public async Task ScanAsync(
bool skipUsed = false,
CancellationToken cancellationToken = default)
{
var currency = Currency;
var scanParams = new[]
{
// new {Chain = HdKeyStorage.NonHdKeysChain, LookAhead = 0},
new { Chain = Bip44.Internal, LookAhead = InternalLookAhead },
new { Chain = Bip44.External, LookAhead = ExternalLookAhead },
};
var txs = new List <EthereumTransaction>();
var api = new EtherScanApi(currency);
var lastBlockNumberResult = await api
.GetBlockNumber()
.ConfigureAwait(false);
if (lastBlockNumberResult.HasError)
{
Log.Error(
"Error while getting last block number with code {@code} and description {@description}",
lastBlockNumberResult.Error.Code,
lastBlockNumberResult.Error.Description);
return;
}
var lastBlockNumber = lastBlockNumberResult.Value;
if (lastBlockNumber <= 0)
{
Log.Error("Error in block number {@lastBlockNumber}", lastBlockNumber);
return;
}
foreach (var param in scanParams)
{
var freeKeysCount = 0;
var index = 0u;
while (true)
{
cancellationToken.ThrowIfCancellationRequested();
var walletAddress = await Account
.DivideAddressAsync(
account : Bip44.DefaultAccount,
chain : param.Chain,
index : index,
keyType : CurrencyConfig.StandardKey)
.ConfigureAwait(false);
if (walletAddress == null)
{
break;
}
Log.Debug(
"Scan transactions for {@name} address {@chain}:{@index}:{@address}",
currency.Name,
param.Chain,
index,
walletAddress.Address);
var events = await GetERC20EventsAsync(walletAddress.Address, cancellationToken);
if (events == null || !events.Any())
{
var ethereumAddress = await EthereumAccount
.GetAddressAsync(walletAddress.Address, cancellationToken)
.ConfigureAwait(false);
if (ethereumAddress != null && ethereumAddress.HasActivity)
{
freeKeysCount = 0;
index++;
continue;
}
freeKeysCount++;
if (freeKeysCount >= param.LookAhead)
{
Log.Debug("{@lookAhead} free keys found. Chain scan completed", param.LookAhead);
break;
}
}
else // address has activity
{
freeKeysCount = 0;
foreach (var ev in events)
{
var tx = new EthereumTransaction();
if (ev.IsERC20ApprovalEvent())
{
tx = ev.TransformApprovalEvent(currency, lastBlockNumber);
}
else if (ev.IsERC20TransferEvent())
{
tx = ev.TransformTransferEvent(walletAddress.Address, currency, lastBlockNumber);
}
if (tx != null)
{
txs.Add(tx);
}
}
}
index++;
}
}
if (txs.Any())
{
await UpsertTransactionsAsync(txs)
.ConfigureAwait(false);
}
await Account
.UpdateBalanceAsync(cancellationToken : cancellationToken)
.ConfigureAwait(false);
}
public async Task ScanAsync(
string address,
CancellationToken cancellationToken = default)
{
var currency = Currency;
Log.Debug("Scan transactions for {@currency} address {@address}",
Currency.Name,
address);
var txs = new List <EthereumTransaction>();
var api = new EtherScanApi(currency);
var lastBlockNumberResult = await api
.GetBlockNumber()
.ConfigureAwait(false);
if (lastBlockNumberResult == null)
{
Log.Error("Connection error while get block number");
return;
}
if (lastBlockNumberResult.HasError)
{
Log.Error(
"Error while getting last block number with code {@code} and description {@description}",
lastBlockNumberResult.Error.Code,
lastBlockNumberResult.Error.Description);
return;
}
var lastBlockNumber = lastBlockNumberResult.Value;
if (lastBlockNumber <= 0)
{
Log.Error(
"Error in block number {@lastBlockNumber}",
lastBlockNumber);
return;
}
var events = await GetERC20EventsAsync(address, cancellationToken)
.ConfigureAwait(false);
if (events == null || !events.Any()) // address without activity
{
return;
}
foreach (var ev in events)
{
var tx = new EthereumTransaction();
if (ev.IsERC20ApprovalEvent())
{
tx = ev.TransformApprovalEvent(currency, lastBlockNumber);
}
else if (ev.IsERC20TransferEvent())
{
tx = ev.TransformTransferEvent(address, currency, lastBlockNumber);
}
if (tx != null)
{
txs.Add(tx);
}
}
if (txs.Any())
{
await UpsertTransactionsAsync(txs)
.ConfigureAwait(false);
}
await Account
.UpdateBalanceAsync(address : address, cancellationToken : cancellationToken)
.ConfigureAwait(false);
}