core, miner: miner header validation, transaction & receipt writing

* Miners do now verify their own header, not their state.
* Changed old putTx and putReceipts to be exported
* Moved writing of transactions and receipts out of the block processer
  in to the chain manager. Closes #1386
* Miner post ChainHeadEvent & ChainEvent. Closes #1388

core/transaction_util.go

@@ -0,0 +1,51 @@
+package core
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/logger/glog"
+	"github.com/ethereum/go-ethereum/rlp"
+)
+
+func PutTransactions(db common.Database, block *types.Block, txs types.Transactions) {
+	for i, tx := range block.Transactions() {
+		rlpEnc, err := rlp.EncodeToBytes(tx)
+		if err != nil {
+			glog.V(logger.Debug).Infoln("Failed encoding tx", err)
+			return
+		}
+		db.Put(tx.Hash().Bytes(), rlpEnc)
+
+		var txExtra struct {
+			BlockHash  common.Hash
+			BlockIndex uint64
+			Index      uint64
+		}
+		txExtra.BlockHash = block.Hash()
+		txExtra.BlockIndex = block.NumberU64()
+		txExtra.Index = uint64(i)
+		rlpMeta, err := rlp.EncodeToBytes(txExtra)
+		if err != nil {
+			glog.V(logger.Debug).Infoln("Failed encoding tx meta data", err)
+			return
+		}
+		db.Put(append(tx.Hash().Bytes(), 0x0001), rlpMeta)
+	}
+}
+
+func PutReceipts(db common.Database, hash common.Hash, receipts types.Receipts) error {
+	storageReceipts := make([]*types.ReceiptForStorage, len(receipts))
+	for i, receipt := range receipts {
+		storageReceipts[i] = (*types.ReceiptForStorage)(receipt)
+	}
+
+	bytes, err := rlp.EncodeToBytes(storageReceipts)
+	if err != nil {
+		return err
+	}
+
+	db.Put(append(receiptsPre, hash[:]...), bytes)
+
+	return nil
+}