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https://github.com/Instadapp/dsa-resolvers-deprecated.git
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Merge pull request #2 from liquity/add-liquity-position-hints
add hint helper functions to Liquity resolver
This commit is contained in:
Edward Mulraney
GitHub
commit
7508655435
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@ -2,126 +2,198 @@ pragma solidity ^0.6.0;
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pragma experimental ABIEncoderV2;
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interface TroveManagerLike {
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function getBorrowingRateWithDecay() external view returns (uint);
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function getTCR(uint _price) external view returns (uint);
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function getCurrentICR(address _borrower, uint _price) external view returns (uint);
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function checkRecoveryMode(uint _price) external view returns (bool);
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function getEntireDebtAndColl(address _borrower) external view returns (
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uint debt,
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uint coll,
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uint pendingLUSDDebtReward,
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uint pendingETHReward
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);
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function getBorrowingRateWithDecay() external view returns (uint);
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function getTCR(uint _price) external view returns (uint);
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function getCurrentICR(address _borrower, uint _price) external view returns (uint);
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function checkRecoveryMode(uint _price) external view returns (bool);
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function getEntireDebtAndColl(address _borrower) external view returns (
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uint debt,
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uint coll,
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uint pendingLUSDDebtReward,
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uint pendingETHReward
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);
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}
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interface StabilityPoolLike {
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function getCompoundedLUSDDeposit(address _depositor) external view returns (uint);
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function getDepositorETHGain(address _depositor) external view returns (uint);
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function getDepositorLQTYGain(address _depositor) external view returns (uint);
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function getCompoundedLUSDDeposit(address _depositor) external view returns (uint);
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function getDepositorETHGain(address _depositor) external view returns (uint);
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function getDepositorLQTYGain(address _depositor) external view returns (uint);
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}
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interface StakingLike {
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function stakes(address owner) external view returns (uint);
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function getPendingETHGain(address _user) external view returns (uint);
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function getPendingLUSDGain(address _user) external view returns (uint);
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function stakes(address owner) external view returns (uint);
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function getPendingETHGain(address _user) external view returns (uint);
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function getPendingLUSDGain(address _user) external view returns (uint);
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}
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interface PoolLike {
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function getETH() external view returns (uint);
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function getETH() external view returns (uint);
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}
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contract DSMath {
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function add(uint x, uint y) internal pure returns (uint z) {
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require((z = x + y) >= x, "math-not-safe");
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}
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interface HintHelpersLike {
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function computeNominalCR(uint _coll, uint _debt) external pure returns (uint);
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function computeCR(uint _coll, uint _debt, uint _price) external pure returns (uint);
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function getApproxHint(uint _CR, uint _numTrials, uint _inputRandomSeed) external view returns (
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address hintAddress,
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uint diff,
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uint latestRandomSeed
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);
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function getRedemptionHints(uint _LUSDamount, uint _price, uint _maxIterations) external view returns (
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address firstHint,
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uint partialRedemptionHintNICR,
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uint truncatedLUSDamount
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);
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}
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contract Helpers is DSMath {
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TroveManagerLike internal constant troveManager =
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TroveManagerLike(0xA39739EF8b0231DbFA0DcdA07d7e29faAbCf4bb2);
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interface SortedTrovesLike {
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function getSize() external view returns (uint256);
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function findInsertPosition(uint256 _ICR, address _prevId, address _nextId) external view returns (address, address);
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}
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StabilityPoolLike internal constant stabilityPool =
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StabilityPoolLike(0x66017D22b0f8556afDd19FC67041899Eb65a21bb);
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contract Math {
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/* DSMath add */
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function add(uint x, uint y) internal pure returns (uint z) {
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require((z = x + y) >= x, "math-not-safe");
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}
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/* DSMath mul */
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function mul(uint x, uint y) internal pure returns (uint z) {
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require(y == 0 || (z = x * y) / y == x, "math-not-safe");
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}
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StakingLike internal constant staking =
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StakingLike(0x4f9Fbb3f1E99B56e0Fe2892e623Ed36A76Fc605d);
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/* Uniswap V2 sqrt */
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function sqrt(uint y) internal pure returns (uint z) {
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if (y > 3) {
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z = y;
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uint x = y / 2 + 1;
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while (x < z) {
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z = x;
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x = (y / x + x) / 2;
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}
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} else if (y != 0) {
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z = 1;
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}
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}
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}
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PoolLike internal constant activePool =
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PoolLike(0xDf9Eb223bAFBE5c5271415C75aeCD68C21fE3D7F);
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PoolLike internal constant defaultPool =
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PoolLike(0x896a3F03176f05CFbb4f006BfCd8723F2B0D741C);
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contract Helpers is Math {
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TroveManagerLike internal constant troveManager =
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TroveManagerLike(0xA39739EF8b0231DbFA0DcdA07d7e29faAbCf4bb2);
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struct Trove {
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uint collateral;
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uint debt;
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uint icr;
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}
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StabilityPoolLike internal constant stabilityPool =
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StabilityPoolLike(0x66017D22b0f8556afDd19FC67041899Eb65a21bb);
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struct StabilityDeposit {
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uint deposit;
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uint ethGain;
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uint lqtyGain;
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}
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StakingLike internal constant staking =
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StakingLike(0x4f9Fbb3f1E99B56e0Fe2892e623Ed36A76Fc605d);
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struct Stake {
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uint amount;
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uint ethGain;
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uint lusdGain;
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}
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PoolLike internal constant activePool =
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PoolLike(0xDf9Eb223bAFBE5c5271415C75aeCD68C21fE3D7F);
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PoolLike internal constant defaultPool =
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PoolLike(0x896a3F03176f05CFbb4f006BfCd8723F2B0D741C);
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struct Position {
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Trove trove;
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StabilityDeposit stability;
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Stake stake;
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}
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HintHelpersLike internal constant hintHelpers =
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HintHelpersLike(0xE84251b93D9524E0d2e621Ba7dc7cb3579F997C0);
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SortedTrovesLike internal constant sortedTroves =
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SortedTrovesLike(0x8FdD3fbFEb32b28fb73555518f8b361bCeA741A6);
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struct Trove {
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uint collateral;
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uint debt;
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uint icr;
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}
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struct System {
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uint borrowFee;
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uint ethTvl;
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uint tcr;
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bool isInRecoveryMode;
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}
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struct StabilityDeposit {
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uint deposit;
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uint ethGain;
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uint lqtyGain;
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}
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struct Stake {
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uint amount;
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uint ethGain;
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uint lusdGain;
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}
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struct Position {
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Trove trove;
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StabilityDeposit stability;
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Stake stake;
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}
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struct System {
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uint borrowFee;
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uint ethTvl;
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uint tcr;
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bool isInRecoveryMode;
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}
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}
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contract Resolver is Helpers {
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function getTrove(address owner, uint oracleEthPrice) public view returns (Trove memory) {
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(uint debt, uint collateral, , ) = troveManager.getEntireDebtAndColl(owner);
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uint icr = troveManager.getCurrentICR(owner, oracleEthPrice);
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return Trove(collateral, debt, icr);
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}
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function getTrove(address owner, uint oracleEthPrice) public view returns (Trove memory) {
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(uint debt, uint collateral, , ) = troveManager.getEntireDebtAndColl(owner);
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uint icr = troveManager.getCurrentICR(owner, oracleEthPrice);
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return Trove(collateral, debt, icr);
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}
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function getStabilityDeposit(address owner) public view returns (StabilityDeposit memory) {
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uint deposit = stabilityPool.getCompoundedLUSDDeposit(owner);
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uint ethGain = stabilityPool.getDepositorETHGain(owner);
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uint lqtyGain = stabilityPool.getDepositorLQTYGain(owner);
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return StabilityDeposit(deposit, ethGain, lqtyGain);
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}
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function getStabilityDeposit(address owner) public view returns (StabilityDeposit memory) {
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uint deposit = stabilityPool.getCompoundedLUSDDeposit(owner);
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uint ethGain = stabilityPool.getDepositorETHGain(owner);
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uint lqtyGain = stabilityPool.getDepositorLQTYGain(owner);
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return StabilityDeposit(deposit, ethGain, lqtyGain);
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}
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function getStake(address owner) public view returns (Stake memory) {
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uint amount = staking.stakes(owner);
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uint ethGain = staking.getPendingETHGain(owner);
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uint lusdGain = staking.getPendingLUSDGain(owner);
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return Stake(amount, ethGain, lusdGain);
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}
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function getStake(address owner) public view returns (Stake memory) {
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uint amount = staking.stakes(owner);
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uint ethGain = staking.getPendingETHGain(owner);
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uint lusdGain = staking.getPendingLUSDGain(owner);
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return Stake(amount, ethGain, lusdGain);
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}
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function getPosition(address owner, uint oracleEthPrice) external view returns (Position memory) {
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Trove memory trove = getTrove(owner, oracleEthPrice);
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StabilityDeposit memory stability = getStabilityDeposit(owner);
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Stake memory stake = getStake(owner);
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return Position(trove, stability, stake);
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}
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function getPosition(address owner, uint oracleEthPrice) external view returns (Position memory) {
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Trove memory trove = getTrove(owner, oracleEthPrice);
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StabilityDeposit memory stability = getStabilityDeposit(owner);
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Stake memory stake = getStake(owner);
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return Position(trove, stability, stake);
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}
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function getSystemState(uint oracleEthPrice) external view returns (System memory) {
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uint borrowFee = troveManager.getBorrowingRateWithDecay();
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uint ethTvl = add(activePool.getETH(), defaultPool.getETH());
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uint tcr = troveManager.getTCR(oracleEthPrice);
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bool isInRecoveryMode = troveManager.checkRecoveryMode(oracleEthPrice);
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return System(borrowFee, ethTvl, tcr, isInRecoveryMode);
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}
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function getSystemState(uint oracleEthPrice) external view returns (System memory) {
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uint borrowFee = troveManager.getBorrowingRateWithDecay();
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uint ethTvl = add(activePool.getETH(), defaultPool.getETH());
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uint tcr = troveManager.getTCR(oracleEthPrice);
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bool isInRecoveryMode = troveManager.checkRecoveryMode(oracleEthPrice);
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return System(borrowFee, ethTvl, tcr, isInRecoveryMode);
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}
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function getTrovePositionHints(uint collateral, uint debt, uint searchIterations, uint randomSeed) external view returns (
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address upperHint,
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address lowerHint
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) {
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// See: https://github.com/liquity/dev#supplying-hints-to-trove-operations
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uint nominalCr = hintHelpers.computeNominalCR(collateral, debt);
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searchIterations = searchIterations == 0 ? mul(10, sqrt(sortedTroves.getSize())) : searchIterations;
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randomSeed = randomSeed == 0 ? block.number : randomSeed;
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(address hintAddress, ,) = hintHelpers.getApproxHint(nominalCr, searchIterations, randomSeed);
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return sortedTroves.findInsertPosition(nominalCr, hintAddress, hintAddress);
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}
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function getRedemptionPositionHints(uint amount, uint oracleEthPrice, uint searchIterations, uint randomSeed) external view returns (
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uint partialHintNicr,
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address firstHint,
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address upperHint,
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address lowerHint
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) {
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// See: https://github.com/liquity/dev#hints-for-redeemcollateral
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(firstHint, partialHintNicr, ) = hintHelpers.getRedemptionHints(amount, oracleEthPrice, 0);
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searchIterations = searchIterations == 0 ? mul(10, sqrt(sortedTroves.getSize())) : searchIterations;
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randomSeed = randomSeed == 0 ? block.number : randomSeed;
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(address hintAddress, ,) = hintHelpers.getApproxHint(partialHintNicr, searchIterations, randomSeed);
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(upperHint, lowerHint) = sortedTroves.findInsertPosition(partialHintNicr, hintAddress, hintAddress);
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}
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}
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contract InstaLiquityResolver is Resolver {
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string public constant name = "Liquity-Resolver-v1";
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string public constant name = "Liquity-Resolver-v1";
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}
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157
test/liquity.js
157
test/liquity.js
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@ -1,5 +1,6 @@
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const { expect } = require("chai");
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const hardhatConfig = require("../hardhat.config");
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const { BigNumber } = hre.ethers;
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// Deterministic block number to run these tests from on forked mainnet. If you change this, tests will break.
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@ -13,28 +14,37 @@ const PRICE_FEED_ADDRESS = "0x4c517D4e2C851CA76d7eC94B805269Df0f2201De";
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const PRICE_FEED_ABI = ["function fetchPrice() external returns (uint)"];
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/* Begin: Mock test data (based on specified BLOCK_NUMBER and JUSTIN_SUN_ADDRESS) */
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const expectedTrovePosition = [
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/* collateral */ BigNumber.from("582880000000000000000000"),
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/* debt */ BigNumber.from("372000200000000000000000000"),
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/* icr */ BigNumber.from("3859882210893925325"),
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];
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const expectedStabilityPosition = [
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/* deposit */ BigNumber.from("299979329615565997640451998"),
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/* ethGain */ BigNumber.from("8629038660000000000"),
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/* lqtyGain */ BigNumber.from("53244322633874479119945"),
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];
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const expectedStakePosition = [
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/* amount */ BigNumber.from("981562996504090969804965"),
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/* ethGain */ BigNumber.from("18910541408996344243"),
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/* lusdGain */ BigNumber.from("66201062534511228032281"),
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];
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const expectedSystemState = [
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/* borrowFee */ BigNumber.from("6900285109012952"),
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/* ethTvl */ BigNumber.from("852500462432421494350957"),
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/* tcr */ BigNumber.from("3250195441371082828"),
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/* isInRecoveryMode */ false,
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];
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const expectedTrovePosition = {
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collateral: BigNumber.from("582880000000000000000000"),
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debt: BigNumber.from("372000200000000000000000000"),
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icr: BigNumber.from("3859882210893925325"),
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};
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const expectedStabilityPosition = {
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deposit: BigNumber.from("299979329615565997640451998"),
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ethGain: BigNumber.from("8629038660000000000"),
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lqtyGain: BigNumber.from("53244322633874479119945"),
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};
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const expectedStakePosition = {
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amount: BigNumber.from("981562996504090969804965"),
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ethGain: BigNumber.from("18910541408996344243"),
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lusdGain: BigNumber.from("66201062534511228032281"),
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};
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const expectedSystemState = {
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borrowFee: BigNumber.from("6900285109012952"),
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ethTvl: BigNumber.from("852500462432421494350957"),
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tcr: BigNumber.from("3250195441371082828"),
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isInRecoveryMode: false,
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};
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const expectedTrovePositionHints = {
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upperHint: "0xbf9a4eCC4151f28C03100bA2C0555a3D3e439e69",
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lowerHint: "0xa4FC81A7AB93360543eb1e814D0127f466012CED",
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};
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const expectedRedemptionPositionHints = {
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partialRedemptionHintNicr: "69529933762909647",
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firstHint: "0xc16aDd8bA17ab81B27e930Da8a67848120565d8c",
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upperHint: "0x66882C005188F0F4d95825ED7A7F78ed3055f167",
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lowerHint: "0x0C22C11a8ed4C23ffD19629283548B1692b58e92",
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};
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/* End: Mock test data */
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describe("InstaLiquityResolver", () => {
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|
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@ -55,6 +65,7 @@ describe("InstaLiquityResolver", () => {
|
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);
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liquity = await liquityFactory.deploy();
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await liquity.deployed();
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});
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|
@ -69,7 +80,11 @@ describe("InstaLiquityResolver", () => {
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JUSTIN_SUN_ADDRESS,
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oracleEthPrice
|
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);
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expect(trovePosition).to.eql(expectedTrovePosition);
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expect(trovePosition.collateral).to.equal(
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expectedTrovePosition.collateral
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);
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expect(trovePosition.debt).to.equal(expectedTrovePosition.debt);
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expect(trovePosition.icr).to.equal(expectedTrovePosition.icr);
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});
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});
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|
|
@ -78,14 +93,24 @@ describe("InstaLiquityResolver", () => {
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const stabilityPosition = await liquity.getStabilityDeposit(
|
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JUSTIN_SUN_ADDRESS
|
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);
|
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expect(stabilityPosition).to.eql(expectedStabilityPosition);
|
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expect(stabilityPosition.deposit).to.equal(
|
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expectedStabilityPosition.deposit
|
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);
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expect(stabilityPosition.ethGain).to.equal(
|
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expectedStabilityPosition.ethGain
|
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);
|
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expect(stabilityPosition.lqtyGain).to.equal(
|
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expectedStabilityPosition.lqtyGain
|
||||
);
|
||||
});
|
||||
});
|
||||
|
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describe("getStake()", () => {
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it("returns a user's Stake position", async () => {
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const stakePosition = await liquity.getStake(JUSTIN_SUN_ADDRESS);
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expect(stakePosition).to.eql(expectedStakePosition);
|
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expect(stakePosition.amount).to.equal(expectedStakePosition.amount);
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expect(stakePosition.ethGain).to.equal(expectedStakePosition.ethGain);
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expect(stakePosition.lusdGain).to.equal(expectedStakePosition.lusdGain);
|
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});
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||||
});
|
||||
|
||||
|
|
@ -96,12 +121,30 @@ describe("InstaLiquityResolver", () => {
|
|||
JUSTIN_SUN_ADDRESS,
|
||||
oracleEthPrice
|
||||
);
|
||||
const expectedPosition = [
|
||||
expectedTrovePosition,
|
||||
expectedStabilityPosition,
|
||||
expectedStakePosition,
|
||||
];
|
||||
expect(position).to.eql(expectedPosition);
|
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const expectedPosition = {
|
||||
trove: expectedTrovePosition,
|
||||
stability: expectedStabilityPosition,
|
||||
stake: expectedStakePosition,
|
||||
};
|
||||
expect(position.trove.collateral).to.equal(
|
||||
expectedPosition.trove.collateral
|
||||
);
|
||||
expect(position.trove.debt).to.equal(expectedPosition.trove.debt);
|
||||
expect(position.trove.icr).to.equal(expectedPosition.trove.icr);
|
||||
|
||||
expect(position.stability.deposit).to.equal(
|
||||
expectedPosition.stability.deposit
|
||||
);
|
||||
expect(position.stability.ethGain).to.equal(
|
||||
expectedPosition.stability.ethGain
|
||||
);
|
||||
expect(position.stability.lqtyGain).to.equal(
|
||||
expectedPosition.stability.lqtyGain
|
||||
);
|
||||
|
||||
expect(position.stake.amount).to.equal(expectedPosition.stake.amount);
|
||||
expect(position.stake.ethGain).to.equal(expectedPosition.stake.ethGain);
|
||||
expect(position.stake.lusdGain).to.equal(expectedPosition.stake.lusdGain);
|
||||
});
|
||||
});
|
||||
|
||||
|
|
@ -109,7 +152,57 @@ describe("InstaLiquityResolver", () => {
|
|||
it("returns Liquity system state", async () => {
|
||||
const oracleEthPrice = await liquityPriceOracle.callStatic.fetchPrice();
|
||||
const systemState = await liquity.getSystemState(oracleEthPrice);
|
||||
expect(systemState).to.eql(expectedSystemState);
|
||||
expect(systemState.borrowFee).to.equal(expectedSystemState.borrowFee);
|
||||
expect(systemState.ethTvl).to.equal(expectedSystemState.ethTvl);
|
||||
expect(systemState.tcr).to.equal(expectedSystemState.tcr);
|
||||
expect(systemState.isInRecoveryMode).to.equal(
|
||||
expectedSystemState.isInRecoveryMode
|
||||
);
|
||||
});
|
||||
});
|
||||
|
||||
describe("getTrovePositionHints()", () => {
|
||||
it("returns the upper and lower address of Troves nearest to the given Trove", async () => {
|
||||
const collateral = hre.ethers.utils.parseEther("10");
|
||||
const debt = hre.ethers.utils.parseUnits("5000", 18); // 5,000 LUSD
|
||||
const searchIterations = 10;
|
||||
const randomSeed = 3;
|
||||
const [upperHint, lowerHint] = await liquity.getTrovePositionHints(
|
||||
collateral,
|
||||
debt,
|
||||
searchIterations,
|
||||
randomSeed
|
||||
);
|
||||
|
||||
expect(upperHint).eq(expectedTrovePositionHints.upperHint);
|
||||
expect(lowerHint).eq(expectedTrovePositionHints.lowerHint);
|
||||
});
|
||||
});
|
||||
|
||||
describe("getRedemptionPositionHints()", () => {
|
||||
it("returns the upper and lower address of the range of Troves to be redeemed against the given amount", async () => {
|
||||
const amount = hre.ethers.utils.parseUnits("10000", 18); // 10,000 LUSD
|
||||
const oracleEthPrice = await liquityPriceOracle.callStatic.fetchPrice();
|
||||
const searchIterations = 10;
|
||||
const randomSeed = 3;
|
||||
const [
|
||||
partialRedemptionHintNicr,
|
||||
firstHint,
|
||||
upperHint,
|
||||
lowerHint,
|
||||
] = await liquity.getRedemptionPositionHints(
|
||||
amount,
|
||||
oracleEthPrice,
|
||||
searchIterations,
|
||||
randomSeed
|
||||
);
|
||||
|
||||
expect(partialRedemptionHintNicr).eq(
|
||||
expectedRedemptionPositionHints.partialRedemptionHintNicr
|
||||
);
|
||||
expect(firstHint).eq(expectedRedemptionPositionHints.firstHint);
|
||||
expect(upperHint).eq(expectedRedemptionPositionHints.upperHint);
|
||||
expect(lowerHint).eq(expectedRedemptionPositionHints.lowerHint);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user