Thanos did someting

[bytom/vapor.git] / vendor / github.com / btcsuite / btcd / blockchain / weight.go

diff --git a/vendor/github.com/btcsuite/btcd/blockchain/weight.go b/vendor/github.com/btcsuite/btcd/blockchain/weight.go
deleted file mode 100644 (file)
index 286a919..0000000
--- a/vendor/github.com/btcsuite/btcd/blockchain/weight.go
+++ /dev/null
@@ -1,111 +0,0 @@
-// Copyright (c) 2013-2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockchain
-
-import (
-       "fmt"
-
-       "github.com/btcsuite/btcd/txscript"
-       "github.com/btcsuite/btcutil"
-)
-
-const (
-       // MaxBlockWeight defines the maximum block weight, where "block
-       // weight" is interpreted as defined in BIP0141. A block's weight is
-       // calculated as the sum of the of bytes in the existing transactions
-       // and header, plus the weight of each byte within a transaction. The
-       // weight of a "base" byte is 4, while the weight of a witness byte is
-       // 1. As a result, for a block to be valid, the BlockWeight MUST be
-       // less than, or equal to MaxBlockWeight.
-       MaxBlockWeight = 4000000
-
-       // MaxBlockBaseSize is the maximum number of bytes within a block
-       // which can be allocated to non-witness data.
-       MaxBlockBaseSize = 1000000
-
-       // MaxBlockSigOpsCost is the maximum number of signature operations
-       // allowed for a block. It is calculated via a weighted algorithm which
-       // weights segragated witness sig ops lower than regular sig ops.
-       MaxBlockSigOpsCost = 80000
-
-       // WitnessScaleFactor determines the level of "discount" witness data
-       // receives compared to "base" data. A scale factor of 4, denotes that
-       // witness data is 1/4 as cheap as regular non-witness data.
-       WitnessScaleFactor = 4
-)
-
-// GetBlockWeight computes the value of the weight metric for a given block.
-// Currently the weight metric is simply the sum of the block's serialized size
-// without any witness data scaled proportionally by the WitnessScaleFactor,
-// and the block's serialized size including any witness data.
-func GetBlockWeight(blk *btcutil.Block) int64 {
-       msgBlock := blk.MsgBlock()
-
-       baseSize := msgBlock.SerializeSizeStripped()
-       totalSize := msgBlock.SerializeSize()
-
-       // (baseSize * 3) + totalSize
-       return int64((baseSize * (WitnessScaleFactor - 1)) + totalSize)
-}
-
-// GetTransactionWeight computes the value of the weight metric for a given
-// transaction. Currently the weight metric is simply the sum of the
-// transactions's serialized size without any witness data scaled
-// proportionally by the WitnessScaleFactor, and the transaction's serialized
-// size including any witness data.
-func GetTransactionWeight(tx *btcutil.Tx) int64 {
-       msgTx := tx.MsgTx()
-
-       baseSize := msgTx.SerializeSizeStripped()
-       totalSize := msgTx.SerializeSize()
-
-       // (baseSize * 3) + totalSize
-       return int64((baseSize * (WitnessScaleFactor - 1)) + totalSize)
-}
-
-// GetSigOpCost returns the unified sig op cost for the passed transaction
-// respecting current active soft-forks which modified sig op cost counting.
-// The unified sig op cost for a transaction is computed as the sum of: the
-// legacy sig op count scaled according to the WitnessScaleFactor, the sig op
-// count for all p2sh inputs scaled by the WitnessScaleFactor, and finally the
-// unscaled sig op count for any inputs spending witness programs.
-func GetSigOpCost(tx *btcutil.Tx, isCoinBaseTx bool, utxoView *UtxoViewpoint,
-       bip16, segWit bool) (int, error) {
-
-       numSigOps := CountSigOps(tx) * WitnessScaleFactor
-       if bip16 {
-               numP2SHSigOps, err := CountP2SHSigOps(tx, isCoinBaseTx, utxoView)
-               if err != nil {
-                       return 0, nil
-               }
-               numSigOps += (numP2SHSigOps * WitnessScaleFactor)
-       }
-
-       if segWit && !isCoinBaseTx {
-               msgTx := tx.MsgTx()
-               for txInIndex, txIn := range msgTx.TxIn {
-                       // Ensure the referenced input transaction is available.
-                       originTxHash := &txIn.PreviousOutPoint.Hash
-                       originTxIndex := txIn.PreviousOutPoint.Index
-                       txEntry := utxoView.LookupEntry(originTxHash)
-                       if txEntry == nil || txEntry.IsOutputSpent(originTxIndex) {
-                               str := fmt.Sprintf("output %v referenced from "+
-                                       "transaction %s:%d either does not "+
-                                       "exist or has already been spent",
-                                       txIn.PreviousOutPoint, tx.Hash(),
-                                       txInIndex)
-                               return 0, ruleError(ErrMissingTxOut, str)
-                       }
-
-                       witness := txIn.Witness
-                       sigScript := txIn.SignatureScript
-                       pkScript := txEntry.PkScriptByIndex(originTxIndex)
-                       numSigOps += txscript.GetWitnessSigOpCount(sigScript, pkScript, witness)
-               }
-
-       }
-
-       return numSigOps, nil
-}