// computeConsensusChange computes the consensus change from the change entry
// at index 'i' in the change log. If i is out of bounds, an error is returned.
func (cs *ConsensusSet) computeConsensusChange(tx *bolt.Tx, ce changeEntry) (modules.ConsensusChange, error) {
cc := modules.ConsensusChange{
ID: ce.ID(),
}
for _, revertedBlockID := range ce.RevertedBlocks {
revertedBlock, err := getBlockMap(tx, revertedBlockID)
if err != nil {
cs.log.Critical("getBlockMap failed in computeConsensusChange:", err)
return modules.ConsensusChange{}, err
}
// Because the direction is 'revert', the order of the diffs needs to
// be flipped and the direction of the diffs also needs to be flipped.
cc.RevertedBlocks = append(cc.RevertedBlocks, revertedBlock.Block)
for i := len(revertedBlock.SiacoinOutputDiffs) - 1; i >= 0; i-- {
scod := revertedBlock.SiacoinOutputDiffs[i]
scod.Direction = !scod.Direction
cc.SiacoinOutputDiffs = append(cc.SiacoinOutputDiffs, scod)
}
for i := len(revertedBlock.FileContractDiffs) - 1; i >= 0; i-- {
fcd := revertedBlock.FileContractDiffs[i]
fcd.Direction = !fcd.Direction
cc.FileContractDiffs = append(cc.FileContractDiffs, fcd)
}
for i := len(revertedBlock.SiafundOutputDiffs) - 1; i >= 0; i-- {
sfod := revertedBlock.SiafundOutputDiffs[i]
sfod.Direction = !sfod.Direction
cc.SiafundOutputDiffs = append(cc.SiafundOutputDiffs, sfod)
}
for i := len(revertedBlock.DelayedSiacoinOutputDiffs) - 1; i >= 0; i-- {
dscod := revertedBlock.DelayedSiacoinOutputDiffs[i]
dscod.Direction = !dscod.Direction
cc.DelayedSiacoinOutputDiffs = append(cc.DelayedSiacoinOutputDiffs, dscod)
}
for i := len(revertedBlock.SiafundPoolDiffs) - 1; i >= 0; i-- {
sfpd := revertedBlock.SiafundPoolDiffs[i]
sfpd.Direction = modules.DiffRevert
cc.SiafundPoolDiffs = append(cc.SiafundPoolDiffs, sfpd)
}
}
for _, appliedBlockID := range ce.AppliedBlocks {
appliedBlock, err := getBlockMap(tx, appliedBlockID)
if err != nil {
cs.log.Critical("getBlockMap failed in computeConsensusChange:", err)
return modules.ConsensusChange{}, err
}
cc.AppliedBlocks = append(cc.AppliedBlocks, appliedBlock.Block)
for _, scod := range appliedBlock.SiacoinOutputDiffs {
cc.SiacoinOutputDiffs = append(cc.SiacoinOutputDiffs, scod)
}
for _, fcd := range appliedBlock.FileContractDiffs {
cc.FileContractDiffs = append(cc.FileContractDiffs, fcd)
}
for _, sfod := range appliedBlock.SiafundOutputDiffs {
cc.SiafundOutputDiffs = append(cc.SiafundOutputDiffs, sfod)
}
for _, dscod := range appliedBlock.DelayedSiacoinOutputDiffs {
cc.DelayedSiacoinOutputDiffs = append(cc.DelayedSiacoinOutputDiffs, dscod)
}
for _, sfpd := range appliedBlock.SiafundPoolDiffs {
cc.SiafundPoolDiffs = append(cc.SiafundPoolDiffs, sfpd)
}
}
cc.Synced = cs.synced
return cc, nil
}
// computeConsensusChange computes the consensus change from the change entry
// at index 'i' in the change log. If i is out of bounds, an error is returned.
func (cs *ConsensusSet) computeConsensusChange(tx *bolt.Tx, ce changeEntry) (modules.ConsensusChange, error) {
cc := modules.ConsensusChange{
ID: ce.ID(),
}
for _, revertedBlockID := range ce.RevertedBlocks {
revertedBlock, err := getBlockMap(tx, revertedBlockID)
if err != nil {
cs.log.Critical("getBlockMap failed in computeConsensusChange:", err)
return modules.ConsensusChange{}, err
}
// Because the direction is 'revert', the order of the diffs needs to
// be flipped and the direction of the diffs also needs to be flipped.
cc.RevertedBlocks = append(cc.RevertedBlocks, revertedBlock.Block)
for i := len(revertedBlock.SiacoinOutputDiffs) - 1; i >= 0; i-- {
scod := revertedBlock.SiacoinOutputDiffs[i]
scod.Direction = !scod.Direction
cc.SiacoinOutputDiffs = append(cc.SiacoinOutputDiffs, scod)
}
for i := len(revertedBlock.FileContractDiffs) - 1; i >= 0; i-- {
fcd := revertedBlock.FileContractDiffs[i]
fcd.Direction = !fcd.Direction
cc.FileContractDiffs = append(cc.FileContractDiffs, fcd)
}
for i := len(revertedBlock.SiafundOutputDiffs) - 1; i >= 0; i-- {
sfod := revertedBlock.SiafundOutputDiffs[i]
sfod.Direction = !sfod.Direction
cc.SiafundOutputDiffs = append(cc.SiafundOutputDiffs, sfod)
}
for i := len(revertedBlock.DelayedSiacoinOutputDiffs) - 1; i >= 0; i-- {
dscod := revertedBlock.DelayedSiacoinOutputDiffs[i]
dscod.Direction = !dscod.Direction
cc.DelayedSiacoinOutputDiffs = append(cc.DelayedSiacoinOutputDiffs, dscod)
}
for i := len(revertedBlock.SiafundPoolDiffs) - 1; i >= 0; i-- {
sfpd := revertedBlock.SiafundPoolDiffs[i]
sfpd.Direction = modules.DiffRevert
cc.SiafundPoolDiffs = append(cc.SiafundPoolDiffs, sfpd)
}
}
for _, appliedBlockID := range ce.AppliedBlocks {
appliedBlock, err := getBlockMap(tx, appliedBlockID)
if err != nil {
cs.log.Critical("getBlockMap failed in computeConsensusChange:", err)
return modules.ConsensusChange{}, err
}
cc.AppliedBlocks = append(cc.AppliedBlocks, appliedBlock.Block)
for _, scod := range appliedBlock.SiacoinOutputDiffs {
cc.SiacoinOutputDiffs = append(cc.SiacoinOutputDiffs, scod)
}
for _, fcd := range appliedBlock.FileContractDiffs {
cc.FileContractDiffs = append(cc.FileContractDiffs, fcd)
}
for _, sfod := range appliedBlock.SiafundOutputDiffs {
cc.SiafundOutputDiffs = append(cc.SiafundOutputDiffs, sfod)
}
for _, dscod := range appliedBlock.DelayedSiacoinOutputDiffs {
cc.DelayedSiacoinOutputDiffs = append(cc.DelayedSiacoinOutputDiffs, dscod)
}
for _, sfpd := range appliedBlock.SiafundPoolDiffs {
cc.SiafundPoolDiffs = append(cc.SiafundPoolDiffs, sfpd)
}
}
// Grab the child target and the minimum valid child timestamp.
recentBlock := ce.AppliedBlocks[len(ce.AppliedBlocks)-1]
pb, err := getBlockMap(tx, recentBlock)
if err != nil {
cs.log.Critical("could not find process block for known block")
}
cc.ChildTarget = pb.ChildTarget
cc.MinimumValidChildTimestamp = cs.blockRuleHelper.minimumValidChildTimestamp(tx.Bucket(BlockMap), pb)
currentBlock := currentBlockID(tx)
if cs.synced && recentBlock == currentBlock {
cc.Synced = true
}
return cc, nil
}
// updateSubscribers will inform all subscribers of the new update to the
// consensus set.
func (s *State) updateSubscribers(revertedNodes []*blockNode, appliedNodes []*blockNode) {
// Sanity check - len(appliedNodes) should never be 0.
if build.DEBUG {
if len(appliedNodes) == 0 {
panic("cannot have len(appliedNodes) = 0 in consensus set - blockchain must always get heavier")
}
}
// Take the nodes and condense them into a consensusChange object.
var cc modules.ConsensusChange
for _, rn := range revertedNodes {
// Because the direction is 'revert', the order of the diffs needs to
// be flipped and the direction of the diffs also needs to be flipped.
cc.RevertedBlocks = append(cc.RevertedBlocks, rn.block)
for i := len(rn.siacoinOutputDiffs) - 1; i >= 0; i-- {
scod := rn.siacoinOutputDiffs[i]
scod.Direction = !scod.Direction
cc.SiacoinOutputDiffs = append(cc.SiacoinOutputDiffs, scod)
}
for i := len(rn.fileContractDiffs) - 1; i >= 0; i-- {
fcd := rn.fileContractDiffs[i]
fcd.Direction = !fcd.Direction
cc.FileContractDiffs = append(cc.FileContractDiffs, fcd)
}
for i := len(rn.siafundOutputDiffs) - 1; i >= 0; i-- {
sfod := rn.siafundOutputDiffs[i]
sfod.Direction = !sfod.Direction
cc.SiafundOutputDiffs = append(cc.SiafundOutputDiffs, sfod)
}
for i := len(rn.delayedSiacoinOutputDiffs) - 1; i >= 0; i-- {
dscod := rn.delayedSiacoinOutputDiffs[i]
dscod.Direction = !dscod.Direction
cc.DelayedSiacoinOutputDiffs = append(cc.DelayedSiacoinOutputDiffs, dscod)
}
for i := len(rn.siafundPoolDiffs) - 1; i >= 0; i-- {
sfpd := rn.siafundPoolDiffs[i]
cc.SiafundPoolDiffs = append(cc.SiafundPoolDiffs, sfpd)
}
}
for _, an := range appliedNodes {
cc.AppliedBlocks = append(cc.AppliedBlocks, an.block)
for _, scod := range an.siacoinOutputDiffs {
cc.SiacoinOutputDiffs = append(cc.SiacoinOutputDiffs, scod)
}
for _, fcd := range an.fileContractDiffs {
cc.FileContractDiffs = append(cc.FileContractDiffs, fcd)
}
for _, sfod := range an.siafundOutputDiffs {
cc.SiafundOutputDiffs = append(cc.SiafundOutputDiffs, sfod)
}
for _, dscod := range an.delayedSiacoinOutputDiffs {
cc.DelayedSiacoinOutputDiffs = append(cc.DelayedSiacoinOutputDiffs, dscod)
}
for _, sfpd := range an.siafundPoolDiffs {
cc.SiafundPoolDiffs = append(cc.SiafundPoolDiffs, sfpd)
}
}
// Add the changes to the change set.
s.consensusChanges = append(s.consensusChanges, cc)
// Notify each update channel that a new update is ready.
for _, subscriber := range s.subscriptions {
// If the channel is already full, don't block.
select {
case subscriber <- struct{}{}:
default:
}
}
}