Add meshstdtoken

contracts/MeshStandardToken.sol

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+/*
+This Token Contract implements the standard token functionality (https://github.com/ethereum/EIPs/issues/20) as well as the following OPTIONAL extras intended for use by mesh organizations.
+
+In other words. This is intended for deployment in something like a Token Factory or Mist wallet, and then used by humans performing within mesh organizations.
+Imagine coins, currencies, shares, voting weight, etc.
+Machine-based, rapid creation of many tokens would not necessarily need these extra features or will be minted in other manners.
+
+1) Initial Finite Supply (upon creation one specifies how much is minted).
+2) In the absence of a token registry: Optional Decimal, Symbol & Name.
+3) Optional approveAndCall() functionality to notify a contract if an approval() has occurred.
+
+.*/
+pragma solidity ^0.4.4;
+
+import "./StandardToken.sol";
+
+contract MeshStandardToken is StandardToken {
+
+    function () {
+        //if ether is sent to this address, send it back.
+        throw;
+    }
+
+    /* Public variables of the token */
+
+    /*
+    NOTE:
+    The following variables are OPTIONAL vanities. One does not have to include them.
+    They allow one to customise the token contract & in no way influences the core functionality.
+    Some wallets/interfaces might not even bother to look at this information.
+    */
+    string public name;                   //fancy name: eg Simon Bucks
+    uint8 public decimals;                //How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.
+    string public symbol;                 //An identifier: eg SBX
+    string public version = 'M0.1';       //mesh 0.1 standard. Just an arbitrary versioning scheme.
+
+    function MeshStandardToken(
+        uint256 _initialAmount,
+        string _tokenName,
+        uint8 _decimalUnits,
+        string _tokenSymbol
+        ) {
+        balances[msg.sender] = _initialAmount;               // Give the creator all initial tokens
+        totalSupply = _initialAmount;                        // Update total supply
+        name = _tokenName;                                   // Set the name for display purposes
+        decimals = _decimalUnits;                            // Amount of decimals for display purposes
+        symbol = _tokenSymbol;                               // Set the symbol for display purposes
+    }
+
+    /* Approves and then calls the receiving contract */
+    function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
+        allowed[msg.sender][_spender] = _value;
+        Approval(msg.sender, _spender, _value);
+
+        //call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
+        //receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
+        //it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
+        if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
+        return true;
+    }
+}

contracts/Migrations.sol

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+pragma solidity ^0.4.4;
+
+contract Migrations {
+  address public owner;
+  uint public last_completed_migration;
+
+  modifier restricted() {
+    if (msg.sender == owner) _;
+  }
+
+  function Migrations() {
+    owner = msg.sender;
+  }
+
+  function setCompleted(uint completed) restricted {
+    last_completed_migration = completed;
+  }
+
+  function upgrade(address new_address) restricted {
+    Migrations upgraded = Migrations(new_address);
+    upgraded.setCompleted(last_completed_migration);
+  }
+}

contracts/test/SampleRecipientSuccess.sol

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+/*
+This is an example contract that helps test the functionality of the approveAndCall() functionality of HumanStandardToken.sol.
+This one assumes successful receival of approval.
+*/
+pragma solidity ^0.4.8;
+
+contract SampleRecipientSuccess {
+  /* A Generic receiving function for contracts that accept tokens */
+  address public from;
+  uint256 public value;
+  address public tokenContract;
+  bytes public extraData;
+
+  event ReceivedApproval(uint256 _value);
+
+  function receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData) {
+    from = _from;
+    value = _value;
+    tokenContract = _tokenContract;
+    extraData = _extraData;
+    ReceivedApproval(_value);
+  }
+}

contracts/test/SampleRecipientThrow.sol

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+/*
+This is an example contract that helps test the functionality of the approveAndCall() functionality of HumanStandardToken.sol.
+This one will throw and thus needs to propagate the error up.
+*/
+pragma solidity ^0.4.8;
+
+contract SampleRecipientThrow {
+  function () {
+    throw;
+  }
+}

migrations/1_initial_migration.js

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+var Migrations = artifacts.require("./Migrations.sol");
+
+module.exports = function(deployer) {
+  deployer.deploy(Migrations);
+};

migrations/2_deploy_contracts.js

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+var MeshStandardToken = artifacts.require("./MeshStandardToken.sol");
+var HumanStandardToken = artifacts.require("./HumanStandardToken.sol");
+
+module.exports = function(deployer) {
+  deployer.deploy(MeshStandardToken);
+  deployer.deploy(HumanStandardToken);
+};