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Initial checkin of BitCoinJ

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+To get started, ensure you have the latest JDK installed and then just run "ant".
+- A JAR will be placed in dist/
+- JavaDocs will be placed in docs/
+- Unit tests will be run
+Now ensure you're running a BitCoin node locally and run the example app:
+ cd out
+ java
+It will print a BitCoin address. If you send coins to it, you should get them back a few minutes later when a block is solved.
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+Here is a brief list of things that still need to be done.
+More unit tests:
+ - Implement more unit tests for block chain functionality
+ - Create a MockNetworkConnection and use it to test the Peer.
+ - Properly support multiple chains
+ - Start up faster
+ - Store a block locator in the wallet
+ - Parse the stored headers at startup, then download the rest
+ - Provide a seed node list in the NetworkParameters.
+ - Implement tx fees.
+ - Support import of private keys and then extracting its transactions from the block chain.
+ - Longer term potentially add a getmerklebranch protocol command so we can check 0-confirmation transactions.
+ - Implement a simple Swing GUI payment app.
+ - Find a way to avoid some horrid hacks when shutting down the network connection.
+ - Implement a BitCoin class that encapsulates a BigInteger and formatting.
+ - Make NetworkParameters use subclasses instead of static methods to construct.
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+<?xml version="1.0" encoding="UTF-8"?>
+<project name="bitcoinj" default="all">
+ <target name="init">
+ <tstamp/>
+ <mkdir dir="out"/>
+ <mkdir dir="docs"/>
+ </target>
+ <target name="compile" depends="init">
+ <javac destdir="out" includeantruntime="no">
+ <src path="src"/>
+ <src path="tests"/>
+ <classpath path="lib/junit-4.8.2.jar"/>
+ </javac>
+ </target>
+ <target name="docs" depends="init">
+ <javadoc sourcepath="src"
+ excludepackagenames="*"
+ destdir="docs"/>
+ </target>
+ <target name="test" depends="compile">
+ <junit showoutput="false">
+ <classpath path="lib/junit-4.8.2.jar:out"/>
+ <batchtest>
+ <fileset dir="tests"><include name="**/*.java"/></fileset>
+ <formatter type="brief" usefile="no"/>
+ </batchtest>
+ </junit>
+ </target>
+ <target name="dist" depends="compile">
+ <mkdir dir="dist"/>
+ <jar jarfile="dist/bitcoinj-${DSTAMP}.jar" basedir="out"/>
+ </target>
+ <target name="all" depends="dist,docs,test"/>
+ <target name="clean">
+ <delete dir="out"/>
+ <delete dir="dist"/>
+ <delete dir="docs"/>
+ </target>
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">
+<!-- Generated by javadoc (build 1.6.0_22) on Mon Mar 07 11:12:18 CET 2011 -->
+All Classes
+<META NAME="date" CONTENT="2011-03-07">
+<LINK REL ="stylesheet" TYPE="text/css" HREF="stylesheet.css" TITLE="Style">
+<BODY BGCOLOR="white">
+<FONT size="+1" CLASS="FrameHeadingFont">
+<B>All Classes</B></FONT>
+<TD NOWRAP><FONT CLASS="FrameItemFont"><A HREF="com/google/bitcoin/core/Address.html" title="class in" target="classFrame">Address</A>
+<A HREF="com/google/bitcoin/core/AddressFormatException.html" title="class in" target="classFrame">AddressFormatException</A>
+<A HREF="com/google/bitcoin/core/AddressMessage.html" title="class in" target="classFrame">AddressMessage</A>
+<A HREF="com/google/bitcoin/core/Base58.html" title="class in" target="classFrame">Base58</A>
+<A HREF="com/google/bitcoin/core/Block.html" title="class in" target="classFrame">Block</A>
+<A HREF="com/google/bitcoin/core/BlockChain.html" title="class in" target="classFrame">BlockChain</A>
+<A HREF="com/google/bitcoin/core/ECKey.html" title="class in" target="classFrame">ECKey</A>
+<A HREF="com/google/bitcoin/core/GetBlocksMessage.html" title="class in" target="classFrame">GetBlocksMessage</A>
+<A HREF="com/google/bitcoin/core/GetDataMessage.html" title="class in" target="classFrame">GetDataMessage</A>
+<A HREF="com/google/bitcoin/core/InventoryItem.html" title="class in" target="classFrame">InventoryItem</A>
+<A HREF="com/google/bitcoin/core/InventoryItem.Type.html" title="enum in" target="classFrame">InventoryItem.Type</A>
+<A HREF="com/google/bitcoin/core/InventoryMessage.html" title="class in" target="classFrame">InventoryMessage</A>
+<A HREF="com/google/bitcoin/core/Message.html" title="class in" target="classFrame">Message</A>
+<A HREF="com/google/bitcoin/core/NetworkConnection.html" title="class in" target="classFrame">NetworkConnection</A>
+<A HREF="com/google/bitcoin/core/NetworkParameters.html" title="class in" target="classFrame">NetworkParameters</A>
+<A HREF="com/google/bitcoin/core/Peer.html" title="class in" target="classFrame">Peer</A>
+<A HREF="com/google/bitcoin/core/PeerAddress.html" title="class in" target="classFrame">PeerAddress</A>
+<A HREF="com/google/bitcoin/examples/PingService.html" title="class in" target="classFrame">PingService</A>
+<A HREF="com/google/bitcoin/examples/PrivateKeys.html" title="class in" target="classFrame">PrivateKeys</A>
+<A HREF="com/google/bitcoin/core/ProtocolException.html" title="class in" target="classFrame">ProtocolException</A>
+<A HREF="com/google/bitcoin/core/Script.html" title="class in" target="classFrame">Script</A>
+<A HREF="com/google/bitcoin/core/ScriptException.html" title="class in" target="classFrame">ScriptException</A>
+<A HREF="com/google/bitcoin/core/Transaction.html" title="class in" target="classFrame">Transaction</A>
+<A HREF="com/google/bitcoin/core/Transaction.SigHash.html" title="enum in" target="classFrame">Transaction.SigHash</A>
+<A HREF="com/google/bitcoin/core/TransactionInput.html" title="class in" target="classFrame">TransactionInput</A>
+<A HREF="com/google/bitcoin/core/TransactionOutPoint.html" title="class in" target="classFrame">TransactionOutPoint</A>
+<A HREF="com/google/bitcoin/core/TransactionOutput.html" title="class in" target="classFrame">TransactionOutput</A>
+<A HREF="com/google/bitcoin/core/UnknownMessage.html" title="class in" target="classFrame">UnknownMessage</A>
+<A HREF="com/google/bitcoin/core/Utils.html" title="class in" target="classFrame">Utils</A>
+<A HREF="com/google/bitcoin/core/VarInt.html" title="class in" target="classFrame">VarInt</A>
+<A HREF="com/google/bitcoin/core/VerificationException.html" title="class in" target="classFrame">VerificationException</A>
+<A HREF="com/google/bitcoin/core/VersionMessage.html" title="class in" target="classFrame">VersionMessage</A>
+<A HREF="com/google/bitcoin/core/Wallet.html" title="class in" target="classFrame">Wallet</A>
+<A HREF="com/google/bitcoin/core/WalletEventListener.html" title="interface in" target="classFrame"><I>WalletEventListener</I></A>
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