// 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 }