Merge pull request 'Add export/import functionality' (#224) from feature/export-import into master

Reviewed-on: #224

.drone.yml

@@ -24,7 +24,7 @@ steps:
 - name: build contracts
   image: gitea.kosmos.org/kredits/docker-ci:latest
   commands:
-  - su drone -c 'npm run devchain' &
+  - su drone -c 'npm run devchain -- --silent' &
   - sleep 5
   - su drone -c 'npm run build'
   depends_on:
@@ -32,7 +32,7 @@ steps:
 - name: test
   image: gitea.kosmos.org/kredits/docker-ci:latest
   commands:
-  - su drone -c 'npm run devchain' &
+  - su drone -c 'npm run devchain -- --silent' &
   - sleep 5
   - su drone -c 'npm test'
   depends_on:

.eslintignore

@@ -1 +1,2 @@
 /scripts/
+/test/

.gitignore

@@ -5,6 +5,8 @@ node_modules
 yarn-error.log
 .DS_Store
 
+data
+
 cache
 artifacts
 .openzeppelin

contracts/Contribution.sol

@@ -2,10 +2,6 @@ pragma solidity ^0.8.0;
 
 import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
 
-interface IToken {
-  function mintFor(address contributorAccount, uint256 amount, uint32 contributionId) external;
-}
-
 interface ContributorInterface {
   function getContributorAddressById(uint32 contributorId) external view returns (address);
   function getContributorIdByAddress(address contributorAccount) external view returns (uint32);
@@ -16,12 +12,10 @@ interface ContributorInterface {
 
 contract Contribution is Initializable {
   ContributorInterface public contributorContract;
-  IToken public tokenContract;
 
   struct ContributionData {
     uint32 contributorId;
     uint32 amount;
-    bool claimed;
     bytes32 hashDigest;
     uint8 hashFunction;
     uint8 hashSize;
@@ -42,10 +36,16 @@ contract Contribution is Initializable {
   mapping(uint32 => ContributionData) public contributions;
   uint32 public contributionsCount;
 
+  // Confirmation veto period
   uint32 public blocksToWait;
 
+  // The address that deployed the contract
+  address public deployer;
+
+  // Data migration flag
+  bool public migrationDone;
+
   event ContributionAdded(uint32 id, uint32 indexed contributorId, uint32 amount);
-  event ContributionClaimed(uint32 id, uint32 indexed contributorId, uint32 amount);
   event ContributionVetoed(uint32 id, address vetoedByAccount);
 
   modifier onlyCore {
@@ -53,13 +53,19 @@ contract Contribution is Initializable {
     _;
   }
 
+  modifier onlyDeployer {
+    require(msg.sender == deployer, "Deployer only");
+    _;
+  }
+
   function initialize(uint32 blocksToWait_) public initializer {
+    deployer = msg.sender;
+    migrationDone = false;
     blocksToWait = blocksToWait_;
   }
 
-  function setTokenContract(address token) public {
+  function finishMigration() public onlyDeployer {
-    require(address(tokenContract) == address(0) || contributorContract.addressIsCore(msg.sender), "Core only");
+    migrationDone = true;
-    tokenContract = IToken(token);
   }
 
   function setContributorContract(address contributor) public {
@@ -133,14 +139,13 @@ contract Contribution is Initializable {
     }
   }
 
-  function getContribution(uint32 contributionId) public view returns (uint32 id, uint32 contributorId, uint32 amount, bool claimed, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize, uint256 confirmedAtBlock, bool exists, bool vetoed) {
+  function getContribution(uint32 contributionId) public view returns (uint32 id, uint32 contributorId, uint32 amount, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize, uint256 confirmedAtBlock, bool exists, bool vetoed) {
     id = contributionId;
     ContributionData storage c = contributions[id];
     return (
       id,
       c.contributorId,
       c.amount,
-      c.claimed,
       c.hashDigest,
       c.hashFunction,
       c.hashSize,
@@ -150,24 +155,29 @@ contract Contribution is Initializable {
     );
   }
 
-  function add(uint32 amount, uint32 contributorId, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize) public {
+  function add(uint32 amount, uint32 contributorId, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize, uint256 confirmedAtBlock, bool vetoed) public {
     // require(canPerform(msg.sender, ADD_CONTRIBUTION_ROLE, new uint32[](0)), 'nope');
-    require(balanceOf(msg.sender) > 0 || contributorContract.addressIsCore(msg.sender), 'must have kredits or core');
+    // TODO hubot neither has kredits nor a core account
+    require((confirmedAtBlock == 0 && vetoed == false) || migrationDone == false, 'extra arguments during migration only');
+    require(balanceOf(msg.sender) > 0 || contributorContract.addressIsCore(msg.sender), 'requires kredits or core status');
+
     uint32 contributionId = contributionsCount + 1;
     ContributionData storage c = contributions[contributionId];
     c.exists = true;
     c.amount = amount;
-    c.claimed = false;
     c.contributorId = contributorId;
     c.hashDigest = hashDigest;
     c.hashFunction = hashFunction;
     c.hashSize = hashSize;
-    if (contributionId < 10) {
+
-      c.confirmedAtBlock = block.number;
+    if (confirmedAtBlock > 0) {
+      c.confirmedAtBlock = confirmedAtBlock;
     } else {
       c.confirmedAtBlock = block.number + 1 + blocksToWait;
     }
 
+    if (vetoed) { c.vetoed = true; }
+
     contributionsCount++;
 
     contributionOwner[contributionId] = contributorId;
@@ -177,32 +187,15 @@ contract Contribution is Initializable {
   }
 
   function veto(uint32 contributionId) public onlyCore {
-
     ContributionData storage c = contributions[contributionId];
     require(c.exists, 'NOT_FOUND');
-    require(!c.claimed, 'ALREADY_CLAIMED');
     require(block.number < c.confirmedAtBlock, 'VETO_PERIOD_ENDED');
     c.vetoed = true;
 
     emit ContributionVetoed(contributionId, msg.sender);
   }
 
-  function claim(uint32 contributionId) public {
-    ContributionData storage c = contributions[contributionId];
-    require(c.exists, 'NOT_FOUND');
-    require(!c.claimed, 'ALREADY_CLAIMED');
-    require(!c.vetoed, 'VETOED');
-    require(block.number >= c.confirmedAtBlock, 'NOT_CLAIMABLE');
-
-    c.claimed = true;
-    address contributorAccount = getContributorAddressById(c.contributorId);
-    uint256 amount = uint256(c.amount);
-    tokenContract.mintFor(contributorAccount, amount, contributionId);
-    emit ContributionClaimed(contributionId, c.contributorId, c.amount);
-  }
-
   function exists(uint32 contributionId) public view returns (bool) {
     return contributions[contributionId].exists;
   }
-
 }

contracts/Contributor.sol

@@ -2,7 +2,8 @@ pragma solidity ^0.8.0;
 
 import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
 
-interface ITokenBalance {
+interface IToken {
+  function mintFor(address contributorAccount, uint256 amount) external;
   function balanceOf(address contributorAccount) external view returns (uint256);
 }
 interface IContributionBalance {
@@ -11,9 +12,9 @@ interface IContributionBalance {
 }
 
 contract Contributor is Initializable {
-  address deployer;
+  address public deployer;
   IContributionBalance public contributionContract;
-  ITokenBalance public tokenContract;
+  IToken public tokenContract;
 
   struct Contributor {
     address account;
@@ -21,6 +22,7 @@ contract Contributor is Initializable {
     uint8 hashFunction;
     uint8 hashSize;
     bool exists;
+    uint32 kreditsWithdrawn;
   }
 
   mapping (address => uint32) public contributorIds;
@@ -36,6 +38,11 @@ contract Contributor is Initializable {
     _;
   }
 
+  modifier onlyContributors {
+    require(addressExists(msg.sender) && contributionContract.balanceOf(msg.sender) > 0, "Contributors only");
+    _;
+  }
+
   function initialize() public initializer {
     deployer = msg.sender;
   }
@@ -47,7 +54,7 @@ contract Contributor is Initializable {
 
   function setTokenContract(address token) public onlyCore {
     require(address(tokenContract) == address(0) || addressIsCore(msg.sender), "Core only");
-    tokenContract = ITokenBalance(token);
+    tokenContract = IToken(token);
   }
 
   function coreContributorsCount() public view returns (uint32) {
@@ -81,7 +88,7 @@ contract Contributor is Initializable {
   }
 
   function addContributor(address account, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize) public onlyCore {
-    require(!addressExists(account));
+    require(!addressExists(account), "Address already in use");
     uint32 _id = contributorsCount + 1;
     assert(!contributors[_id].exists); // this can not be acually
     Contributor storage c = contributors[_id];
@@ -90,6 +97,7 @@ contract Contributor is Initializable {
     c.hashFunction = hashFunction;
     c.hashSize = hashSize;
     c.account = account;
+    c.kreditsWithdrawn = 0;
     contributorIds[account] = _id;
 
     contributorsCount += 1;
@@ -132,7 +140,7 @@ contract Contributor is Initializable {
     return contributors[id];
   }
 
-  function getContributorById(uint32 _id) public view returns (uint32 id, address account, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize, bool isCore, uint256 balance, uint32 totalKreditsEarned, uint256 contributionsCount, bool exists ) {
+  function getContributorById(uint32 _id) view public returns (uint32 id, address account, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize, bool isCore, uint256 balance, uint32 totalKreditsEarned, uint256 contributionsCount, bool exists, uint256 kreditsWithdrawn) {
     id = _id;
     Contributor storage c = contributors[_id];
     account = c.account;
@@ -144,6 +152,19 @@ contract Contributor is Initializable {
     totalKreditsEarned = contributionContract.totalKreditsEarnedByContributor(_id, true);
     contributionsCount = contributionContract.balanceOf(c.account);
     exists = c.exists;
+    kreditsWithdrawn = c.kreditsWithdrawn;
   }
 
+  function withdraw() public onlyContributors {
+    uint32 id = getContributorIdByAddress(msg.sender);
+    Contributor storage c = contributors[id];
+
+    // TODO check if we need a failsafe for unconfirmed or malicious txs
+    uint32 confirmedKredits = contributionContract.totalKreditsEarnedByContributor(id, true);
+    uint32 amountWithdrawable = confirmedKredits - c.kreditsWithdrawn;
+    require (amountWithdrawable > 0, "No kredits available");
+
+    c.kreditsWithdrawn += amountWithdrawable;
+    tokenContract.mintFor(msg.sender, amountWithdrawable);
+  }
 }

contracts/Token.sol

@@ -7,17 +7,15 @@ interface ContributorInterface {
   function getContributorAddressById(uint32 contributorId) external view returns (address);
   function getContributorIdByAddress(address contributorAccount) external view returns (uint32);
   function addressIsCore(address sender) external view returns (bool);
-  // TODO Maybe use for validation
-  // function exists(uint32 contributorId) public view returns (bool);
 }
 
 contract Token is Initializable, ERC20Upgradeable {
   ContributorInterface public contributorContract;
   using SafeMathUpgradeable for uint256;
 
-  address public contributionContract;
+  address public contributorContractAddress;
 
-  event LogMint(address indexed recipient, uint256 amount, uint32 contributionId);
+  event KreditsMinted(address indexed recipient, uint256 amount);
 
   function initialize() public virtual initializer {
     __ERC20_init("Kredits", "KS");
@@ -27,21 +25,17 @@ contract Token is Initializable, ERC20Upgradeable {
     return 0;
   }
 
-  function setContributionContract(address contribution) public {
-    require(address(contributionContract) == address(0) || contributorContract.addressIsCore(msg.sender), "Core only");
-    contributionContract = contribution;
-  }
   function setContributorContract(address contributor) public {
     require(address(contributorContract) == address(0) || contributorContract.addressIsCore(msg.sender), "Core only");
     contributorContract = ContributorInterface(contributor);
+    contributorContractAddress = contributor;
   }
 
-  function mintFor(address contributorAccount, uint256 amount, uint32 contributionId) public {
+  function mintFor(address contributorAccount, uint256 amount) public {
-    require(contributionContract == msg.sender, "Only Contribution");
+    require(contributorContractAddress == msg.sender, "Only Contributor");
     require(amount > 0, "INVALID_AMOUNT");
 
     _mint(contributorAccount, amount);
-    emit LogMint(contributorAccount, amount, contributionId);
+    emit KreditsMinted(contributorAccount, amount);
   }
-
 }

hardhat.config.js

@@ -1,6 +1,7 @@
 require("@nomiclabs/hardhat-waffle");
 require("hardhat-deploy");
 require("hardhat-deploy-ethers");
+require("@nomicfoundation/hardhat-chai-matchers");
 require("@openzeppelin/hardhat-upgrades");
 const Kredits = require("./lib/kredits");
 

lib/abis/Token.json

@@ -1 +1 @@
-[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint32","name":"contributionId","type":"uint32"}],"name":"LogMint","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contributionContract","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contributorContract","outputs":[{"internalType":"contract ContributorInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"contributorAccount","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"contributionId","type":"uint32"}],"name":"mintFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"contribution","type":"address"}],"name":"setContributionContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"contributor","type":"address"}],"name":"setContributorContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
+[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"KreditsMinted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contributorContract","outputs":[{"internalType":"contract ContributorInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contributorContractAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"contributorAccount","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mintFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"contributor","type":"address"}],"name":"setContributorContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

lib/addresses.json

@@ -1,8 +1,8 @@
 {
   "1337": {
-    "Contributor": "0x9fE46736679d2D9a65F0992F2272dE9f3c7fa6e0",
+    "Contributor": "0xCc66f9A3cA2670972938FAD91d0865c4a62DFB25",
-    "Contribution": "0xDc64a140Aa3E981100a9becA4E685f962f0cF6C9",
+    "Contribution": "0x8999CaBc43E28202c5A2257f2a95A45b1F8A62BD",
-    "Token": "0x0165878A594ca255338adfa4d48449f69242Eb8F",
+    "Token": "0xe082678eCF749982e33Ea6839852a8cd989aEDE2",
-    "Reimbursement": "0x2279B7A0a67DB372996a5FaB50D91eAA73d2eBe6"
+    "Reimbursement": "0x984f797d26d3da2E9b9f8Ae4eeFEACC60fCAA90C"
   }
 }

lib/contracts/contribution.js

@@ -58,7 +58,7 @@ class Contribution extends Record {
           ipfsHashAttr.hashSize,
         ];
 
-        return this.contract.add(...contribution, callOptions);
+        return this.contract.add(...contribution, 0, false, callOptions);
       });
   }
 

package.json

@@ -39,11 +39,13 @@
   },
   "homepage": "https://github.com/67P/kredits-contracts#readme",
   "devDependencies": {
+    "@nomicfoundation/hardhat-chai-matchers": "^1.0.3",
     "@nomiclabs/hardhat-ethers": "^2.0.2",
     "@nomiclabs/hardhat-waffle": "^2.0.1",
     "@openzeppelin/contracts-upgradeable": "^4.3.2",
     "@openzeppelin/hardhat-upgrades": "^1.10.0",
     "async-each-series": "^1.1.0",
+    "chai": "^4.3.6",
     "cli-table": "^0.3.1",
     "colors": "^1.0.3",
     "eslint": "^8.14.0",
@@ -57,6 +59,7 @@
     "hardhat-deploy": "^0.11.4",
     "hardhat-deploy-ethers": "^0.3.0-beta.10",
     "homedir": "^0.6.0",
+    "mocha": "^10.0.0",
     "promptly": "^3.0.3",
     "solhint": "^3.3.7",
     "truffle-hdwallet-provider": "^1.0.17",

scripts/create-proxy.js

@@ -1,4 +1,6 @@
-const { ethers, upgrades } = require("hardhat"); const path = require("path"); const fileInject = require("./helpers/file_inject.js");
+const { ethers, upgrades } = require("hardhat");
+const path = require("path");
+const fileInject = require("./helpers/file_inject.js");
 
 function handleError(error) {
   console.error(error.message);
@@ -55,16 +57,6 @@ async function main() {
       return res.wait();
     }).catch(handleError);
 
-
-  console.log('Calling Contribution#setTokenContract')
-  await contracts.Contribution.functions
-    .setTokenContract(contracts.Token.address)
-    .then(res => {
-      console.log(`...transaction published: ${res.hash}`);
-      return res.wait();
-    }).catch(handleError);
-
-
   console.log('Calling Contribution#setContributorContract')
   await contracts.Contribution.functions
     .setContributorContract(contracts.Contributor.address)
@@ -73,14 +65,6 @@ async function main() {
       return res.wait();
     }).catch(handleError);
 
-  console.log('Calling Token#setContributionContract')
-  await contracts.Token.functions
-    .setContributionContract(contracts.Contribution.address)
-    .then(res => {
-      console.log(`...transaction published: ${res.hash}`);
-      return res.wait();
-    }).catch(handleError);
-
   console.log('Calling Token#setContributorContract')
   await contracts.Token.functions
     .setContributorContract(contracts.Contributor.address)

scripts/export/contributions.js

@@ -0,0 +1,42 @@
+const Kredits = require('../../lib/kredits');
+
+async function main() {
+  kredits = new Kredits(hre.ethers.provider, hre.ethers.provider.getSigner())
+  await kredits.init();
+
+  console.log(`Using Contribution at: ${kredits.Contribution.contract.address}`);
+
+  const count = await kredits.Contribution.count;
+  const currentBlockHeight = await hre.ethers.provider.getBlockNumber();
+
+  const backup = {};
+  const promises = [];
+  for (let i = 1; i <= count; i++) {
+    promises.push(new Promise((resolve, reject) => {
+      setTimeout(async () => {
+        console.log(`Loading contribution #${i}`);
+        await kredits.Contribution.contract.getContribution(i).then(contractData => {
+          backup[i] = {
+            amount: contractData.amount,
+            contributorId: contractData.contributorId,
+            hashDigest: contractData.hashDigest,
+            hashFunction: contractData.hashFunction,
+            hashSize: contractData.hashSize,
+            confirmedAtBlock: contractData.confirmedAtBlock,
+            confirmed: contractData.confirmedAtBlock <= currentBlockHeight,
+            vetoed: contractData.vetoed,
+            id: contractData.id,
+          }
+          resolve();
+        });
+      }, 100 * i);
+    }));
+  }
+
+  await Promise.all(promises).then(() => {
+    fs.writeFileSync("./data/contributions.json", JSON.stringify(backup, null, 2));
+    console.log("Exported");
+  });
+}
+
+main();

scripts/export/contributors.js

@@ -0,0 +1,38 @@
+const fs = require('fs');
+const Kredits = require('../../lib/kredits');
+
+async function main() {
+  kredits = new Kredits(hre.ethers.provider, hre.ethers.provider.getSigner())
+  await kredits.init();
+
+  console.log(`Using Contributor at: ${kredits.Contributor.contract.address}`);
+
+  const count = await kredits.Contributor.count;
+
+  const backup = {};
+  const promises = [];
+  for (let i = 1; i <= count; i++) {
+    promises.push(new Promise((resolve, reject) => {
+      setTimeout(async () => {
+        console.log(`Loading contributor #${i}`);
+        await kredits.Contributor.contract.getContributorById(i).then(contractData => {
+          backup[i] = {
+            account: contractData.account,
+            hashDigest: contractData.hashDigest,
+            hashFunction: contractData.hashFunction,
+            hashSize: contractData.hashSize,
+            id: contractData.id,
+          }
+          resolve();
+        });
+      }, 100 * i);
+    }));
+  }
+
+  await Promise.all(promises).then(() => {
+    fs.writeFileSync("./data/contributors.json", JSON.stringify(backup, null, 2));
+    console.log("Exported");
+  });
+}
+
+main();

scripts/import/contributions.js

@@ -0,0 +1,39 @@
+const fs = require('fs');
+const Kredits = require('../../lib/kredits');
+
+async function main() {
+  kredits = new Kredits(hre.ethers.provider, hre.ethers.provider.getSigner())
+  await kredits.init();
+
+  console.log(`Using Contribution at: ${kredits.Contribution.contract.address}`);
+
+  try {
+    const data = fs.readFileSync("./data/contributions.json");
+    const contributions = JSON.parse(data);
+    const ids = Object.keys(contributions)
+                      .map(k => parseInt(k))
+                      .sort(function(a, b){return a-b});
+
+    const currentBlockHeight = await kredits.provider.getBlockNumber();
+    const confirmationPeriod = 40320 // blocks
+    const unconfirmedHeight = currentBlockHeight + confirmationPeriod;
+
+    for (const contributionId of ids) {
+      const c = contributions[contributionId.toString()];
+
+      const confirmedAtBlock = c.confirmed ? currentBlockHeight : unconfirmedHeight;
+
+      const result = await kredits.Contribution.contract.add(
+        c.amount, c.contributorId,
+        c.hashDigest, c.hashFunction, c.hashSize,
+        confirmedAtBlock, c.vetoed
+      );
+      // await result.wait();
+      console.log(`Added contribution #${contributionId}: ${result.hash}`);
+    };
+  } catch(e) {
+    console.log(e);
+  }
+}
+
+main();

scripts/import/contributors.js

@@ -0,0 +1,33 @@
+const fs = require('fs');
+const Kredits = require('../../lib/kredits');
+
+async function main() {
+  kredits = new Kredits(hre.ethers.provider, hre.ethers.provider.getSigner())
+  await kredits.init();
+
+  console.log(`Using Contributor at: ${kredits.Contributor.contract.address}`);
+
+  try {
+    const data = fs.readFileSync("./data/contributors.json");
+    const contributors = JSON.parse(data);
+    const ids = Object.keys(contributors)
+                      .map(k => parseInt(k))
+                      .sort(function(a, b){return a-b});
+
+    for (const contributorId of ids) {
+      const contributor = contributors[contributorId.toString()];
+      const result = await kredits.Contributor.contract.addContributor(
+        contributor.account,
+        contributor.hashDigest,
+        contributor.hashFunction,
+        contributor.hashSize,
+      );
+      // await result.wait();
+      console.log(`Added contributor #${contributorId}: ${result.hash}`);
+    };
+  } catch(e) {
+    console.log(e);
+  }
+}
+
+main();

scripts/list-contributions.js

@@ -12,7 +12,7 @@ async function main() {
   console.log(`Using Contribution at: ${kredits.Contribution.contract.address}`);
 
   const table = new Table({
-    head: ['ID', 'Contributor ID', 'Description', 'Amount', 'Confirmed?', 'Vetoed?', 'Claimed?', 'IPFS']
+    head: ['ID', 'Contributor ID', 'Description', 'Amount', 'Confirmed?', 'Vetoed?', 'IPFS']
   })
 
   try {
@@ -31,7 +31,6 @@ async function main() {
         c.amount.toString(),
         `${confirmed} (${c.confirmedAtBlock})`,
         c.vetoed,
-        c.claimed,
         c.ipfsHash
       ])
     });

test/contracts/Contribution.js

@@ -0,0 +1,157 @@
+const { expect } = require("chai");
+const { ethers, upgrades } = require("hardhat");
+const { anyValue } = require("@nomicfoundation/hardhat-chai-matchers/withArgs");
+let owner, addr1, addr2, addr3, addr4, addr5, addr6, addr7;
+let Contribution, Contributor;
+
+describe("Contribution contract", async function () {
+  before(async function () {
+    [owner, addr1, addr2, addr3, addr4, addr5, addr6, addr7] = await ethers.getSigners();
+    let accounts = [owner, addr1, addr2, addr3, addr4, addr5, addr6, addr7];
+    const contributorFactory = await ethers.getContractFactory("Contributor");
+    Contributor = await upgrades.deployProxy(contributorFactory);
+    for (const account of accounts) {
+      await Contributor.addContributor(account.address, "0x99b8afd7b266e19990924a8be9099e81054b70c36b20937228a77a5cf75723b8", 18, 32);
+    }
+  });
+
+  describe("initialize()", function () {
+    before(async function () {
+      // const [owner] = await ethers.getSigners();
+      const contributionFactory = await ethers.getContractFactory("Contribution");
+      Contribution = await upgrades.deployProxy(contributionFactory, [40321]);
+    });
+
+    it("sets the veto confirmation period", async function () {
+      expect(await Contribution.blocksToWait()).to.equal(40321);
+    });
+
+    it("sets the data migration flag", async function () {
+      expect(await Contribution.migrationDone()).to.be.false;
+    });
+
+    it("sets the deployer address", async function () {
+      expect(await Contribution.deployer()).to.equal(owner.address);
+      expect(await Contribution.deployer()).to.not.equal(addr1.address);
+    });
+  });
+
+  describe("finishMigration()", function () {
+    before(async function () {
+      const contributionFactory = await ethers.getContractFactory("Contribution");
+      Contribution = await upgrades.deployProxy(contributionFactory, [40321]);
+      await Contribution.setContributorContract(Contributor.address).then(res => res.wait())
+    });
+
+    it("does not allow random accounts to mark the migration as finished", async function () {
+      await expect(Contribution.connect(addr1).finishMigration()).to.be.revertedWith("Deployer only");
+      expect(await Contribution.migrationDone()).to.be.false;
+    });
+
+    it("allows the deployer to mark the migration as finished", async function () {
+      await Contribution.finishMigration();
+      expect(await Contribution.migrationDone()).to.equal(true);
+    });
+  });
+
+  describe("add()", function () {
+    before(async function () {
+      const contributionFactory = await ethers.getContractFactory("Contribution");
+      Contribution = await upgrades.deployProxy(contributionFactory, [40321]);
+      await Contribution.setContributorContract(Contributor.address).then(res => res.wait())
+      await Contribution.finishMigration();
+    });
+
+    it("does not allow non-contributors to add a contribution", async function () {
+      await expect(Contribution.connect(addr7).add(
+        500, 1,
+        "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 0, false
+      )).to.be.revertedWith("requires kredits or core status");
+      expect(await Contribution.contributionsCount()).to.equal(0);
+    });
+
+    it("does not allow special arguments outside of a migration", async function () {
+      await expect(Contribution.connect(addr7).add(
+        500, 1,
+        "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 23000, true
+      )).to.be.revertedWith("extra arguments during migration only");
+      expect(await Contribution.contributionsCount()).to.equal(0);
+    });
+
+    it("allows core contributors to add a contribution", async function () {
+      await Contribution.connect(addr2).add(
+        2001, 1,
+        "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 0, false
+      );
+      expect(await Contribution.contributionsCount()).to.equal(1);
+    });
+
+    it("allows contributors to add a contribution", async function () {
+      // Issue some kredits for new contributor #8 (addr7)
+      await Contribution.connect(addr1).add(
+        5000, 8,
+        "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 0, false
+      );
+      await Contribution.connect(addr7).add(
+        1500, 1,
+        "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 0, false
+      );
+      expect(await Contribution.contributionsCount()).to.equal(3);
+    });
+
+    it("sets confirmedAtBlock to current block plus blocksToWait", async function () {
+      await Contribution.connect(addr1).add(
+        500, 3,
+        "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 0, false
+      );
+      expect(await Contribution.contributionsCount()).to.equal(4);
+      const c = await Contribution.getContribution(4);
+      const currentBlockNumber = await kredits.provider.getBlockNumber();
+      expect(c['confirmedAtBlock']).to.equal(currentBlockNumber + 1 + 40321);
+    });
+
+    it("emits a ContributionAdded event", async function () {
+      await expect(Contribution.connect(addr1).add(
+        2001, 1,
+        "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 0, false
+      )).to.emit(Contribution, "ContributionAdded").withArgs(anyValue, 1, 2001);
+    });
+
+    describe("with extra arguments during migration", async function () {
+      before(async function () {
+        const contributionFactory = await ethers.getContractFactory("Contribution");
+        Contribution = await upgrades.deployProxy(contributionFactory, [40321]);
+        await Contribution.setContributorContract(Contributor.address);
+      });
+
+      it("allows to add a contribution with custom confirmedAtBlock", async function () {
+        await Contribution.connect(addr2).add(
+          2001, 1,
+          "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+          18, 32, 23000, false
+        );
+        expect(await Contribution.contributionsCount()).to.equal(1);
+        const c = await Contribution.getContribution(1);
+        expect(c['confirmedAtBlock'].toNumber()).to.equal(23000);
+      });
+
+      it("allows to add a vetoed contribution", async function () {
+        await Contribution.connect(addr2).add(
+          2001, 1,
+          "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+          18, 32, 23000, true
+        );
+        expect(await Contribution.contributionsCount()).to.equal(2);
+        const c = await Contribution.getContribution(2);
+        expect(c['vetoed']).to.be.true;
+      });
+    });
+  });
+});

test/contracts/Contributor.js

@@ -0,0 +1,106 @@
+const { expect } = require("chai");
+const { ethers, upgrades } = require("hardhat");
+let owner, addr1, addr2, addr3, addr4, addr5, addr6, addr7;
+let Contribution, Contributor, Token;
+
+describe("Contributor contract", async function () {
+  before(async function () {
+    [owner, addr1, addr2, addr3, addr4, addr5, addr6, addr7] = await ethers.getSigners();
+
+    const contributorFactory = await ethers.getContractFactory("Contributor");
+    Contributor = await upgrades.deployProxy(contributorFactory);
+    const contributionFactory = await ethers.getContractFactory("Contribution");
+    Contribution = await upgrades.deployProxy(contributionFactory, [40321]);
+    const tokenFactory = await ethers.getContractFactory("Token");
+    Token = await upgrades.deployProxy(tokenFactory);
+
+    await Contributor.setTokenContract(Token.address);
+    await Contributor.setContributionContract(Contribution.address);
+    await Contribution.setContributorContract(Contributor.address);
+    await Token.setContributorContract(Contributor.address);
+
+    let accounts = [owner, addr1, addr2, addr3, addr4, addr5, addr6, addr7];
+    for (const account of accounts) {
+      await Contributor.addContributor(account.address, "0x99b8afd7b266e19990924a8be9099e81054b70c36b20937228a77a5cf75723b8", 18, 32);
+    }
+  });
+
+  describe("initialize()", function () {
+    it("sets the deployer address", async function () {
+      expect(await Contributor.deployer()).to.equal(owner.address);
+      expect(await Contributor.deployer()).to.not.equal(addr1.address);
+    });
+  });
+
+  describe("add()", function () {
+    it("does not allow random accounts to create a contributor profile", async function () {
+      await expect(Contributor.connect(addr7).addContributor(
+        "0x608FD4b95116Ea616990Aaeb1d4f1ce07612f261",
+        "0x1d9de6de5c72eedca6d7a5e8a9159e2f5fe676506aece3000acefcc821723429",
+        18, 32
+      )).to.be.revertedWith("Core only");
+      expect(await Contributor.contributorsCount()).to.equal(8);
+    });
+
+    it("allows core contributors to create a contributor profile", async function () {
+      await Contributor.connect(addr1).addContributor(
+        "0x608FD4b95116Ea616990Aaeb1d4f1ce07612f261",
+        "0x1d9de6de5c72eedca6d7a5e8a9159e2f5fe676506aece3000acefcc821723429",
+        18, 32
+      );
+      expect(await Contributor.contributorsCount()).to.equal(9);
+      const c = await Contributor.getContributorById(9);
+      expect(c['account']).to.equal("0x608FD4b95116Ea616990Aaeb1d4f1ce07612f261");
+      expect(c['kreditsWithdrawn']).to.equal(0);
+    });
+
+    it("does not allow to create accounts with an existing address", async function () {
+      await expect(Contributor.connect(addr1).addContributor(
+        "0x608FD4b95116Ea616990Aaeb1d4f1ce07612f261",
+        "0x1d9de6de5c72eedca6d7a5e8a9159e2f5fe676506aece3000acefcc821723429",
+        18, 32
+      )).to.be.revertedWith("Address already in use");
+      expect(await Contributor.contributorsCount()).to.equal(9);
+    });
+
+    it("emits a ContributorAdded event", async function () {
+      await expect(Contributor.connect(addr1).addContributor(
+        "0x765E88b4F9a59C3a3b300C6eFF9E6E9fDDf9FbD9",
+        "0xcfbeeadc244dfdc55bbad50d431871439df067970db84c73023956c96a6f5df2",
+        18, 32
+      )).to.emit(Contributor, "ContributorAdded").withArgs(10, "0x765E88b4F9a59C3a3b300C6eFF9E6E9fDDf9FbD9");
+    });
+  });
+
+  describe("withdraw()", function () {
+    before(async function () {
+      // Add some pre-confirmed contributions (confirmedAtBlock 1)
+      await Contribution.add(
+        1500, 2, "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 1, false
+      );
+      await Contribution.add(
+        5000, 2, "0xe794f010e617449719c64076546254129f63a6d16cf200031afa646aeb35777f",
+        18, 32, 1, false
+      );
+      await Contribution.finishMigration();
+    });
+
+    it("requires the transaction sender to be a contributor", async function () {
+      await expect(Contributor.withdraw()).to.be.revertedWith("Contributors only");
+    });
+
+    it("executes a withdrawal of all available ERC20 kredits", async function () {
+      let c = await Contributor.getContributorById(2);
+      expect(c['balance']).to.equal(0);
+      await Contributor.connect(addr1).withdraw();
+      c = await Contributor.getContributorById(2);
+      expect(c['balance']).to.equal(6500);
+      expect(c['kreditsWithdrawn']).to.equal(6500);
+    });
+
+    it("requires the withdrawable amount to be larger than 0", async function () {
+      await expect(Contributor.connect(addr1).withdraw()).to.be.revertedWith("No kredits available");
+    });
+  });
+});