// 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
}
// GenerateVote creates a new SSGen given a header hash, height, sstx
// tx hash, and votebits.
func (s *StakeStore) generateVote(blockHash *chainhash.Hash, height int64,
sstxHash *chainhash.Hash, voteBits uint16) (*StakeNotification, error) {
// 1. Fetch the SStx, then calculate all the values we'll need later for
// the generation of the SSGen tx outputs.
sstxRecord, err := s.getSStx(sstxHash)
if err != nil {
return nil, err
}
sstx := sstxRecord.tx
sstxMsgTx := sstx.MsgTx()
// Store the sstx pubkeyhashes and amounts as found in the transaction
// outputs.
// TODO Get information on the allowable fee range for the vote
// and check to make sure we don't overflow that.
ssgenPayTypes, ssgenPkhs, sstxAmts, _, _, _ :=
stake.GetSStxStakeOutputInfo(sstx)
// Get the current reward.
stakeVoteSubsidy := blockchain.CalcStakeVoteSubsidy(height,
s.Params)
// Calculate the output values from this data.
ssgenCalcAmts := stake.GetStakeRewards(sstxAmts,
sstxMsgTx.TxOut[0].Value,
stakeVoteSubsidy)
// 2. Add all transaction inputs to a new transaction after performing
// some validity checks. First, add the stake base, then the OP_SSTX
// tagged output.
msgTx := wire.NewMsgTx()
// Stakebase.
stakeBaseOutPoint := wire.NewOutPoint(&chainhash.Hash{},
uint32(0xFFFFFFFF),
dcrutil.TxTreeRegular)
txInStakeBase := wire.NewTxIn(stakeBaseOutPoint, []byte{})
msgTx.AddTxIn(txInStakeBase)
// Add the subsidy amount into the input.
msgTx.TxIn[0].ValueIn = stakeVoteSubsidy
// SStx tagged output as an OutPoint.
prevOut := wire.NewOutPoint(sstxHash,
0, // Index 0
1) // Tree stake
txIn := wire.NewTxIn(prevOut, []byte{})
msgTx.AddTxIn(txIn)
// 3. Add the OP_RETURN null data pushes of the block header hash,
// the block height, and votebits, then add all the OP_SSGEN tagged
// outputs.
//
// Block reference output.
blockRefScript, err := txscript.GenerateSSGenBlockRef(*blockHash,
uint32(height))
if err != nil {
return nil, err
}
blockRefOut := wire.NewTxOut(0, blockRefScript)
msgTx.AddTxOut(blockRefOut)
// Votebits output.
blockVBScript, err := txscript.GenerateSSGenVotes(voteBits)
if err != nil {
return nil, err
}
blockVBOut := wire.NewTxOut(0, blockVBScript)
msgTx.AddTxOut(blockVBOut)
// Add all the SSGen-tagged transaction outputs to the transaction after
// performing some validity checks.
for i, ssgenPkh := range ssgenPkhs {
// Create a new script which pays to the provided address specified in
// the original ticket tx.
var ssgenOutScript []byte
switch ssgenPayTypes[i] {
case false: // P2PKH
ssgenOutScript, err = txscript.PayToSSGenPKHDirect(ssgenPkh)
if err != nil {
return nil, err
}
case true: // P2SH
ssgenOutScript, err = txscript.PayToSSGenSHDirect(ssgenPkh)
if err != nil {
return nil, err
}
}
// Add the txout to our SSGen tx.
txOut := wire.NewTxOut(ssgenCalcAmts[i], ssgenOutScript)
msgTx.AddTxOut(txOut)
}
// Check to make sure our SSGen was created correctly.
ssgenTx := dcrutil.NewTx(msgTx)
ssgenTx.SetTree(dcrutil.TxTreeStake)
_, err = stake.IsSSGen(ssgenTx)
if err != nil {
return nil, err
}
// Sign the transaction.
err = s.SignVRTransaction(msgTx, sstx, true)
if err != nil {
return nil, err
}
// Send the transaction.
ssgenSha, err := s.chainSvr.SendRawTransaction(msgTx, false)
if err != nil {
return nil, err
}
// Store the information about the SSGen.
err = s.insertSSGen(blockHash,
height,
ssgenSha,
voteBits,
sstx.Sha())
if err != nil {
return nil, err
}
log.Debugf("Generated SSGen %v , voting on block %v at height %v. "+
"The ticket used to generate the SSGen was %v.",
ssgenSha, blockHash, height, sstxHash)
// Generate a notification to return.
ntfn := &StakeNotification{
TxType: int8(stake.TxTypeSSGen),
TxHash: *ssgenSha,
BlockHash: *blockHash,
Height: int32(height),
Amount: 0,
SStxIn: *sstx.Sha(),
VoteBits: voteBits,
}
return ntfn, nil
}