// Actually make a block by simulating what miner would do
// we seed chains by the first byte of the coinbase
func makeBlock(bman *BlockProcessor, parent *types.Block, i int, db common.Database, seed int) *types.Block {
var addr common.Address
addr[0], addr[19] = byte(seed), byte(i)
block := newBlockFromParent(addr, parent)
state := state.New(block.Root(), db)
cbase := state.GetOrNewStateObject(addr)
cbase.SetGasPool(CalcGasLimit(parent))
cbase.AddBalance(BlockReward)
state.Update()
block.SetRoot(state.Root())
return block
}
func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (logs state.Logs, err error) {
sm.lastAttemptedBlock = block
// Create a new state based on the parent's root (e.g., create copy)
state := state.New(parent.Root(), sm.db)
// Block validation
if err = sm.ValidateHeader(block.Header(), parent.Header()); err != nil {
return
}
// There can be at most two uncles
if len(block.Uncles()) > 2 {
return nil, ValidationError("Block can only contain one uncle (contained %v)", len(block.Uncles()))
}
receipts, err := sm.TransitionState(state, parent, block, false)
if err != nil {
return
}
header := block.Header()
// Validate the received block's bloom with the one derived from the generated receipts.
// For valid blocks this should always validate to true.
rbloom := types.CreateBloom(receipts)
if rbloom != header.Bloom {
err = fmt.Errorf("unable to replicate block's bloom=%x", rbloom)
return
}
// The transactions Trie's root (R = (Tr [[i, RLP(T1)], [i, RLP(T2)], ... [n, RLP(Tn)]]))
// can be used by light clients to make sure they've received the correct Txs
txSha := types.DeriveSha(block.Transactions())
if txSha != header.TxHash {
err = fmt.Errorf("invalid transaction root hash. received=%x calculated=%x", header.TxHash, txSha)
return
}
// Tre receipt Trie's root (R = (Tr [[H1, R1], ... [Hn, R1]]))
receiptSha := types.DeriveSha(receipts)
if receiptSha != header.ReceiptHash {
err = fmt.Errorf("invalid receipt root hash. received=%x calculated=%x", header.ReceiptHash, receiptSha)
return
}
// Verify UncleHash before running other uncle validations
unclesSha := block.CalculateUnclesHash()
if unclesSha != header.UncleHash {
err = fmt.Errorf("invalid uncles root hash. received=%x calculated=%x", header.UncleHash, unclesSha)
return
}
// Verify uncles
if err = sm.VerifyUncles(state, block, parent); err != nil {
return
}
// Accumulate static rewards; block reward, uncle's and uncle inclusion.
AccumulateRewards(state, block)
// Commit state objects/accounts to a temporary trie (does not save)
// used to calculate the state root.
state.Update()
if header.Root != state.Root() {
err = fmt.Errorf("invalid merkle root. received=%x got=%x", header.Root, state.Root())
return
}
// Calculate the td for this block
//td = CalculateTD(block, parent)
// Sync the current block's state to the database
state.Sync()
// Remove transactions from the pool
sm.txpool.RemoveTransactions(block.Transactions())
// This puts transactions in a extra db for rpc
for i, tx := range block.Transactions() {
putTx(sm.extraDb, tx, block, uint64(i))
}
return state.Logs(), nil
}