Import btcchain repo into blockchain directory.

This commit contains the entire btcchain repository along with several
changes needed to move all of the files into the blockchain directory in
order to prepare it for merging.  This does NOT update btcd or any of the
other packages to use the new location as that will be done separately.

- All import paths in the old btcchain test files have been changed to
  the new location
- All references to btcchain as the package name have been changed to
  blockchain

README.md → blockchain/README.md

@@ -1,42 +1,40 @@
-btcchain
-========
+blockchain
+==========
 
-[![Build Status](http://img.shields.io/travis/btcsuite/btcchain.svg)]
-(https://travis-ci.org/btcsuite/btcchain) [![ISC License]
+[![Build Status](http://img.shields.io/travis/btcsuite/btcd.svg)]
+(https://travis-ci.org/btcsuite/btcd) [![ISC License]
 (http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
 
-Package btcchain implements bitcoin block handling and chain selection rules.
+Package blockchain implements bitcoin block handling and chain selection rules.
 The test coverage is currently only around 60%, but will be increasing over
 time. See `test_coverage.txt` for the gocov coverage report.  Alternatively, if
 you are running a POSIX OS, you can run the `cov_report.sh` script for a
-real-time report.  Package btcchain is licensed under the liberal ISC license.
+real-time report.  Package blockchain is licensed under the liberal ISC license.
 
 There is an associated blog post about the release of this package
 [here](https://blog.conformal.com/btcchain-the-bitcoin-chain-package-from-bctd/).
 
-This package is one of the core packages from btcd, an alternative full-node
-implementation of bitcoin which is under active development by Conformal.
-Although it was primarily written for btcd, this package has intentionally been
-designed so it can be used as a standalone package for any projects needing to
-handle processing of blocks into the bitcoin block chain.
+This package has intentionally been designed so it can be used as a standalone
+package for any projects needing to handle processing of blocks into the bitcoin
+block chain.
 
 ## Documentation
 
 [![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)]
-(http://godoc.org/github.com/btcsuite/btcchain)
+(http://godoc.org/github.com/btcsuite/btcd/blockchain)
 
 Full `go doc` style documentation for the project can be viewed online without
 installing this package by using the GoDoc site here:
-http://godoc.org/github.com/btcsuite/btcchain
+http://godoc.org/github.com/btcsuite/btcd/blockchain
 
 You can also view the documentation locally once the package is installed with
 the `godoc` tool by running `godoc -http=":6060"` and pointing your browser to
-http://localhost:6060/pkg/github.com/btcsuite/btcchain
+http://localhost:6060/pkg/github.com/btcsuite/btcd/blockchain
 
 ## Installation
 
 ```bash
-$ go get github.com/btcsuite/btcchain
+$ go get github.com/btcsuite/btcd/blockchain
 ```
 
 ## Bitcoin Chain Processing Overview
@@ -77,27 +75,23 @@ is by no means exhaustive:
 ## Examples
 
 * [ProcessBlock Example]
-  (http://godoc.org/github.com/btcsuite/btcchain#example-BlockChain-ProcessBlock)  
+  (http://godoc.org/github.com/btcsuite/btcd/blockchain#example-BlockChain-ProcessBlock)  
   Demonstrates how to create a new chain instance and use ProcessBlock to
   attempt to attempt add a block to the chain.  This example intentionally
   attempts to insert a duplicate genesis block to illustrate how an invalid
   block is handled.
 
 * [CompactToBig Example]
-  (http://godoc.org/github.com/btcsuite/btcchain#example-CompactToBig)  
+  (http://godoc.org/github.com/btcsuite/btcd/blockchain#example-CompactToBig)  
   Demonstrates how to convert the compact "bits" in a block header which
   represent the target difficulty to a big integer and display it using the
   typical hex notation.
 
 * [BigToCompact Example]
-  (http://godoc.org/github.com/btcsuite/btcchain#example-BigToCompact)  
+  (http://godoc.org/github.com/btcsuite/btcd/blockchain#example-BigToCompact)  
   Demonstrates how to convert how to convert a target difficulty into the
   compact "bits" in a block header which represent that target difficulty.
 
-## TODO
-
-- Increase test coverage
-
 ## GPG Verification Key
 
 All official release tags are signed by Conformal so users can ensure the code
@@ -121,5 +115,5 @@ signature perform the following:
 ## License
 
 
-Package btcchain is licensed under the [copyfree](http://copyfree.org) ISC
+Package blockchain is licensed under the [copyfree](http://copyfree.org) ISC
 License.

accept.go → blockchain/accept.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain
+package blockchain
 
 import (
 	"fmt"

blocklocator.go → blockchain/blocklocator.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain
+package blockchain
 
 import (
 	"github.com/btcsuite/btcwire"

chain.go → blockchain/chain.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain
+package blockchain
 
 import (
 	"container/list"

chain_test.go → blockchain/chain_test.go

@@ -2,12 +2,12 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain_test
+package blockchain_test
 
 import (
 	"testing"
 
-	"github.com/btcsuite/btcchain"
+	"github.com/btcsuite/btcd/blockchain"
 	"github.com/btcsuite/btcnet"
 	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcwire"
@@ -46,12 +46,12 @@ func TestHaveBlock(t *testing.T) {
 	// Since we're not dealing with the real block chain, disable
 	// checkpoints and set the coinbase maturity to 1.
 	chain.DisableCheckpoints(true)
-	btcchain.TstSetCoinbaseMaturity(1)
+	blockchain.TstSetCoinbaseMaturity(1)
 
-	timeSource := btcchain.NewMedianTime()
+	timeSource := blockchain.NewMedianTime()
 	for i := 1; i < len(blocks); i++ {
 		isOrphan, err := chain.ProcessBlock(blocks[i], timeSource,
-			btcchain.BFNone)
+			blockchain.BFNone)
 		if err != nil {
 			t.Errorf("ProcessBlock fail on block %v: %v\n", i, err)
 			return
@@ -65,7 +65,7 @@ func TestHaveBlock(t *testing.T) {
 
 	// Insert an orphan block.
 	isOrphan, err := chain.ProcessBlock(btcutil.NewBlock(&Block100000),
-		timeSource, btcchain.BFNone)
+		timeSource, blockchain.BFNone)
 	if err != nil {
 		t.Errorf("Unable to process block: %v", err)
 		return

checkpoints.go → blockchain/checkpoints.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain
+package blockchain
 
 import (
 	"fmt"

common_test.go → blockchain/common_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain_test
+package blockchain_test
 
 import (
 	"compress/bzip2"
@@ -13,7 +13,7 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/btcsuite/btcchain"
+	"github.com/btcsuite/btcd/blockchain"
 	"github.com/btcsuite/btcd/database"
 	_ "github.com/btcsuite/btcd/database/ldb"
 	_ "github.com/btcsuite/btcd/database/memdb"
@@ -54,7 +54,7 @@ func isSupportedDbType(dbType string) bool {
 // chainSetup is used to create a new db and chain instance with the genesis
 // block already inserted.  In addition to the new chain instnce, it returns
 // a teardown function the caller should invoke when done testing to clean up.
-func chainSetup(dbName string) (*btcchain.BlockChain, func(), error) {
+func chainSetup(dbName string) (*blockchain.BlockChain, func(), error) {
 	if !isSupportedDbType(testDbType) {
 		return nil, nil, fmt.Errorf("unsupported db type %v", testDbType)
 	}
@@ -116,12 +116,12 @@ func chainSetup(dbName string) (*btcchain.BlockChain, func(), error) {
 		return nil, nil, err
 	}
 
-	chain := btcchain.New(db, &btcnet.MainNetParams, nil)
+	chain := blockchain.New(db, &btcnet.MainNetParams, nil)
 	return chain, teardown, nil
 }
 
 // loadTxStore returns a transaction store loaded from a file.
-func loadTxStore(filename string) (btcchain.TxStore, error) {
+func loadTxStore(filename string) (blockchain.TxStore, error) {
 	// The txstore file format is:
 	// <num tx data entries> <tx length> <serialized tx> <blk height>
 	// <num spent bits> <spent bits>
@@ -150,10 +150,10 @@ func loadTxStore(filename string) (btcchain.TxStore, error) {
 		return nil, err
 	}
 
-	txStore := make(btcchain.TxStore)
+	txStore := make(blockchain.TxStore)
 	var uintBuf uint32
 	for height := uint32(0); height < numItems; height++ {
-		txD := btcchain.TxData{}
+		txD := blockchain.TxData{}
 
 		// Serialized transaction length.
 		err = binary.Read(r, binary.LittleEndian, &uintBuf)

difficulty.go → blockchain/difficulty.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain
+package blockchain
 
 import (
 	"fmt"

difficulty_test.go → blockchain/difficulty_test.go

@@ -2,13 +2,13 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain_test
+package blockchain_test
 
 import (
 	"math/big"
 	"testing"
 
-	"github.com/btcsuite/btcchain"
+	"github.com/btcsuite/btcd/blockchain"
 )
 
 func TestBigToCompact(t *testing.T) {
@@ -22,7 +22,7 @@ func TestBigToCompact(t *testing.T) {
 
 	for x, test := range tests {
 		n := big.NewInt(test.in)
-		r := btcchain.BigToCompact(n)
+		r := blockchain.BigToCompact(n)
 		if r != test.out {
 			t.Errorf("TestBigToCompact test #%d failed: got %d want %d\n",
 				x, r, test.out)
@@ -40,7 +40,7 @@ func TestCompactToBig(t *testing.T) {
 	}
 
 	for x, test := range tests {
-		n := btcchain.CompactToBig(test.in)
+		n := blockchain.CompactToBig(test.in)
 		want := big.NewInt(test.out)
 		if n.Cmp(want) != 0 {
 			t.Errorf("TestCompactToBig test #%d failed: got %d want %d\n",
@@ -61,7 +61,7 @@ func TestCalcWork(t *testing.T) {
 	for x, test := range tests {
 		bits := uint32(test.in)
 
-		r := btcchain.CalcWork(bits)
+		r := blockchain.CalcWork(bits)
 		if r.Int64() != test.out {
 			t.Errorf("TestCalcWork test #%d failed: got %v want %d\n",
 				x, r.Int64(), test.out)

doc.go → blockchain/doc.go

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 /*
-Package btcchain implements bitcoin block handling and chain selection rules.
+Package blockchain implements bitcoin block handling and chain selection rules.
 
 The bitcoin block handling and chain selection rules are an integral, and quite
 likely the most important, part of bitcoin.  Unfortunately, at the time of
@@ -64,11 +64,11 @@ is by no means exhaustive:
 Errors
 
 Errors returned by this package are either the raw errors provided by underlying
-calls or of type btcchain.RuleError.  This allows the caller to differentiate
+calls or of type blockchain.RuleError.  This allows the caller to differentiate
 between unexpected errors, such as database errors, versus errors due to rule
 violations through type assertions.  In addition, callers can programmatically
 determine the specific rule violation by examining the ErrorCode field of the
-type asserted btcchain.RuleError.
+type asserted blockchain.RuleError.
 
 Bitcoin Improvement Proposals
 
@@ -78,4 +78,4 @@ This package includes spec changes outlined by the following BIPs:
 		BIP0030 (https://en.bitcoin.it/wiki/BIP_0030)
 		BIP0034 (https://en.bitcoin.it/wiki/BIP_0034)
 */
-package btcchain
+package blockchain

error.go → blockchain/error.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package btcchain
+package blockchain
 
 import (
 	"fmt"