forked from tanitall/memo
/
transaction_out.go
163 lines (145 loc) · 4.39 KB
/
transaction_out.go
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package db
import (
"encoding/hex"
"fmt"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcutil"
"github.com/jchavannes/btcd/txscript"
"github.com/jchavannes/jgo/jerr"
"github.com/memocash/memo/app/bitcoin/script"
"github.com/memocash/memo/app/bitcoin/wallet"
"html"
"strings"
"time"
)
type TransactionOut struct {
Id uint `gorm:"primary_key"`
Index uint32 `gorm:"unique_index:transaction_out_index;"`
HashString string
TransactionHash []byte `gorm:"unique_index:transaction_out_index;"`
Transaction *Transaction `gorm:"foreignkey:TransactionHash"`
KeyPkHash []byte `gorm:"index:pk_hash"`
Key *Key `gorm:"foreignkey:KeyPkHash"`
Value int64
PkScript []byte
LockString string
RequiredSigs uint
ScriptClass uint
TxnInHashString string `gorm:"index:txn_in_hash_string"`
TxnIn *TransactionIn `gorm:"foreignkey:TxnInHashString"`
CreatedAt time.Time
UpdatedAt time.Time
}
func getHashString(txHash []byte, index uint32) string {
hash, err := chainhash.NewHash(txHash)
if err != nil {
return ""
}
return fmt.Sprintf("out:%s:%d", hash.String(), index)
}
func (t TransactionOut) GetHashString() string {
return getHashString(t.TransactionHash, t.Index)
}
func (t TransactionOut) IsMemo() bool {
return strings.HasPrefix(t.LockString, "OP_RETURN 6d")
}
func (t TransactionOut) GetPkHash() []byte {
split := strings.Split(t.LockString, " ")
if len(split) != 5 {
return []byte{}
}
pubKey, err := hex.DecodeString(split[2])
if err != nil {
return []byte{}
}
return pubKey
}
func (t TransactionOut) GetAddressString() string {
addressPkHash, err := btcutil.NewAddressPubKeyHash(t.KeyPkHash, &wallet.MainNetParamsOld)
if err != nil {
jerr.Get("error parsing address", err).Print()
return ""
}
return addressPkHash.String()
}
func (t TransactionOut) Save() error {
result := save(&t)
if result.Error != nil {
return jerr.Get("error saving transaction output", result.Error)
}
return nil
}
func (t TransactionOut) ValueInBCH() float64 {
return float64(t.Value) * 1.e-8
}
func (t TransactionOut) HasIn() bool {
return len(t.TxnInHashString) > 0
}
func (t TransactionOut) IsSpendable() bool {
if len(t.TxnInHashString) > 0 {
txIn, _ := GetTransactionInputByHashString(t.TxnInHashString)
if txIn.Transaction.BlockId > 0 {
return false
}
}
return true
}
func (t TransactionOut) GetScriptClass() string {
return txscript.ScriptClass(t.ScriptClass).String()
}
func (t TransactionOut) GetMessage() string {
if txscript.ScriptClass(t.ScriptClass) == txscript.NullDataTy {
data, err := txscript.PushedData(t.PkScript)
if err != nil || len(data) == 0 {
return ""
}
return string(data[0])
}
return html.EscapeString(script.GetScriptString(t.PkScript))
}
func GetTransactionOutput(txHash []byte, index uint32) (*TransactionOut, error) {
var transactionOut TransactionOut
db, err := getDb()
if err != nil {
return nil, jerr.Get("error getting db", err)
}
result := db.
Where("`index` = ?", index).
Find(&transactionOut, TransactionOut{TransactionHash: txHash})
if result.Error != nil {
return nil, jerr.Get("error finding transaction output", result.Error)
}
return &transactionOut, nil
}
func GetSpendableTransactionOutputsForPkHash(pkHash []byte) ([]*TransactionOut, error) {
var transactionOuts []*TransactionOut
db, err := getDb()
if err != nil {
return nil, jerr.Get("error getting db", err)
}
result := db.
Where("txn_in_hash_string = ''").
Where("value > 0").
Find(&transactionOuts, TransactionOut{KeyPkHash: pkHash})
if result.Error != nil {
return nil, jerr.Get("error getting transaction outputs", result.Error)
}
return transactionOuts, nil
}
type TxOutSortByValue []*TransactionOut
func (txOuts TxOutSortByValue) Len() int { return len(txOuts) }
func (txOuts TxOutSortByValue) Swap(i, j int) { txOuts[i], txOuts[j] = txOuts[j], txOuts[i] }
func (txOuts TxOutSortByValue) Less(i, j int) bool {
return txOuts[i].Value > txOuts[j].Value
}
func HasSpendable(pkHash []byte) (bool, error) {
transactionOutputs, err := GetSpendableTransactionOutputsForPkHash(pkHash)
if err != nil {
return false, jerr.Get("error getting transactions", err)
}
var totalValue int64
for _, transactionOutput := range transactionOutputs {
totalValue += transactionOutput.Value
}
return totalValue > 1000, nil
}