1. Incorporated nonce into transactions being signed via Geth/Parity nodes

2. Created EIP-20 standard token integration test
3. Created Greeter integration test
4. Addressed bug where function encoder wouldn't process "0x" properly if return arguments were expected
5. Created Credentials container for account credentials
6. Added additional smart contract source code
7. Created Smart Contract documentation section
8. Created troubleshooting documentation section
9. Updates to transaction documentation
10. Cleaned up layout of source files for other documentation files.
11. Bumped version.

Author: conor10

Diff for: README.md

@@ -1,4 +1,4 @@
-# web3j: Web3 Java Ðapp API
+# web3j: Web3 Java Ethereum Ðapp API
 
 [![Documentation Status](https://readthedocs.org/projects/web3j/badge/?version=latest)](http://web3j.readthedocs.io/en/latest/?badge=latest)
 [![Build Status](https://travis-ci.org/web3j/web3j.svg?branch=master)](https://travis-ci.org/web3j/web3j)
@@ -31,14 +31,14 @@ Add the following dependency to your project:
 <dependency>
   <groupId>org.web3j</groupId>
   <artifactId>core</artifactId>
-  <version>0.5.5</version>
+  <version>0.6.0</version>
 </dependency>
 ```
 
 ### Gradle
 
 ```groovy
-compile ('org.web3j:core:0.5.5')
+compile ('org.web3j:core:0.6.0')
 ```
 
 Start up an Ethereum client if you don't already have one running, such as [Geth](https://github.com/ethereum/go-ethereum/wiki/geth):

Diff for: build.gradle

@@ -23,7 +23,7 @@ apply plugin: 'idea'
 apply plugin: 'io.codearte.nexus-staging'
 
 group 'org.web3j'
-version '0.5.5'
+version '0.6.0'
 
 sourceCompatibility = 1.8
 

Diff for: docs/source/filters.rst

@@ -1,4 +1,4 @@
-Working with Filters
-====================
+Filters
+=======
 
-Please refer to `org.web3j.protocol.scenarios.EventFilterIT <https://github.com/web3j/web3j/blob/master/src/integration-test/java/org/web3j/protocol/scenarios/EventFilterIT.java>`_ for an example of how to do this until this section is written.
+Please refer to `EventFilterIT <https://github.com/web3j/web3j/blob/master/src/integration-test/java/org/web3j/protocol/scenarios/EventFilterIT.java>`_ for an example of how to do this until this section is written.

Diff for: docs/source/getting_started.rst

@@ -7,17 +7,19 @@ Maven
 -----
 
 .. code-block:: xml
+
    <dependency>
      <groupId>org.web3j</groupId>
      <artifactId>core</artifactId>
-     <version>0.5.5</version>
+     <version>0.6.0</version>
    </dependency>
 
 Gradle
 ------
 
 .. code-block:: groovy
-   compile ('org.web3j:core:0.5.5')
+
+   compile ('org.web3j:core:0.6.0')
 
 
 Start a client
@@ -67,6 +69,11 @@ To use client admin commands::
 
 Further details
 ---------------
-- web3j provides type safe access to all responses. Optional or null responses are wrapped in Java 8's `Optional <https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html>`_ type.
-- Async requests are handled using Java 8's `CompletableFutures <https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html>`_.
-- Quantity payload types are returned as `BigIntegers <https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html>`_. For simple results, you can obtain the quantity as a String via `org.web3j.protocol.core.Response <https://github.com/web3j/web3j/blob/master/src/main/java/org/web3j/protocol/core/Response.java>`_.getResult().
+- web3j provides type safe access to all responses. Optional or null responses are wrapped in
+  Java 8's
+  `Optional <https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html>`_ type.
+- Async requests are handled using Java 8's
+  `CompletableFutures <https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html>`_.
+- Quantity payload types are returned as `BigIntegers <https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html>`_.
+  For simple results, you can obtain the quantity as a String via
+  `Response <https://github.com/web3j/web3j/blob/master/src/main/java/org/web3j/protocol/core/Response.java>`_.getResult().

Diff for: docs/source/images/pending_transaction.png

@@ -42,15 +42,15 @@ Contents:
 
    introduction.rst
    getting_started.rst
-   contract_creation.rst
    transactions.rst
+   smart_contracts.rst
    filters.rst
    callbacks.rst
-   solidity_wrappers.rst
    rlp.rst
    abi.rst
    management_apis.rst
    infura.rst
+   trouble.rst
    development.rst
    links.rst
    credits.rst

Diff for: docs/source/index.rst

@@ -18,19 +18,23 @@ Test Ethereum Network (Morden):
 Certificate installation
 ------------------------
 
-As the Infura nodes are accessed over TLS, you will need to install the relevant certificates into your Java Virtual Machine's keystore.
+As the Infura nodes are accessed over TLS, you will need to install the relevant certificates into
+your Java Virtual Machine's keystore.
 
-You can obtain the certificate using the `Firefox <https://www.mozilla.org/en-US/firefox/new/>`_ web browser:
+You can obtain the certificate using the `Firefox <https://www.mozilla.org/en-US/firefox/new/>`_
+web browser:
 
 .. image:: /images/infura_cert.png
 
-Alternatively, you can use SSL (this will only download the first certificate in the chain, which should be adequate).
+Alternatively, you can use SSL (this will only download the first certificate in the chain, which
+should be adequate).
 
 .. code-block:: bash
 
    $ openssl s_client -connect morden.infura.io:443 -showcerts </dev/null 2>/dev/null|openssl x509 -outform PEM > infura-morden.pem
 
-Once you have downloaded it, then install it into your keystore (for Windows/Linux hosts the paths will differ slightly):
+Once you have downloaded it, then install it into your keystore (for Windows/Linux hosts the paths
+will differ slightly):
 
 .. code-block:: bash
 
@@ -53,12 +57,16 @@ You can now use Infura to work with the Ethereum blockchain.
    Parity//v1.3.5-beta/x86_64-linux-gnu/rustc1.12.0
 
 
-If you want to test a number of the JSON-RPC calls against Infura, update the integration test `org.web3j.protocol.core.CoreIT <https://github.com/web3j/web3j/blob/master/src/integration-test/java/org/web3j/protocol/core/CoreIT.java>`_ with your Infura URL & run it.
+If you want to test a number of the JSON-RPC calls against Infura, update the integration test
+`CoreIT <https://github.com/web3j/web3j/blob/master/src/integration-test/java/org/web3j/protocol/core/CoreIT.java>`_
+with your Infura URL & run it.
 
 
 Transactions
 ------------
 
-In order to transact with Infura nodes, you will need to create and sign transactions offline before sending them, as Infura nodes have no visibility of your encrypted Ethereum key files, which are required to unlock accounts via the Personal Geth/Parity admin commands.
+In order to transact with Infura nodes, you will need to create and sign transactions offline
+before sending them, as Infura nodes have no visibility of your encrypted Ethereum key files, which
+are required to unlock accounts via the Personal Geth/Parity admin commands.
 
 Refer to the :doc:`signing_transactions` and :doc:`management_apis` sections for further details.

Diff for: docs/source/infura.rst

@@ -4,10 +4,13 @@ Links and Useful Resources
 - Ethereum `Homestead Documentation <https://ethereum-homestead.readthedocs.io/en/latest/>`_
 - Ethereum `Wiki <https://github.com/ethereum/wiki/wiki>`_
 - Ethereum `JSON-RPC specification <https://github.com/ethereum/wiki/wiki/JSON-RPC>`_
-- Ethereum `Yellow Paper <gavwood.com/paper.pdf>`_ and `GitHub <https://github.com/ethereum/yellowpaper>`_ repository
+- Ethereum `Yellow Paper <gavwood.com/paper.pdf>`_ and
+  `GitHub <https://github.com/ethereum/yellowpaper>`_ repository
 - `Homestead <https://ethereum-homestead.readthedocs.org/en/latest/>`_ docs
 - `Solidity <http://solidity.readthedocs.io/en/develop/>`_ docs
 - `Ethereum tests <https://github.com/ethereum/tests>`_ contains lots of common tests for clients
-- `Etherscan <https://etherscan.io>`_ is very useful for exploring blocks and transactions, it also has a `testnet site <https://testnet.etherscan.io>`_
-- `Ethstats <https://ethstats.net/>`_ provides a useful network dashboard
+- `Etherscan <https://etherscan.io>`_ is very useful for exploring blocks and transactions, it also
+  has a `testnet site <https://testnet.etherscan.io>`_
+- `Ethstats <https://ethstats.net/>`_ provides a useful network dashboard. There is also a
+  `testnet dashboard <http://morden.io/>`_, and one for `Parity clients <https://stats.parity.io/>`_.
 - `Ethereum reddit <https://www.reddit.com/r/ethereum/>`_

Diff for: docs/source/links.rst

@@ -18,4 +18,4 @@ As Parity provides a superset of the personal admin commands offered by Geth, yo
        // send a transaction, or use parity.personalSignAndSendTransaction() to do it all in one
    }
 
-Refer to the integration test `org.web3j.protocol.parity.ParityIT <https://github.com/web3j/web3j/blob/master/src/integration-test/java/org/web3j/protocol/parity/ParityIT.java>`_ for further implementation details.
+Refer to the integration test `ParityIT <https://github.com/web3j/web3j/blob/master/src/integration-test/java/org/web3j/protocol/parity/ParityIT.java>`_ for further implementation details.

Diff for: docs/source/management_apis.rst

@@ -0,0 +1,145 @@
+Smart Contracts
+===============
+
+Developers have the choice of three languages for writing smart contracts:
+
+`Solidity <https://solidity.readthedocs.io/>`_
+  The flagship language of Ethereum, and most popular language for smart contracts.
+
+`Serpent <https://github.com/ethereum/wiki/wiki/Serpent>`_
+  A Python like language for writing smart contracts.
+
+LISP Like Language (LLL)
+  A low level language, Serpent provides a superset of LLL. There's not a great deal of information
+  for working with LLL, the following blog `/var/log/syrinx <http://blog.syrinx.net/>`_ and
+  associated `Github <https://github.com/zigguratt/lll-resurrected>`_ is a good place to start.
+
+
+In order to deploy a smart contract onto the Ethereum blockchain, it must first be compiled into
+a bytecode format, then it can be sent as part of a transaction request as detailed in
+:ref:`creation-of-smart-contract`.
+
+Given that Solidity is the language of choice for writing smart contracts, it is the language
+supported by web3j, and is used for all subsequent examples.
+
+
+Getting started with Solidity
+-----------------------------
+
+An overview of Solidity is beyond the scope of these docs, however, the following resources are a
+good place to start:
+
+- `Contract Tutorial <https://github.com/ethereum/go-ethereum/wiki/Contract-Tutorial>`_ on the Go
+  Ethereum Wiki
+- `Introduction to Smart Contracts <http://solidity.readthedocs.io/en/develop/introduction-to-smart-contracts.html>`_
+  in the Solidity project documentation
+- `Writing a contract <https://ethereum-homestead.readthedocs.io/en/latest/contracts-and-transactions/contracts.html#writing-a-contract>`_
+  in the Ethereum Homestead Guide
+
+
+Compiling Solidity source code
+------------------------------
+
+Compilation to bytecode is performed by the Solidity compiler, *solc*. You can install the compiler,
+locally following the instructions as per
+`the project documentation <https://solidity.readthedocs.io/en/latest/installing-solidity.html>`_.
+
+To compile the solidity code run:
+
+.. code-block:: bash
+
+   $ solc <contract>.sol --bin --abi --optimize -o <output-dir>/
+
+**Note**: there are issues with installing solc via homebrew on OS X currently, please see the
+following `thread <https://github.com/ethereum/cpp-ethereum/issues/3173#issuecomment-255991056>`_
+for further information.
+
+The *--bin* and *--abi* compiler arguments are both required to take full advantage of working
+with smart contracts from web3j.
+
+*--bin*
+  Outputs a Solidity binary file containing the hex-encoded binary to provide with the transaction
+  request (as per :ref:`creation-of-smart-contract`).
+
+*--abi*
+  Outputs a solidity application binary interface (ABI) file which details all of the publicly
+  acessible contract methods and their associated parameters. These details along with the
+  contract address are crucial for interacting with smart contracts. The ABI file is also used for
+  the generation of :ref:`smart-contract-wrappers`.
+
+There is also a *--gas* argument for providing estimates of the :ref:`gas` required to create a
+contract and transact with its methods.
+
+
+Alternatively, you can write and compile solidity code in your browser via the
+`Browser-Solidity <https://ethereum.github.io/browser-solidity/>`_. Browser-Solidity is great for
+smaller smart contracts, but you may run into issues working with larger contracts.
+
+You can also compile solidity code via Ethereum clients such as Geth and Parity, using the JSON-RPC
+method `eth_compileSolidity <https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_compilesolidity>`_
+which is also supported in web3j. However, the Solidity compiler must be installed on the client
+for this to work.
+
+There are further options available, please refer to the
+`relevant section <https://ethereum-homestead.readthedocs.io/en/latest/contracts-and-transactions/contracts.html#compiling-a-contract>`_
+in the Homestead documentation.
+
+
+Deploying and interacting with smart contracts
+-------------------------------------
+
+Please refer to the sections :ref:`creation-of-smart-contract`, :ref:`transacting-with-contract`
+and :ref:`querying-state` for details.
+
+
+Smart contract examples
+-----------------------
+
+web3j provides a number of smart contract examples in the project directory
+`src/test/resources/solidity <https://github.com/web3j/web3j/tree/master/src/test/resources/solidity>`_
+
+It also provides integration tests for demonstrating the deploying and working with those smart
+contracts in the project directory
+`src/integration-test/java/org/web3j/protocol/scenarios <https://github.com/web3j/web3j/tree/master/src/integration-test/java/org/web3j/protocol/scenarios>`_.
+
+
+EIP-20 Ethereum token standard smart contract
+---------------------------------------------
+
+There is an active `Ethereum Improvement Proposal (EIP) <https://github.com/ethereum/EIPs>`_,
+`EIP-20 <https://github.com/ethereum/EIPs/issues/20>`_ that has been created to define the standard
+functions that a smart contract providing tokens can implement.
+
+The EIP-20 proposal provides function definitions, but does not provide an implementation example.
+However, there is an implementation provided in
+`src/test/resources/solidity/contracts <https://github.com/web3j/web3j/tree/master/src/test/resources/solidity/contracts>`_,
+which has been taken from Consensys' implementation on
+`GitHub <https://github.com/ConsenSys/Tokens>`_.
+
+The integration test
+`HumanStandardTokenIT <https://github.com/web3j/web3j/tree/master/src/integration-test/java/org/web3j/protocol/scenarios/HumanStandardTokenIT.java>`_.
+has been been written to fully demonstrate the functionality of this token standard smart contract.
+
+
+.. _smart-contract-wrappers:
+
+Solidity smart contract wrappers
+--------------------------------
+
+web3j supports the auto-generation of smart contract function wrappers in Java from Solidity ABI files.
+
+This can be achieved by running:
+
+.. code-block:: bash
+
+   org.web3j.codegen.SolidityFunctionWrapperGenerator /path/to/<smart-contract>.abi -o /path/to/src/dir/java -p com.your.organisation.name
+
+See `FunctionWrappersIT <https://github.com/web3j/web3j/blob/master/src/integration-test/java/org/web3j/protocol/scenarios/FunctionWrappersIT.java>`_
+for an example of using a generated smart contract Java wrapper.
+
+**Note:** at present the wrappers invoke smart contracts via
+`EthCall <https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_call>`_,
+so a transaction does not take place. Transaction support is imminent.
+
+For an example of how to call a smart contracts via a transaction, refer to
+`DeployContractIT <https://github.com/web3j/web3j/blob/master/src/integration-test/java/org/web3j/protocol/scenarios/DeployContractIT.java>`_.