Ribbon fuse pool #1

chudnov · 2022-04-01T21:31:37Z

Tests can be found in governance repo pr. It includes same RibbonVaultAssetOracle.sol and simplified versions of CERC20.sol and RewardsDistributorDelegate.sol

chudnov · 2022-04-01T21:32:52Z

contracts/RibbonVaultAssetOracle.sol

+import "./interfaces/ILiquidityGauge.sol";
+import "./interfaces/IRibbonVault.sol";
+import {DSMath} from "./libraries/DSMath.sol";
+


tests for this

chudnov · 2022-04-05T22:46:30Z

contracts/RewardsDistributorDelegate.sol

+     * @param cToken The market whose COMP speed to update
+     */
+    function _updateSpeedWithNewEpoch(CToken cToken) public {
+        require(block.timestamp.sub(startTime) >= WEEK, "Must be at least week since latest epoch");


potential issues:

1: if _updateSpeedWithNewEpoch not called from cron job w fast enough cadence it could be spreading rewards for longer duration than the speed duration was set for (longer than a week). But should not be a problem as long as we continue minting each week so even if we call late they can claim from balance of subsequent (essentially kick can down road indefinitely)

2: if AVG_BLOCKS_PER_WEEK is off, we could be giving out more rewards than speed duration set for (ex: we assume AVG is x but we end up having 1.0025x blocks so we spread out same rewards for more blocks. But should average out and again should not be a problem as long as we continue minting each week so even if we call late they can claim from balance of subsequent (essentially kick can down road indefinitely).

chudnov · 2022-04-05T22:47:33Z

contracts/RewardsDistributorDelegate.sol

+    /**
+     * @notice Set new borrow / supply speed
+     * @param cToken The market whose COMP speed to update
+     */


_updateSpeedWithNewEpoch needs to be called from cron job weekly

kenchangh · 2022-04-06T02:26:44Z

contracts/CErc20.sol

+    // Minter contract for rbn gauge emissions
+    RibbonMinter public constant RBN_MINTER = RibbonMinter(0x5B0655F938A72052c46d2e94D206ccB6FF625A3A);
+    // RBN token
+    IERC20Upgradeable public constant RBN = IERC20Upgradeable(0x6123b0049f904d730db3c36a31167d9d4121fa6b);


We can use IERC20 because we're not touching any of the upgradeable functionality

kenchangh · 2022-04-06T02:47:25Z

contracts/CErc20.sol

+        // Underlying is the gauge token like rETH-THETA-gauge
+        RBN_MINTER.mint(underlying)
+
+        uint256 toDistribute = RBN.balanceOf(address(this));


We can add these lines to return early

if (toDistribute == 0) { return; }

kenchangh · 2022-04-06T02:53:10Z

contracts/RewardsDistributorDelegate.sol

@@ -106,7 +140,7 @@ contract RewardsDistributorDelegate is RewardsDistributorDelegateStorageV1, Expo
        // Make sure distributor is added
        bool distributorAdded = false;
        address[] memory distributors = comptroller.getRewardsDistributors();
-        for (uint256 i = 0; i < distributors.length; i++) if (distributors[i] == address(this)) distributorAdded = true; 
+        for (uint256 i = 0; i < distributors.length; i++) if (distributors[i] == address(this)) distributorAdded = true;


Gas optimization for loop:

uint256 distributorsLen = distributors.length; for (uint256 i = 0; i < distributorsLen; ++i)

is distributors.length really calculated multiple times? this code was not changed its from original comp

kenchangh · 2022-04-06T02:53:38Z

contracts/RewardsDistributorDelegate.sol

+     * @notice Set borrower PCT
+     */
+    function _setBorrowerPCT(uint256 _borrowerPCT) public {
+        require(msg.sender == admin, "only admin can set comp speed");


nit only admin can set borrower percent

kenchangh · 2022-04-06T03:07:14Z

contracts/RewardsDistributorDelegate.sol

+     * @notice Set new borrow / supply speed
+     * @param cToken The market whose COMP speed to update
+     */
+    function _updateSpeedWithNewEpoch(CToken cToken) public {


We can rename this to be without underscore since it's public updateSpeedWithNewEpoch. We can also change it to external

function updateSpeedWithNewEpoch(CToken cToken) external {

kenchangh · 2022-04-06T03:08:32Z

contracts/RewardsDistributorDelegate.sol

+     * @notice Burn
+     * @param Takes in RBN tokens
+     */
+    function burn(uint256 amount) public {


Can change this to external

sriyantra · 2022-04-10T21:19:58Z

contracts/CErc20.sol

@@ -212,6 +216,10 @@ contract CErc20 is CToken, CErc20Interface {
        // Underlying is the gauge token like rETH-THETA-gauge
        RBN_MINTER.mint(underlying)

+        uint256 toDistribute = RBN.balanceOf(address(this));
+
+        RBN.approve(rewardsDistributor, toDistribute)


you don't want to do an infinite approval once, like in becomeImplementationData?

kenchangh · 2022-04-11T11:16:17Z

contracts/RibbonVaultAssetOracle.sol

+
+    IRibbonVault vault = IRibbonVault(ILiquidityGauge(underlying).lp_token());
+    uint256 rVaultDecimals = vault.decimals();
+    uint256 rVaultToAssetExchangeRate = vault.pricePerShare(); // (ex: rETH-THETA -> ETH, rBTC-THETA -> BTC)


Do we not have to lookup the Uniswap v3 pool for this price?

chudnov · 2022-04-16T23:03:42Z

contracts/CErc20.sol

@@ -1,18 +1,35 @@
 pragma solidity ^0.5.16;



tests for this

chudnov · 2022-04-16T23:03:51Z

contracts/RewardsDistributorDelegate.sol


 /**
 * @title RewardsDistributorDelegate (COMP distribution logic extracted from `Comptroller`)
 * @author Compound
 */
 contract RewardsDistributorDelegate is RewardsDistributorDelegateStorageV1, ExponentialNoError {
+    using SafeMath for uint;
+
    /// @dev Notice that this contract is a RewardsDistributor
    bool public constant isRewardsDistributor = true;



tests for this

add claim reward functionality

23922b7

chudnov changed the base branch from master to fuse-final April 1, 2022 21:31

chudnov commented Apr 1, 2022

View reviewed changes

Your Name added 2 commits April 1, 2022 14:39

upper

3c5bfe4

add epoch based reward

0b20ee0

chudnov commented Apr 5, 2022

View reviewed changes

kenchangh reviewed Apr 6, 2022

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address comments

89fe5c3

sriyantra reviewed Apr 10, 2022

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kenchangh reviewed Apr 11, 2022

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Your Name added 7 commits April 16, 2022 14:31

change revert message

c1ed18e

remove bad require

05e9e12

keep

3cede01

swap borrower with supply speeds

cd396bc

allow borrow pct to be 0

99db425

add semicolon

89b6d6f

add semicolon

688aac2

chudnov commented Apr 16, 2022

View reviewed changes

contracts/CErc20.sol

@@ -1,18 +1,35 @@

pragma solidity ^0.5.16;

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chudnov Apr 16, 2022

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tests for this

chudnov commented Apr 16, 2022

View reviewed changes

Your Name added 5 commits April 17, 2022 16:16

use older version of ierc20

4684929

fix undeclared identifier

b753fc8

fix undeclared identifier

3fe0665

fix compile errors, make avgBlocksPerWeek adjustable

f45c116

change error for _setAvgBlocksPerWeek

31b9857

Your Name added 2 commits April 17, 2022 16:50

change from undeclared identifier

a9926a6

fix last compile error

378a91f

kenchangh approved these changes Apr 18, 2022

View reviewed changes

Your Name added 6 commits April 17, 2022 22:25

differentiate totalMint

55b258b

supplier

5645f70

add events and recoverAsset

7f63e3d

change to _recoverAsset

3ddbab1

add reward stables

a0640a2

address audit

50beda2

chudnov changed the base branch from fuse-final to fuse-reactive-audit May 16, 2022 22:18

chudnov changed the base branch from fuse-reactive-audit to fuse-final May 16, 2022 22:18

chudnov changed the base branch from fuse-final to fuse-reactive-audit May 16, 2022 22:18

chudnov changed the base branch from fuse-reactive-audit to fuse-final May 16, 2022 22:19

chudnov changed the base branch from fuse-final to fuse-reactive-audit May 16, 2022 22:36

chudnov changed the base branch from fuse-reactive-audit to fuse-final May 16, 2022 22:43

mul with 10 ** 8

eedf42c

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Ribbon fuse pool #1

Ribbon fuse pool #1

chudnov commented Apr 1, 2022 •

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Ribbon fuse pool #1

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