Implemented donate contract (with address registrar)

.travis.yml

@@ -3,9 +3,14 @@ node_js:
   - "8"
 
 install:
- - npm install truffle
  - npm install
 
 script:
  - make build
+ - make ganache > ganache.log &
+ - sleep 5s
+ - make migrate
  - make test
+
+after_script:
+ - cat ganache.log

Makefile

@@ -1,7 +1,22 @@
 .PHONY: build test
 
 build:
-	truffle compile
+	npx truffle compile
+
+develop:
+	npx truffle develop
+
+ganache:
+	npx ganache-cli --port 9545
+
+stop-develop:
+	kill $$(ps -x | grep ganache | awk '{print $$1;}')
+
+migrate:
+	npx truffle migrate
 
 test:
-	truffle test
+	npx truffle test
+
+clean:
+	rm -r build

README.md

@@ -5,6 +5,25 @@ Ethereum contracts used by Thankful.
 
 [![Build Status](https://travis-ci.org/SuperuserLabs/thankful-contracts.svg?branch=master)](https://travis-ci.org/SuperuserLabs/thankful-contracts)
 
+## How to develop
+
+```sh
+npm install
+make build
+make develop  # start a development chain
+make migrate  # runs migrations
+make test  # run tests
+```
+
+
+For details about how to debug, see this guide: https://truffleframework.com/tutorials/debugging-a-smart-contract
+
+Summary of the guide:
+
+```sh
+npx truffle debug <txid>
+```
+
 
 ## Guides
 

contracts/AddressRegistrar.sol

@@ -0,0 +1,30 @@
+pragma solidity ^0.4.24;
+
+import './AddressRegistrar.sol';
+
+contract AddressRegistrar {
+    // TODO: Make contract extend Ownable (for onlyOwner modifiers etc.)
+    // https://medium.com/codexprotocol/a-simple-framework-for-deploying-ownable-contracts-63ed4bd3c657
+    // The owner is the verifier
+    address public owner;
+
+    mapping(string => Creator) creators;
+
+    constructor() public {
+        owner = msg.sender;
+    }
+
+    struct Creator {
+        address addr;
+    }
+
+    // Associate an email with a wallet address
+    function associate(string _email, address _address) public {
+        require(msg.sender == owner);
+        creators[_email].addr = _address;
+    }
+
+    function getAddressByEmail(string _email) public constant returns (address) {
+        return creators[_email].addr;
+    }
+}

contracts/DonationHandler.sol

@@ -0,0 +1,61 @@
+pragma solidity ^0.4.24;
+
+import './AddressRegistrar.sol';
+
+contract DonationHandler {
+    address public owner;
+    AddressRegistrar public registrar;
+
+    mapping(string => PendingDonations) pending;
+
+    constructor(AddressRegistrar _registrar) public {
+        owner = msg.sender;
+        registrar = _registrar;
+    }
+
+    struct Donation {
+        address sender;
+        uint amount;
+        uint256 expires;
+    }
+
+    struct PendingDonations {
+        Donation[] donations;
+        uint n_pending;
+        uint refunded;
+    }
+
+    // Donate to a creator, add to pending if email has no connected address.
+    function donate(string _email, uint32 _expires_in) public payable {
+        require(msg.value > 0);
+        address _addr = registrar.getAddressByEmail(_email);
+        if(_addr != 0x0) {
+            _addr.transfer(msg.value);
+        } else {
+            pending[_email].donations.push(Donation(msg.sender, msg.value, now + _expires_in));
+            pending[_email].n_pending++;
+        }
+    }
+
+    // Refund pending transaction that has expired
+    function refund(string _email, uint32 _pending_idx) public {
+        require(now > pending[_email].donations[_pending_idx].expires);
+        delete pending[_email].donations[_pending_idx];
+        pending[_email].refunded++;
+    }
+
+    // Pay out last pending transaction for creator if email has an assigned address
+    function payOut(string _email) public returns (bool) {
+        address _addr = registrar.getAddressByEmail(_email);
+        require(_addr != 0x0 && pending[_email].n_pending > 0);
+        Donation storage d = pending[_email].donations[idx];
+        if(d.amount != 0x0) {
+            uint idx = pending[_email].n_pending - 1;
+            _addr.transfer(d.amount);
+            return true;
+        } else {
+            pending[_email].n_pending--;
+            return false;
+        }
+    }
+}

contracts/SupporterToken.sol

@@ -1,8 +1,8 @@
 pragma solidity ^0.4.24;
 
-import 'openzeppelin-solidity/contracts/ownership/Ownable.sol';
+// import 'openzeppelin-solidity/contracts/ownership/Ownable.sol';
 
-contract SupporterToken is Ownable {
+contract SupporterToken /*is Ownable*/ {
     // Nothing here yet
     // Will be a ERC721 token, see this issue: https://github.com/SuperuserLabs/thankful/issues/3
 }

migrations/2_deploy_contracts.js

@@ -0,0 +1,8 @@
+let AddressRegistrar = artifacts.require("AddressRegistrar");
+let DonationHandler = artifacts.require("DonationHandler");
+
+module.exports = async function(deployer) {
+    deployer.deploy(AddressRegistrar).then(() => {
+        return deployer.deploy(DonationHandler, AddressRegistrar.address);
+    });
+};