Aquarius Documentation
  • Aquarius Loan Documentation
  • Getting Started
    • Networks
    • Protocol Math
      • aToken and Underlying Decimals
      • Interpreting Exchange Rates
      • Calculating Accrued Interest
      • Calculating the APY Using Rate Per Block
    • Gas Costs
  • ATokens
    • Mint
    • Redeem
    • Redeem Underlying
    • Borrow
    • Repay Borrow
    • Repay Borrow Behalf
    • Transfer
    • Liquidate Borrow
    • Key Events
    • Error Codes
    • Failure Info
    • Exchange Rate
    • Get Cash
    • Total Borrow
    • Borrow Balance
    • Borrow Rate
    • Total Supply
    • Underlying Balance
    • Supply Rate
    • Total Reserves
    • Reserve Factor
  • Comptroller
    • Enter Markets
    • Exit Market
    • Get Assets In
    • Collateral Factor
    • Get Account Liquidity
    • Close Factor
    • Liquidation Incentive
    • Key Events
    • Error Codes
    • Failure Info
    • ARS Distribution Speeds
    • Claim ARS
    • Market Metadata
  • Governance
    • Delegate
    • Delegate By Signature
    • Get Current Votes
    • Get Prior Votes
    • Key Events
    • Governor Bravo
    • Quorum Votes
    • Proposal Threshold
    • Proposal Max Operations
    • Voting Delay
    • Voting Period
    • Propose
    • Queue
    • Execute
    • Cancel
    • Get Actions
    • Get Receipt
    • State
    • Cast Vote
    • Cast Vote With Reason
    • Cast Vote By Signature
    • Timelock
    • Pause Guardian
  • Reward Vesting and Staking
    • Reward Vesting
    • ARS Staking
    • Explainer Video
  • LP Staking
    • LP Utility
    • LP Staking Options
    • Zapping LP
    • Maintaining Eligibility Status
    • Explainer Video
  • API
    • ATokenService
      • GET: /atoken
    • MarketHistoryService
      • GET: /market_history/graph
    • ProposalService
      • GET: /proposals
      • GET: /proposals/:id
      • GET: /proposals/statistics
    • VoterService
      • GET: /voters/accounts
      • GET: /voters/accounts/:address
      • GET: /voters/history/:address
      • GET: /voters/:proposalId
    • GovernanceService
      • GET: /governance/aquarius
      • GET: /governance/proposals
      • GET: /governance/proposal_vote_receipts
      • GET: /governance/accounts
    • Shared Data Types
  • Aquarius.js
    • Aquarius Constructor
    • API Methods
      • Account
      • aToken
      • Market History
      • Governance
    • aToken Methods
      • Supply
      • Redeem
      • Borrow
      • Repay Borrow
    • ARS Methods
      • To Checksum Address
      • Get ARS Balance
      • Get ARS Accrued
      • Claim ARS
      • Delegate
      • Delegate By Sig
      • Create Delegate Signature
    • Comptroller Methods
      • Enter Markets
      • Exit Market
    • Ethereum Methods
      • Read
      • Trx
      • Get Balance
    • Governance Methods
      • Cast Vote
      • Cast Vote By Sig
      • Create Vote Signature
    • Price Feed Methods
      • Get Price
    • Utility Methods
      • Get Address
      • Get ABI
      • Get Network Name With Chain ID
  • Security
    • Formal Verification
    • Bug Bounty Program
  • Terms of Service
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  1. Comptroller

Collateral Factor

A aToken's collateral factor can range from 0-90%, and represents the proportionate increase in liquidity (borrow limit) that an account receives by minting the aToken.

Generally, large or liquid assets have high collateral factors, while small or illiquid assets have low collateral factors. If an asset has a 0% collateral factor, it can't be used as collateral (or seized in liquidation), though it can still be borrowed.

Collateral factors can be increased (or decreased) through Aquarius Governance, as market conditions change.

Comptroller

function markets(address aTokenAddress) view returns (bool, uint, bool)
  • aTokenAddress: The address of the aToken to check if listed and get the collateral factor for.

  • RETURN: Tuple of values (isListed, collateralFactorMantissa, isComped); isListed represents whether the comptroller recognizes this aToken; collateralFactorMantissa, scaled by 1e18, is multiplied by a supply balance to determine how much value can be borrowed. The isComped boolean indicates whether or not suppliers and borrowers are distributed ARS tokens.

Solidity

Comptroller troll = Comptroller(0xABCD...);
(bool isListed, uint collateralFactorMantissa, bool isComped) = troll.markets(0x3FDA...);

Web3 1.0

const troll = Comptroller.at(0xABCD...);
const result = await troll.methods.markets(0x3FDA...).call();
const {0: isListed, 1: collateralFactorMantissa, 2: isComped} = result;
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Last updated 1 year ago