func anchorChainToDirBlockInfo(aRecord *anchor.AnchorRecord) (*common.DirBlockInfo, error) {
dirBlockInfo := new(common.DirBlockInfo)
dirBlockInfo.DBHeight = aRecord.DBHeight
dirBlockInfo.BTCTxOffset = aRecord.Bitcoin.Offset
dirBlockInfo.BTCBlockHeight = aRecord.Bitcoin.BlockHeight
mrBytes, _ := hex.DecodeString(aRecord.KeyMR)
dirBlockInfo.DBMerkleRoot, _ = common.NewShaHash(mrBytes)
dirBlockInfo.BTCConfirmed = true
txSha, _ := wire.NewShaHashFromStr(aRecord.Bitcoin.TXID)
dirBlockInfo.BTCTxHash = toHash(txSha)
blkSha, _ := wire.NewShaHashFromStr(aRecord.Bitcoin.BlockHash)
dirBlockInfo.BTCBlockHash = toHash(blkSha)
dblock, err := db.FetchDBlockByHeight(aRecord.DBHeight)
if err != nil {
fmt.Printf("err in FetchDBlockByHeight: %d\n", aRecord.DBHeight)
dirBlockInfo.DBHash = new(common.Hash)
} else {
dirBlockInfo.Timestamp = int64(dblock.Header.Timestamp * 60)
dirBlockInfo.DBHash = dblock.DBHash
}
fmt.Printf("dirBlockInfo: %s\n", spew.Sdump(dirBlockInfo))
return dirBlockInfo, nil
}
func addTxIn(msgtx *wire.MsgTx, b balance) error {
output := b.unspentResult
anchorLog.Info("unspentResult: %#v\n", output)
prevTxHash, err := wire.NewShaHashFromStr(output.TxID)
if err != nil {
return fmt.Errorf("cannot get sha hash from str: %s", err)
}
outPoint := wire.NewOutPoint(prevTxHash, output.Vout)
msgtx.AddTxIn(wire.NewTxIn(outPoint, nil))
// OnRedeemingTx
err = dclient.NotifySpent([]*wire.OutPoint{outPoint})
if err != nil {
anchorLog.Error("NotifySpent err: ", err.Error())
}
subscript, err := hex.DecodeString(output.ScriptPubKey)
if err != nil {
return fmt.Errorf("cannot decode scriptPubKey: %s", err)
}
sigScript, err := txscript.SignatureScript(msgtx, 0, subscript,
txscript.SigHashAll, b.wif.PrivKey, true) //.ToECDSA(), true)
if err != nil {
return fmt.Errorf("cannot create scriptSig: %s", err)
}
msgtx.TxIn[0].SignatureScript = sigScript
return nil
}
func (a *Anchor) doSaveDirBlockInfo(transaction *btcutil.Tx, details *btcjson.BlockDetails, dirBlockInfo *dbInfo.DirBlockInfo, replace bool) {
if replace {
dirBlockInfo.BTCTxHash = toHash(transaction.Sha()) // in case of tx being malleated
}
dirBlockInfo.BTCTxOffset = int32(details.Index)
dirBlockInfo.BTCBlockHeight = details.Height
btcBlockHash, _ := wire.NewShaHashFromStr(details.Hash)
dirBlockInfo.BTCBlockHash = toHash(btcBlockHash)
dirBlockInfo.SetTimestamp(primitives.NewTimestampNow())
a.db.SaveDirBlockInfo(dirBlockInfo)
anchorLog.Infof("In doSaveDirBlockInfo, dirBlockInfo:%s saved to db\n", spew.Sdump(dirBlockInfo))
// to make factom / explorer more user friendly, instead of waiting for
// over 2 hours to know it's anchored, we can create the anchor chain instantly
// then change it when the btc main chain re-org happens.
a.saveToAnchorChain(dirBlockInfo)
}
func saveDirBlockInfo(transaction *btcutil.Tx, details *btcjson.BlockDetails) {
anchorLog.Debug("in saveDirBlockInfo")
var saved = false
for _, dirBlockInfo := range dirBlockInfoMap {
if dirBlockInfo.BTCTxHash != nil &&
bytes.Compare(dirBlockInfo.BTCTxHash.Bytes(), transaction.Sha().Bytes()) == 0 {
dirBlockInfo.BTCTxOffset = int32(details.Index)
dirBlockInfo.BTCBlockHeight = details.Height
btcBlockHash, _ := wire.NewShaHashFromStr(details.Hash)
dirBlockInfo.BTCBlockHash = toHash(btcBlockHash)
dirBlockInfo.BTCConfirmed = true
db.InsertDirBlockInfo(dirBlockInfo)
delete(dirBlockInfoMap, dirBlockInfo.DBMerkleRoot.String())
anchorLog.Infof("In saveDirBlockInfo, dirBlockInfo:%s saved to db\n", spew.Sdump(dirBlockInfo))
saved = true
anchorRec := new(AnchorRecord)
anchorRec.AnchorRecordVer = 1
anchorRec.DBHeight = dirBlockInfo.DBHeight
anchorRec.KeyMR = dirBlockInfo.DBMerkleRoot.String()
_, recordHeight, _ := db.FetchBlockHeightCache()
anchorRec.RecordHeight = uint32(recordHeight)
anchorRec.Bitcoin.Address = defaultAddress.String()
anchorRec.Bitcoin.TXID = transaction.Sha().String()
anchorRec.Bitcoin.BlockHeight = details.Height
anchorRec.Bitcoin.BlockHash = details.Hash
anchorRec.Bitcoin.Offset = int32(details.Index)
anchorLog.Info("anchor.record saved: " + spew.Sdump(anchorRec))
//jsonARecord, _ := json.Marshal(anchorRec)
//anchorLog.Debug("jsonAnchorRecord: ", string(jsonARecord))
//Submit the anchor record to the anchor chain (entry chain)
err := submitEntryToAnchorChain(anchorRec)
if err != nil {
anchorLog.Error("Error in writing anchor into anchor chain: ", err.Error())
}
break
}
}
// should not happen at all?
if !saved {
anchorLog.Info("Not saved to db: ")
}
}
func saveDirBlockInfo(transaction *btcutil.Tx, details *btcjson.BlockDetails) {
anchorLog.Debug("in saveDirBlockInfo")
var saved = false
for _, dirBlockInfo := range dirBlockInfoMap {
if bytes.Compare(dirBlockInfo.BTCTxHash.Bytes(), transaction.Sha().Bytes()) == 0 {
dirBlockInfo.BTCTxOffset = int32(details.Index)
dirBlockInfo.BTCBlockHeight = details.Height
btcBlockHash, _ := wire.NewShaHashFromStr(details.Hash)
dirBlockInfo.BTCBlockHash = toHash(btcBlockHash)
dirBlockInfo.BTCConfirmed = true
db.InsertDirBlockInfo(dirBlockInfo)
delete(dirBlockInfoMap, dirBlockInfo.DBMerkleRoot.String())
anchorLog.Infof("In saveDirBlockInfo, dirBlockInfo:%s saved to db\n", spew.Sdump(dirBlockInfo))
saved = true
anchorRec := new(AnchorRecord)
anchorRec.AnchorRecordVer = 1
anchorRec.DBHeight = dirBlockInfo.DBHeight
anchorRec.KeyMR = dirBlockInfo.DBMerkleRoot.String()
_, recordHeight, _ := db.FetchBlockHeightCache()
anchorRec.RecordHeight = uint32(recordHeight)
anchorRec.Bitcoin.Address = defaultAddress.String()
anchorRec.Bitcoin.TXID = transaction.Sha().String()
anchorRec.Bitcoin.BlockHeight = details.Height
anchorRec.Bitcoin.BlockHash = details.Hash
anchorRec.Bitcoin.Offset = int32(details.Index)
anchorLog.Info("anchor.record saved: " + spew.Sdump(anchorRec))
err := submitEntryToAnchorChain(anchorRec)
if err != nil {
anchorLog.Error("Error in writing anchor into anchor chain: ", err.Error())
}
break
}
}
// This happends when there's a double spending (for dir block 122 and its btc tx)
// (see https://www.blocktrail.com/BTC/tx/ac82f4173259494b22f4987f1e18608f38f1ff756fb4a3c637dfb5565aa5e6cf)
// or tx mutation / malleated
// In this case, it will end up being re-anchored.
if !saved {
anchorLog.Info("Not saved to db: btc.tx=%s\n blockDetails=%s\n", spew.Sdump(transaction), spew.Sdump(details))
}
}
func (a *Anchor) checkConfirmations(dirBlockInfo *dbInfo.DirBlockInfo, index int) error {
anchorLog.Debug("check Confirmations for btc tx: ", toShaHash(dirBlockInfo.GetBTCTxHash()).String())
txResult, err := a.wclient.GetTransaction(toShaHash(dirBlockInfo.GetBTCTxHash()))
if err != nil {
anchorLog.Debugf(err.Error())
return err
}
anchorLog.Debugf("GetTransactionResult: %s\n", spew.Sdump(txResult))
if txResult.Confirmations >= int64(a.confirmationsNeeded) {
btcBlockHash, _ := wire.NewShaHashFromStr(txResult.BlockHash)
var rewrite = false
// Either the call back is not recorded in case of BTCBlockHash is zero hash,
// or bad things like re-organization of btc main chain happened
if bytes.Compare(dirBlockInfo.BTCBlockHash.Bytes(), btcBlockHash.Bytes()) != 0 {
anchorLog.Debugf("BTCBlockHash changed: original BTCBlockHeight=%d, original BTCBlockHash=%s, original tx offset=%d\n", dirBlockInfo.BTCBlockHeight, toShaHash(dirBlockInfo.BTCBlockHash).String(), dirBlockInfo.BTCTxOffset)
dirBlockInfo.BTCBlockHash = toHash(btcBlockHash)
btcBlock, err := a.wclient.GetBlockVerbose(btcBlockHash, true)
if err != nil {
anchorLog.Debugf(err.Error())
}
if btcBlock.Height > 0 {
dirBlockInfo.BTCBlockHeight = int32(btcBlock.Height)
}
anchorLog.Debugf("BTCBlockHash changed: new BTCBlockHeight=%d, new BTCBlockHash=%s, btcBlockVerbose.Height=%d\n", dirBlockInfo.BTCBlockHeight, btcBlockHash.String(), btcBlock.Height)
rewrite = true
}
dirBlockInfo.BTCConfirmed = true // needs confirmationsNeeded (20) to be confirmed.
dirBlockInfo.SetTimestamp(primitives.NewTimestampNow())
a.db.SaveDirBlockInfo(dirBlockInfo)
a.dirBlockInfoSlice = append(a.dirBlockInfoSlice[:index], a.dirBlockInfoSlice[index+1:]...) //delete it
anchorLog.Debugf("Fully confirmed %d times. txid=%s, dirblockInfo=%s\n", txResult.Confirmations, txResult.TxID, spew.Sdump(dirBlockInfo))
if rewrite {
anchorLog.Debug("rewrite to anchor chain: ", spew.Sdump(dirBlockInfo))
a.saveToAnchorChain(dirBlockInfo)
}
}
return nil
}