// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;
 
/**
 * @title Errors library
 * @author Bend
 * @notice Defines the error messages emitted by the different contracts of the Bend protocol
 */
library Errors {
  enum ReturnCode {
    SUCCESS,
    FAILED
  }
 
  string public constant SUCCESS = "0";
 
  //common errors
  string public constant CALLER_NOT_POOL_ADMIN = "100"; // 'The caller must be the pool admin'
  string public constant CALLER_NOT_ADDRESS_PROVIDER = "101";
  string public constant INVALID_FROM_BALANCE_AFTER_TRANSFER = "102";
  string public constant INVALID_TO_BALANCE_AFTER_TRANSFER = "103";
 
  //math library erros
  string public constant MATH_MULTIPLICATION_OVERFLOW = "200";
  string public constant MATH_ADDITION_OVERFLOW = "201";
  string public constant MATH_DIVISION_BY_ZERO = "202";
 
  //validation & check errors
  string public constant VL_INVALID_AMOUNT = "301"; // 'Amount must be greater than 0'
  string public constant VL_NO_ACTIVE_RESERVE = "302"; // 'Action requires an active reserve'
  string public constant VL_RESERVE_FROZEN = "303"; // 'Action cannot be performed because the reserve is frozen'
  string public constant VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE = "304"; // 'User cannot withdraw more than the available balance'
  string public constant VL_BORROWING_NOT_ENABLED = "305"; // 'Borrowing is not enabled'
  string public constant VL_COLLATERAL_BALANCE_IS_0 = "306"; // 'The collateral balance is 0'
  string public constant VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD = "307"; // 'Health factor is lesser than the liquidation threshold'
  string public constant VL_COLLATERAL_CANNOT_COVER_NEW_BORROW = "308"; // 'There is not enough collateral to cover a new borrow'
  string public constant VL_NO_DEBT_OF_SELECTED_TYPE = "309"; // 'for repayment of stable debt, the user needs to have stable debt, otherwise, he needs to have variable debt'
  string public constant VL_NO_ACTIVE_NFT = "310";
  string public constant VL_NFT_FROZEN = "311";
  string public constant VL_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER = "312"; // 'User did not borrow the specified currency'
  string public constant VL_INVALID_HEALTH_FACTOR = "313";
  string public constant VL_INVALID_ONBEHALFOF_ADDRESS = "314";
  string public constant VL_INVALID_TARGET_ADDRESS = "315";
  string public constant VL_INVALID_RESERVE_ADDRESS = "316";
  string public constant VL_SPECIFIED_LOAN_NOT_BORROWED_BY_USER = "317";
  string public constant VL_SPECIFIED_RESERVE_NOT_BORROWED_BY_USER = "318";
  string public constant VL_HEALTH_FACTOR_HIGHER_THAN_LIQUIDATION_THRESHOLD = "319";
 
  //lend pool errors
  string public constant LP_CALLER_NOT_LEND_POOL_CONFIGURATOR = "400"; // 'The caller of the function is not the lending pool configurator'
  string public constant LP_IS_PAUSED = "401"; // 'Pool is paused'
  string public constant LP_NO_MORE_RESERVES_ALLOWED = "402";
  string public constant LP_NOT_CONTRACT = "403";
  string public constant LP_BORROW_NOT_EXCEED_LIQUIDATION_THRESHOLD = "404";
  string public constant LP_BORROW_IS_EXCEED_LIQUIDATION_PRICE = "405";
  string public constant LP_NO_MORE_NFTS_ALLOWED = "406";
  string public constant LP_INVALIED_USER_NFT_AMOUNT = "407";
  string public constant LP_INCONSISTENT_PARAMS = "408";
  string public constant LP_NFT_IS_NOT_USED_AS_COLLATERAL = "409";
  string public constant LP_CALLER_MUST_BE_AN_BTOKEN = "410";
  string public constant LP_INVALIED_NFT_AMOUNT = "411";
  string public constant LP_NFT_HAS_USED_AS_COLLATERAL = "412";
  string public constant LP_DELEGATE_CALL_FAILED = "413";
  string public constant LP_AMOUNT_LESS_THAN_EXTRA_DEBT = "414";
  string public constant LP_AMOUNT_LESS_THAN_REDEEM_THRESHOLD = "415";
 
  //lend pool loan errors
  string public constant LPL_INVALID_LOAN_STATE = "480";
  string public constant LPL_INVALID_LOAN_AMOUNT = "481";
  string public constant LPL_INVALID_TAKEN_AMOUNT = "482";
  string public constant LPL_AMOUNT_OVERFLOW = "483";
  string public constant LPL_BID_PRICE_LESS_THAN_LIQUIDATION_PRICE = "484";
  string public constant LPL_BID_PRICE_LESS_THAN_HIGHEST_PRICE = "485";
  string public constant LPL_BID_REDEEM_DURATION_HAS_END = "486";
  string public constant LPL_BID_USER_NOT_SAME = "487";
  string public constant LPL_BID_REPAY_AMOUNT_NOT_ENOUGH = "488";
  string public constant LPL_BID_AUCTION_DURATION_HAS_END = "489";
  string public constant LPL_BID_AUCTION_DURATION_NOT_END = "490";
  string public constant LPL_BID_PRICE_LESS_THAN_BORROW = "491";
  string public constant LPL_INVALID_BIDDER_ADDRESS = "492";
  string public constant LPL_AMOUNT_LESS_THAN_BID_FINE = "493";
 
  //common token errors
  string public constant CT_CALLER_MUST_BE_LEND_POOL = "500"; // 'The caller of this function must be a lending pool'
  string public constant CT_INVALID_MINT_AMOUNT = "501"; //invalid amount to mint
  string public constant CT_INVALID_BURN_AMOUNT = "502"; //invalid amount to burn
 
  //reserve logic errors
  string public constant RL_RESERVE_ALREADY_INITIALIZED = "601"; // 'Reserve has already been initialized'
  string public constant RL_LIQUIDITY_INDEX_OVERFLOW = "602"; //  Liquidity index overflows uint128
  string public constant RL_VARIABLE_BORROW_INDEX_OVERFLOW = "603"; //  Variable borrow index overflows uint128
  string public constant RL_LIQUIDITY_RATE_OVERFLOW = "604"; //  Liquidity rate overflows uint128
  string public constant RL_VARIABLE_BORROW_RATE_OVERFLOW = "605"; //  Variable borrow rate overflows uint128
 
  //configure errors
  string public constant LPC_RESERVE_LIQUIDITY_NOT_0 = "700"; // 'The liquidity of the reserve needs to be 0'
  string public constant LPC_INVALID_CONFIGURATION = "701"; // 'Invalid risk parameters for the reserve'
  string public constant LPC_CALLER_NOT_EMERGENCY_ADMIN = "702"; // 'The caller must be the emergency admin'
  string public constant LPC_INVALIED_BNFT_ADDRESS = "703";
  string public constant LPC_INVALIED_LOAN_ADDRESS = "704";
  string public constant LPC_NFT_LIQUIDITY_NOT_0 = "705";
 
  //reserve config errors
  string public constant RC_INVALID_LTV = "730";
  string public constant RC_INVALID_LIQ_THRESHOLD = "731";
  string public constant RC_INVALID_LIQ_BONUS = "732";
  string public constant RC_INVALID_DECIMALS = "733";
  string public constant RC_INVALID_RESERVE_FACTOR = "734";
  string public constant RC_INVALID_REDEEM_DURATION = "735";
  string public constant RC_INVALID_AUCTION_DURATION = "736";
  string public constant RC_INVALID_REDEEM_FINE = "737";
  string public constant RC_INVALID_REDEEM_THRESHOLD = "738";
 
  //address provider erros
  string public constant LPAPR_PROVIDER_NOT_REGISTERED = "760"; // 'Provider is not registered'
  string public constant LPAPR_INVALID_ADDRESSES_PROVIDER_ID = "761";
}