forked from kaspanet/kaspad
/
external_spendable_utxos.go
62 lines (52 loc) · 1.87 KB
/
external_spendable_utxos.go
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package server
import (
"context"
"github.com/Hoosat-Oy/HTND/app/appmessage"
"github.com/Hoosat-Oy/HTND/cmd/htnwallet/daemon/pb"
"github.com/Hoosat-Oy/HTND/cmd/htnwallet/libhtnwallet"
"github.com/Hoosat-Oy/HTND/util"
)
func (s *server) GetExternalSpendableUTXOs(_ context.Context, request *pb.GetExternalSpendableUTXOsRequest) (*pb.GetExternalSpendableUTXOsResponse, error) {
s.lock.RLock()
defer s.lock.RUnlock()
_, err := util.DecodeAddress(request.Address, s.params.Prefix)
if err != nil {
return nil, err
}
externalUTXOs, err := s.rpcClient.GetUTXOsByAddresses([]string{request.Address})
if err != nil {
return nil, err
}
selectedUTXOs, err := s.selectExternalSpendableUTXOs(externalUTXOs, request.Address)
if err != nil {
return nil, err
}
return &pb.GetExternalSpendableUTXOsResponse{
Entries: selectedUTXOs,
}, nil
}
func (s *server) selectExternalSpendableUTXOs(externalUTXOs *appmessage.GetUTXOsByAddressesResponseMessage, address string) ([]*pb.UtxosByAddressesEntry, error) {
dagInfo, err := s.rpcClient.GetBlockDAGInfo()
if err != nil {
return nil, err
}
daaScore := dagInfo.VirtualDAAScore
maturity := s.params.BlockCoinbaseMaturity
//we do not make because we do not know size, because of unspendable utxos
var selectedExternalUtxos []*pb.UtxosByAddressesEntry
for _, entry := range externalUTXOs.Entries {
if !isExternalUTXOSpendable(entry, daaScore, maturity) {
continue
}
selectedExternalUtxos = append(selectedExternalUtxos, libhtnwallet.AppMessageUTXOToHoosatwalletdUTXO(entry))
}
return selectedExternalUtxos, nil
}
func isExternalUTXOSpendable(entry *appmessage.UTXOsByAddressesEntry, virtualDAAScore uint64, coinbaseMaturity uint64) bool {
if !entry.UTXOEntry.IsCoinbase {
return true
} else if entry.UTXOEntry.Amount <= feePerInput {
return false
}
return entry.UTXOEntry.BlockDAAScore+coinbaseMaturity < virtualDAAScore
}