventDTO ParseERC20TransferEvent(
this EtherScanApi.ContractEvent contractEvent)
{
var eventSignatureHash = EventSignatureExtractor.GetSignatureHash <ERC20TransferEventDTO>();
if (contractEvent.Topics == null ||
contractEvent.Topics.Count != 3 ||
contractEvent.EventSignatureHash() != eventSignatureHash)
{
throw new Exception("Invalid ERC20 token contract event");
}
var valueHex = contractEvent.HexData.Substring(PrefixOffset, TopicSizeInHex);
return(new ERC20TransferEventDTO
{
From =
$"0x{contractEvent.Topics[1].Substring(contractEvent.Topics[1].Length - AddressLengthInHex)}",
To =
$"0x{contractEvent.Topics[2].Substring(contractEvent.Topics[2].Length - AddressLengthInHex)}",
Value = new HexBigInteger(valueHex).Value
});
}
public static bool IsERC20RefundedEvent(this EtherScanApi.ContractEvent contractEvent)
{
return(contractEvent.EventSignatureHash() == EventSignatureExtractor.GetSignatureHash <ERC20RefundedEventDTO>());
}
