// SubmitHeader accepts a block header.
func (m *Miner) SubmitHeader(bh types.BlockHeader) error {
if err := m.tg.Add(); err != nil {
return err
}
defer m.tg.Done()
// Because a call to managedSubmitBlock is required at the end of this
// function, the first part needs to be wrapped in an anonymous function
// for lock safety.
var b types.Block
err := func() error {
m.mu.Lock()
defer m.mu.Unlock()
// Lookup the block that corresponds to the provided header.
nonce := bh.Nonce
bh.Nonce = [8]byte{}
bPointer, bExists := m.blockMem[bh]
arbData, arbExists := m.arbDataMem[bh]
if !bExists || !arbExists {
return errLateHeader
}
// Block is going to be passed to external memory, but the memory pointed
// to by the transactions slice is still being modified - needs to be
// copied. Same with the memory being pointed to by the arb data slice.
b = *bPointer
txns := make([]types.Transaction, len(b.Transactions))
copy(txns, b.Transactions)
b.Transactions = txns
b.Transactions[0].ArbitraryData = [][]byte{arbData[:]}
b.Nonce = nonce
// Sanity check - block should have same id as header.
bh.Nonce = nonce
if types.BlockID(crypto.HashObject(bh)) != b.ID() {
m.log.Critical("block reconstruction failed")
}
return nil
}()
if err != nil {
m.log.Println("ERROR during call to SubmitHeader, pre SubmitBlock:", err)
return err
}
err = m.managedSubmitBlock(b)
if err != nil {
m.log.Println("ERROR returned by managedSubmitBlock:", err)
return err
}
return nil
}
// SubmitHeader accepts a block header.
func (m *Miner) SubmitHeader(bh types.BlockHeader) error {
m.mu.Lock()
// Lookup the block that corresponds to the provided header.
var b types.Block
nonce := bh.Nonce
bh.Nonce = [8]byte{}
bPointer, bExists := m.blockMem[bh]
arbData, arbExists := m.arbDataMem[bh]
if !bExists || !arbExists {
m.log.Println("ERROR:", errLateHeader)
m.mu.Unlock()
return errLateHeader
}
// Block is going to be passed to external memory, but the memory pointed
// to by the transactions slice is still being modified - needs to be
// copied. Same with the memory being pointed to by the arb data slice.
b = *bPointer
txns := make([]types.Transaction, len(b.Transactions))
copy(txns, b.Transactions)
b.Transactions = txns
b.Transactions[0].ArbitraryData = [][]byte{arbData[:]}
b.Nonce = nonce
// Sanity check - block should have same id as header.
if build.DEBUG {
bh.Nonce = nonce
if types.BlockID(crypto.HashObject(bh)) != b.ID() {
panic("block reconstruction failed")
}
}
m.mu.Unlock()
return m.SubmitBlock(b)
}