// GenerateRevocation generates a revocation (SSRtx), signs it, and
// submits it by SendRawTransaction. It also stores a record of it
// in the local database.
func (s *StakeStore) generateRevocation(ns walletdb.ReadWriteBucket, waddrmgrNs walletdb.ReadBucket, blockHash *chainhash.Hash, height int64, sstxHash *chainhash.Hash,
allowHighFees bool) (*StakeNotification, error) {
// 1. Fetch the SStx, then calculate all the values we'll need later for
// the generation of the SSRtx tx outputs.
sstxRecord, err := s.getSStx(ns, sstxHash)
if err != nil {
return nil, err
}
sstx := sstxRecord.tx
// Store the sstx pubkeyhashes and amounts as found in the transaction
// outputs.
// TODO Get information on the allowable fee range for the revocation
// and check to make sure we don't overflow that.
sstxPayTypes, sstxPkhs, sstxAmts, _, _, _ :=
stake.TxSStxStakeOutputInfo(sstx.MsgTx())
ssrtxCalcAmts := stake.CalculateRewards(sstxAmts, sstx.MsgTx().TxOut[0].Value,
int64(0))
// Calculate the fee to use for this revocation based on the fee
// per KB that is standard for mainnet.
revocationSizeEst := estimateSSRtxTxSize(1, len(sstxPkhs))
revocationFee := txrules.FeeForSerializeSize(revocationFeePerKB,
revocationSizeEst)
// 2. Add the only input.
msgTx := wire.NewMsgTx()
// SStx tagged output as an OutPoint; reference this as
// the only input.
prevOut := wire.NewOutPoint(sstxHash,
0, // Index 0
1) // Tree stake
txIn := wire.NewTxIn(prevOut, []byte{})
msgTx.AddTxIn(txIn)
// 3. Add all the OP_SSRTX tagged outputs.
// Add all the SSRtx-tagged transaction outputs to the transaction after
// performing some validity checks.
feeAdded := false
for i, sstxPkh := range sstxPkhs {
// Create a new script which pays to the provided address specified in
// the original ticket tx.
var ssrtxOutScript []byte
switch sstxPayTypes[i] {
case false: // P2PKH
ssrtxOutScript, err = txscript.PayToSSRtxPKHDirect(sstxPkh)
if err != nil {
return nil, err
}
case true: // P2SH
ssrtxOutScript, err = txscript.PayToSSRtxSHDirect(sstxPkh)
if err != nil {
return nil, err
}
}
// Add a fee from an output that has enough.
amt := ssrtxCalcAmts[i]
if !feeAdded && ssrtxCalcAmts[i] >= int64(revocationFee) {
amt -= int64(revocationFee)
feeAdded = true
}
// Add the txout to our SSRtx tx.
txOut := wire.NewTxOut(amt, ssrtxOutScript)
msgTx.AddTxOut(txOut)
}
// Check to make sure our SSRtx was created correctly.
_, err = stake.IsSSRtx(msgTx)
if err != nil {
return nil, err
}
// Sign the transaction.
err = s.SignVRTransaction(waddrmgrNs, msgTx, sstx, false)
if err != nil {
return nil, err
}
// Store the information about the SSRtx.
hash := msgTx.TxSha()
err = s.insertSSRtx(ns,
blockHash,
height,
&hash,
sstx.Sha())
if err != nil {
return nil, err
}
// Send the transaction.
ssrtxSha, err := s.chainSvr.SendRawTransaction(msgTx, allowHighFees)
if err != nil {
return nil, err
}
log.Debugf("Generated SSRtx %v. The ticket used to "+
"generate the SSRtx was %v.", ssrtxSha, sstx.Sha())
// Generate a notification to return.
ntfn := &StakeNotification{
TxType: int8(stake.TxTypeSSRtx),
TxHash: *ssrtxSha,
BlockHash: chainhash.Hash{},
Height: 0,
Amount: 0,
SStxIn: *sstx.Sha(),
VoteBits: 0,
}
return ntfn, nil
}
// GenerateRevocation generates a revocation (SSRtx), signs it, and
// submits it by SendRawTransaction. It also stores a record of it
// in the local database.
func (s *StakeStore) generateRevocation(blockHash *chainhash.Hash, height int64,
sstxHash *chainhash.Hash) (*StakeNotification, error) {
var revocationFee int64
switch {
case s.Params == &chaincfg.MainNetParams:
revocationFee = revocationFeeMainNet
case s.Params == &chaincfg.TestNetParams:
revocationFee = revocationFeeTestNet
default:
revocationFee = revocationFeeTestNet
}
// 1. Fetch the SStx, then calculate all the values we'll need later for
// the generation of the SSRtx tx outputs.
sstxRecord, err := s.getSStx(sstxHash)
if err != nil {
return nil, err
}
sstx := sstxRecord.tx
// Store the sstx pubkeyhashes and amounts as found in the transaction
// outputs.
// TODO Get information on the allowable fee range for the revocation
// and check to make sure we don't overflow that.
sstxPayTypes, sstxPkhs, sstxAmts, _, _, _ :=
stake.GetSStxStakeOutputInfo(sstx)
ssrtxCalcAmts := stake.GetStakeRewards(sstxAmts, sstx.MsgTx().TxOut[0].Value,
int64(0))
// 2. Add the only input.
msgTx := wire.NewMsgTx()
// SStx tagged output as an OutPoint; reference this as
// the only input.
prevOut := wire.NewOutPoint(sstxHash,
0, // Index 0
1) // Tree stake
txIn := wire.NewTxIn(prevOut, []byte{})
msgTx.AddTxIn(txIn)
// 3. Add all the OP_SSRTX tagged outputs.
// Add all the SSRtx-tagged transaction outputs to the transaction after
// performing some validity checks.
feeAdded := false
for i, sstxPkh := range sstxPkhs {
// Create a new script which pays to the provided address specified in
// the original ticket tx.
var ssrtxOutScript []byte
switch sstxPayTypes[i] {
case false: // P2PKH
ssrtxOutScript, err = txscript.PayToSSRtxPKHDirect(sstxPkh)
if err != nil {
return nil, err
}
case true: // P2SH
ssrtxOutScript, err = txscript.PayToSSRtxSHDirect(sstxPkh)
if err != nil {
return nil, err
}
}
// Add a fee from an output that has enough.
amt := ssrtxCalcAmts[i]
if !feeAdded && ssrtxCalcAmts[i] >= revocationFee {
amt -= revocationFee
feeAdded = true
}
// Add the txout to our SSRtx tx.
txOut := wire.NewTxOut(amt, ssrtxOutScript)
msgTx.AddTxOut(txOut)
}
// Check to make sure our SSRtx was created correctly.
ssrtxTx := dcrutil.NewTx(msgTx)
ssrtxTx.SetTree(dcrutil.TxTreeStake)
_, err = stake.IsSSRtx(ssrtxTx)
if err != nil {
return nil, err
}
// Sign the transaction.
err = s.SignVRTransaction(msgTx, sstx, false)
if err != nil {
return nil, err
}
// Send the transaction.
ssrtxSha, err := s.chainSvr.SendRawTransaction(msgTx, false)
if err != nil {
return nil, err
}
// Store the information about the SSRtx.
err = s.insertSSRtx(blockHash,
height,
ssrtxSha,
sstx.Sha())
if err != nil {
return nil, err
}
log.Debugf("Generated SSRtx %v. "+
"The ticket used to generate the SSRtx was %v.",
ssrtxSha, sstx.Sha())
// Generate a notification to return.
ntfn := &StakeNotification{
TxType: int8(stake.TxTypeSSRtx),
TxHash: *ssrtxSha,
BlockHash: chainhash.Hash{},
Height: 0,
Amount: 0,
SStxIn: *sstx.Sha(),
VoteBits: 0,
}
return ntfn, nil
}
