0g-chain/x/cdp/keeper/seize.go
Kevin Davis 82f637649c
[R4R] Testnet-5k proposal (#404)
* R4R: BEP3 module (#370)

* bep3 module scaffold from cosmos/scaffold

* Populated types, keeper with HTLT msgs, module params, and scaffolding for keys, and genesis

* added KavaHTLT struct, UpdateHTLT struct, resolved compilation errors

* refactored kavaHTLT struct <-> msgs

* Implemented params, refactored UpdateKavaHTLT to UpdateKHTLT interface

* Updated keeper with byTimeIndex methods

* HTLT creation flow

* adjustments in prep for repo config updates

* App moudle updated for bep3, MsgCreateHTLT tested, HTLT keeper methods tested

* Updated bep3 params to match spec

* tests for MsgRefundHTLT, MsgDepositHTLT, MsgClaimHTLT

* AddHtlt cli cmd, queryHtlts cmd, added conversion funcs for binance -> cosmos types, refactored MsgCreateHTLT from binance.AccAddress to sdk.AccAddress

* working edits related to bep3-deputy compatibility

* removed binance-chain go sdk dependency

* updated msg ValidateBasic() return to sdk.Error type

* implement MsgCalculateSwapID

* added MsgCalculateSwapID test, updated randomNumberHash type to []byte

* removed binance type conversions

* msg codec registration

* clean /types directory

* CLI cmds:create htlt, query htlt

* update keeper logic

* handle MsgCreateHTLT

* implement htlt type, msg types

* implement global chain types

* update querier

* added go-ethereum to go mod

* refactor QuerySwap to QueryHTLT

* update HTLTMsg to MsgCreateHTLT

* implemented htlt deposit

* add token transfer to MsgCreateHTLT

* implement refund, claim client txs

* add refund/claim cmds to tx cmd

* commiting go.sum for build

* implemented keeper claim logic

* add RandomNumberHash to create-htlt event

* implement refund keeper logic

* AddHTLT updated to CreateHTLT

* added params keeper

* updated params to single chain, added sample genesis file

* implemented htlt keeper param checks

* removed go-ethereum dependency

* updated go.sum

* housekeeping on keeper tests

* updated cli tx cmds

* ran go.tidy

* remove links from module readme

* updated coin construction in tests

* added expectedIncome checks in ValidateBasic()

* made ValidateAsset() more robust

* update param format for tests

* added basic HTLTByTime index

* implement abci, fix expectedIncome validation

* byTime index updated to blocks, added swap ID & expiration block to htlt

* added not-expired check to HTLT claims

* cross-chain mint/burn logic, htlt string type refactored to []byte

* fix bnb_deputy_address param

* remove abci panic

* cmn.HexBytes, byTime index iteration update, claim-mint logic update

* update genesis example

* general codebase cleaning

* renamed HTLT to AtomicSwap

* staging for PR

* updated naming conventions

* refactor + revisions

* removed code related to deposits & swap block index

* added timestamp validation comment

* post-refactor housekeeping

* post refactor housekeeping (keeper)

* remove GenesisAtomicSwap type

* refactor asset supply logic

* BeginBlocker expires swaps automatically

* param asset.limit type updated to sdk.Int

* remove claimed swaps from block index

* fix DefaultDeputyAddress

* removed BaseSwap

* revisions

* total genesis coins

* updated tx examples

* Automatically update fees for risky cdps (#381)

* wip: sketch implementation

* adding initial function to calcuate risky fees for cdps

* adding todo comment to fix the function arguments

* changing the function arguments

* adding multiplication, print error, change types

* get the number of periods, add comments and questios for code review

* adding specification notes

* removing old comment

* replace collateral with collateral denom

* remove todo and clarify comment

* Update x/cdp/keeper/fees.go

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update x/cdp/keeper/fees.go

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update go.sum

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update x/cdp/keeper/fees.go

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update x/cdp/keeper/fees.go

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update x/cdp/keeper/fees.go

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update x/cdp/abci.go

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* updating fees

* error handling and propogation

* fix collat denom variable

* fix build issues, error, variable names, parameter type

* Update x/cdp/abci.go

Use `err` as name instead of `e`

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update x/cdp/keeper/fees.go

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* fixing error variable name

* changing call to method to compute risky cdps fees

* changing the calcualation to select risky cdps to be based on normalized ratio

* adding skeleton for test methods, adding skeleton helper function for creating cdps for use in tests

* fixing function call to helper method

* fix assignment, calling function that returns two variables instead of one

* adding comment and fixing call to create cdps

* adding create cdps function and updating / fixing the test. one of the expected tests is failing, need to figure out why that is. added a todo question to note it

* logging the cdp object before and after updating. it seems that the fees are not set / written before or after

* adding interim changed

* updated

* fixing normalized ratio

* code cleanup

* changing print of accumulated fees

* removing debug code

* remove completed todo

* remove old variable

* remove spewing print statement

* remove dead todo

* adding note about prices for future

* remove dead code

* try to fix test

* fix types

* fix types

* fix context in call

* changing back as new version breaks a test

* fix

* cleanup, removing logging and old code

* remove dead code

* removing changes to cdp test

* Update x/cdp/keeper/fees.go

Remove old comment as suggested

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update x/cdp/spec/04_begin_block.md

Fix typo as suggested

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

Co-authored-by: Kevin Davis <karzak@users.noreply.github.com>

* Add Savings Rate (#365)

* fix: ensure cdp module accounts created at gensis

* feat: add savings rate

* chore: update alias

* fix: update default test param values

* chore: update spec for savings rate

* fix: add distribution time to genesis state

* fix: iterate over accounts using callback function

* feat: use seprate mod account for savings rate

* fix: remove mod account coins from total supply

* address review comments

* fix: genesis function initialization

* fix: update alias

* add comment about maintaining module account list

* feat: add genesis example

* R4R: bep3 module upgrades (#388)

* bep3 module scaffold from cosmos/scaffold

* Populated types, keeper with HTLT msgs, module params, and scaffolding for keys, and genesis

* added KavaHTLT struct, UpdateHTLT struct, resolved compilation errors

* refactored kavaHTLT struct <-> msgs

* Implemented params, refactored UpdateKavaHTLT to UpdateKHTLT interface

* Updated keeper with byTimeIndex methods

* HTLT creation flow

* adjustments in prep for repo config updates

* App moudle updated for bep3, MsgCreateHTLT tested, HTLT keeper methods tested

* Updated bep3 params to match spec

* tests for MsgRefundHTLT, MsgDepositHTLT, MsgClaimHTLT

* AddHtlt cli cmd, queryHtlts cmd, added conversion funcs for binance -> cosmos types, refactored MsgCreateHTLT from binance.AccAddress to sdk.AccAddress

* working edits related to bep3-deputy compatibility

* removed binance-chain go sdk dependency

* updated msg ValidateBasic() return to sdk.Error type

* implement MsgCalculateSwapID

* added MsgCalculateSwapID test, updated randomNumberHash type to []byte

* removed binance type conversions

* msg codec registration

* clean /types directory

* CLI cmds:create htlt, query htlt

* update keeper logic

* handle MsgCreateHTLT

* implement htlt type, msg types

* implement global chain types

* update querier

* added go-ethereum to go mod

* refactor QuerySwap to QueryHTLT

* update HTLTMsg to MsgCreateHTLT

* implemented htlt deposit

* add token transfer to MsgCreateHTLT

* implement refund, claim client txs

* add refund/claim cmds to tx cmd

* commiting go.sum for build

* implemented keeper claim logic

* add RandomNumberHash to create-htlt event

* implement refund keeper logic

* AddHTLT updated to CreateHTLT

* added params keeper

* updated params to single chain, added sample genesis file

* implemented htlt keeper param checks

* removed go-ethereum dependency

* updated go.sum

* housekeeping on keeper tests

* updated cli tx cmds

* ran go.tidy

* remove links from module readme

* updated coin construction in tests

* added expectedIncome checks in ValidateBasic()

* made ValidateAsset() more robust

* update param format for tests

* added basic HTLTByTime index

* implement abci, fix expectedIncome validation

* byTime index updated to blocks, added swap ID & expiration block to htlt

* added not-expired check to HTLT claims

* cross-chain mint/burn logic, htlt string type refactored to []byte

* fix bnb_deputy_address param

* remove abci panic

* cmn.HexBytes, byTime index iteration update, claim-mint logic update

* update genesis example

* general codebase cleaning

* renamed HTLT to AtomicSwap

* staging for PR

* updated naming conventions

* refactor + revisions

* removed code related to deposits & swap block index

* added timestamp validation comment

* post-refactor housekeeping

* post refactor housekeeping (keeper)

* remove GenesisAtomicSwap type

* refactor asset supply logic

* BeginBlocker expires swaps automatically

* param asset.limit type updated to sdk.Int

* remove claimed swaps from block index

* fix DefaultDeputyAddress

* removed BaseSwap

* revisions

* total genesis coins

* updated tx examples

* timestamp to unix

* add past timestamp limit

* update random number byte encoding

* add recipient_other_chain to AtomicSwap

* add TODO for timestamp arg parsing

* generate secure random numbers

* update tx cli

* keeper tests

* add bnb token

* bep3 params test set up, test CreateAtomicSwap

* swap table tests

* Revert "bep3 params test set up, test CreateAtomicSwap"

This reverts commits containing tests.

* use tmtime.Now()

* Kava distribution module (#387)

* wip: kavadist module structure

* feat: implement minting logic

* wip: sketch module

* wip: module level code

* wip: bug fixes

* wip: add tests

* wip: resolve todos and tidy

* fix: remove unused file

* address review comments

* fix: update genesis for guide (#394)

* add kava_dist to sample genesis file (#396)

* R4R: BEP3 module test suite (#395)

* refactor secure rng

* refactor common tests, implement keeper tests

* implement asset tests

* implement params, querier tests

* implement keeper swap tests

* refactor import naming conventions

* implement core types tests

* improve keeper swap tests

* implement genesis types test

* implement params test + revisions

* implement duplicate swap test

* implement duplicate swap ID test

* R4R: BEP3 additional features + module test suite (#397)

* update and reorder errors

* implement swap deletion block delay

* add swap deletion block delay, set up tests

* add secure random number gen

* implement AtomicSwapLongtermStorage index

* fix syntax error

* abci test updates

* implement handler test

* implement core genesis tests

* update asset supply logic

* implement functional asset supply

* pretty print atomic swaps

* requested revisions

* fix test suite post merge

* implement and integrate asset supply tests

* update import genesis, add storage duration param

* implement swap deletion ABCI test

* go mod tidy

* remove duplicated interface assertion

* add new bep3 param to contrib genesis file

* remove btc from supported assets

* revisions: LongtermStorageDuration param

* revisions: suite ctx, fix genesis, update contrib

* implement AssetSupply type, store key, keeper

* integrate supply and swaps; genesis, tests

* remove legacy comments

* requested revisions

* update alias

* Swagger Rest Automating Testing With Dredd  (#390)

* swagger testing and mods

* fixed a test

* fixed withdraw address

* adding script to start the chain

* fixed val rewards test

* fix outstanding rewards test

* fixed rewards

* hooks skeleton

* adding test file and hooks

* updates on the hooks working

* now creates a transaction and sends to the chain via rest api successfully

* small fix - now works

* 34 tests now passing successfully

* fix print statement error

* instructions on how to run the tests

* changing function names when to run the hooks

* adding instructions on how to setup and run the dredd tests

* removing large error output file

* removing binary file

* removing more output logging files

* creating a vote on a proposal to send to the blockchain

* adding instructions on how to setup chain

* adding function to get account number and sequence number

* adding send msg to blockchain method

* posting vote tx to blockchain - successfully prepares and sends vote to endpoint but endpoint returns 'inactive proposal with id'

* successfully depositing 600 stake to a proposal

* successfully depositing onto a proposal and then voting on it

* got another governance test working now after submitting a vote to the blockchain

* updating instructions on how to run

* fixed another voting test

* fixed deposits test

* fixed another gov test

* fix print line

* fix circle ci build issue with println

* improving instructions on how to build and run the hooks and dredd tests

* improving instructions on how to build and run the hooks and dredd tests

* finally fixed param change governance proposal test

* trying to unskip tests wip

* fixed gov/proposals test

* fixed another test

* fixed a slashing test

* fixed another redelegation test

* fixed another unbonding delegation test

* fixed more staking tests

* fixed another staking test

* fixed another test

* fixed more tests. 50 now passing, 15 failing

* fixed mislabeled variable

* managed to fix unjail test

* fixed bank acct transfers test

* change certain types from number to string to match the output, typo fix

* another typo fix

* fixed delegation test

* finally figured out and fixed the latest blocks types mismatch - fixed the test

* fixed staking delegators validators test

* removed and noted unimplemented tests from yaml file. fixed blocks height test

* fixed transcations test

* adding functionality to send transfer of coins to blockchain, and to send delegations

* updating the yaml to line up with a valid message format

* added delegation method

* adding test results showing 57 are now passing and only 5 failing

* remove test yaml file from pull req

* testing file updates

* adding test memo

* added undelegation hook method - fixed unbonding delegation test

* fixed the get tx from hash test

* adding not if you encounter validator set is different errors how to fix. 59 tests now passsing, 3 failing

* adding test results showing 59 passing, 3 failing

* finally fixed encode test - 60 tests now passing only 2 failing

* adding test results 60 passing 1 failing

* more test updates

* finally fixed decode test - 61 tests now passing only 1 failing

* test results 61 tests passing 1 failing

* remove dead code

* all 62 tests are now passingga swagger.yaml  0 failing

* used for testing and generating transactions and testing hooks

* updating run instructions

* more instructions updates

* updating the test file

* adding note on reading from a file

* refactoring code and cleanup

* refactoring getting the keybase

* code cleanup for address, keyname methods, remove unused code

* more code cleanup around addresses

* updating the instructions on how to run the dredd tests

* adding comment

* adding additional requirements to the go.mod dependency file

* remove hardcoded home directory, read using os golang library

* increase timeout in example run script

* remove hardcoded home directory

* reordering commands to get rid of errors if key directory is deleted

* changing to use temporary directory

* updating dredd timeout time

* finally managed to get the script wroking using a temporary directory instead of the default

* adding notes and comments

* changing to use a temp directory instead of default directory

* remove un-needed file

* rename debugging tools folder

* adding instructions to install dredd and npm

* Update swagger-ui/startchain.sh

Send output to dev null not to console

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* Update swagger-ui/startchain.sh

Send output to dev null not to console

Co-Authored-By: Kevin Davis <karzak@users.noreply.github.com>

* adding new version of test.go to setup the chain

* adding todo to update instructions for new workflow

* updating script to start and setup the chain

* updating the transaction hash test

* update the start chain script to setup the chain correctly

* add the script to stop the chain and the rest server

* updated the instructions for the new workflow so that all the tests pass the first time

* updated the instructions on how to run the tests

* update instructions for printing logs or not

* updating the startchain script to add messages when starting the rest server and preparing transactions

* adding print messages when stop chain is completed

* updating test results to just include test output and not the debug log statements

* cleaning up the messages that are printed to the user

* moving files to their own directory

* build go test file and remove previous binary

* move instructions

* updating instructions now that test file is auto built

* building, running dredd tests, propagating error code, shut down blockchain all in one script

* fix object type to array type for block latests

* cleaning up the script

* rename script as it now does all the setup, test running, shutdown, and cleanup

* update instructions for new workflow

* adding a shell script to call from the makefile

* adding a make command to build and run all the dredd tests

* update instructions to run using make

* updated code review comment

* minor update to instructions

* update remove file command so doesn't print an error if the file has already been deleted

* renaming folder and test

* adjust code comment

* removing example test results

* updating instructions to remove reference to the test results

* remove old hooks file

* remove obsolete code comment

* remove swagger file, will change references to the other one

* remove shell script, will now use the one called from make instead

* renaming as underscore messes up go build

* clean up script, fix return code issues

* cleanup output file

* fix object to array issue

* add comments to explain functionality

* use variables for kvd home and kvcli home, check for errors

* change the kvcli home directory. need to take this from command line

* take kvcli from command line parameter to golang file

* take kvcli directory from command line parameter

Co-authored-by: John Maheswaran <john@kava.io>
Co-authored-by: Kevin Davis <karzak@users.noreply.github.com>

* R4R: Update BEP3 rest endpoints + format example requests (#402)

* update and reorder errors

* implement swap deletion block delay

* add swap deletion block delay, set up tests

* add secure random number gen

* implement AtomicSwapLongtermStorage index

* fix syntax error

* abci test updates

* implement handler test

* implement core genesis tests

* update asset supply logic

* implement functional asset supply

* pretty print atomic swaps

* requested revisions

* fix test suite post merge

* implement and integrate asset supply tests

* update import genesis, add storage duration param

* implement swap deletion ABCI test

* go mod tidy

* remove duplicated interface assertion

* add new bep3 param to contrib genesis file

* remove btc from supported assets

* revisions: LongtermStorageDuration param

* revisions: suite ctx, fix genesis, update contrib

* implement AssetSupply type, store key, keeper

* integrate supply and swaps; genesis, tests

* remove legacy comments

* requested revisions

* update alias

* rest queries

* implement BEP3 REST txs

* draft rest server readme + example json files

* tested all swap rest examples

* implement query swaps rest endpoint

* feat: update genesis examples

* fix: use post instead of put (#405)

Co-authored-by: Denali Marsh <denali@kava.io>
Co-authored-by: John Maheswaran <jmaheswaran@users.noreply.github.com>
Co-authored-by: John Maheswaran <john@kava.io>
2020-03-27 22:54:00 -04:00

137 lines
5.8 KiB
Go

package keeper
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/kava-labs/kava/x/cdp/types"
)
// SeizeCollateral liquidates the collateral in the input cdp.
// the following operations are performed:
// 1. updates the fees for the input cdp,
// 2. sends collateral for all deposits from the cdp module to the liquidator module account
// 3. Applies the liquidation penalty and mints the corresponding amount of debt coins in the cdp module
// 3. moves debt coins from the cdp module to the liquidator module account,
// 4. decrements the total amount of principal outstanding for that collateral type
// (this is the equivalent of saying that fees are no longer accumulated by a cdp once it gets liquidated)
func (k Keeper) SeizeCollateral(ctx sdk.Context, cdp types.CDP) sdk.Error {
// Calculate the previous collateral ratio
oldCollateralToDebtRatio := k.CalculateCollateralToDebtRatio(ctx, cdp.Collateral, cdp.Principal.Add(cdp.AccumulatedFees))
// Update fees
periods := sdk.NewInt(ctx.BlockTime().Unix()).Sub(sdk.NewInt(cdp.FeesUpdated.Unix()))
fees := k.CalculateFees(ctx, cdp.Principal.Add(cdp.AccumulatedFees), periods, cdp.Collateral[0].Denom)
cdp.AccumulatedFees = cdp.AccumulatedFees.Add(fees)
cdp.FeesUpdated = ctx.BlockTime()
// Move debt coins from cdp to liquidator account
deposits := k.GetDeposits(ctx, cdp.ID)
debt := sdk.ZeroInt()
for _, pc := range cdp.Principal {
debt = debt.Add(pc.Amount)
}
for _, dc := range cdp.AccumulatedFees {
debt = debt.Add(dc.Amount)
}
modAccountDebt := k.getModAccountDebt(ctx, types.ModuleName)
if modAccountDebt.LT(debt) {
debt = modAccountDebt
}
debtCoin := sdk.NewCoin(k.GetDebtDenom(ctx), debt)
err := k.supplyKeeper.SendCoinsFromModuleToModule(ctx, types.ModuleName, types.LiquidatorMacc, sdk.NewCoins(debtCoin))
if err != nil {
return err
}
// liquidate deposits and send collateral from cdp to liquidator
for _, dep := range deposits {
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeCdpLiquidation,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(types.AttributeKeyCdpID, fmt.Sprintf("%d", cdp.ID)),
sdk.NewAttribute(types.AttributeKeyDepositor, fmt.Sprintf("%s", dep.Depositor)),
),
)
err := k.supplyKeeper.SendCoinsFromModuleToModule(ctx, types.ModuleName, types.LiquidatorMacc, dep.Amount)
if err != nil {
return err
}
k.DeleteDeposit(ctx, dep.CdpID, dep.Depositor)
}
err = k.AuctionCollateral(ctx, deposits, debt, cdp.Principal[0].Denom)
if err != nil {
return err
}
// Decrement total principal for this collateral type
for _, dc := range cdp.Principal {
feeAmount := cdp.AccumulatedFees.AmountOf(dc.Denom)
coinsToDecrement := sdk.NewCoins(dc)
if feeAmount.IsPositive() {
feeCoins := sdk.NewCoins(sdk.NewCoin(dc.Denom, feeAmount))
coinsToDecrement = coinsToDecrement.Add(feeCoins)
}
k.DecrementTotalPrincipal(ctx, cdp.Collateral[0].Denom, coinsToDecrement)
}
k.RemoveCdpOwnerIndex(ctx, cdp)
k.RemoveCdpCollateralRatioIndex(ctx, cdp.Collateral[0].Denom, cdp.ID, oldCollateralToDebtRatio)
k.DeleteCDP(ctx, cdp)
return nil
}
// HandleNewDebt compounds the accumulated fees for the input collateral and principal coins.
// the following operations are performed:
// 1. The fees accumulated since the last block are calculated
// 2. The fees are minted, split between the liquidator module account (surplus) and the savings rate module account (savings rate) according to the savings rate parameter.
// 2. An equal amount of debt coins are minted in the cdp module account
// 3. updates the total amount of principal for the input collateral type in the store,
func (k Keeper) HandleNewDebt(ctx sdk.Context, collateralDenom string, principalDenom string, periods sdk.Int) {
dp, _ := k.GetDebtParam(ctx, principalDenom)
savingsRate := dp.SavingsRate
previousDebt := k.GetTotalPrincipal(ctx, collateralDenom, principalDenom)
feeCoins := sdk.NewCoins(sdk.NewCoin(principalDenom, previousDebt))
newFees := k.CalculateFees(ctx, feeCoins, periods, collateralDenom)
if newFees.IsZero() {
return
}
newFeesSavings := sdk.NewDecFromInt(newFees.AmountOf(principalDenom)).Mul(savingsRate).RoundInt()
newFeesSurplus := newFees.AmountOf(principalDenom).Sub(newFeesSavings)
k.MintDebtCoins(ctx, types.ModuleName, k.GetDebtDenom(ctx), newFees)
k.supplyKeeper.MintCoins(ctx, types.LiquidatorMacc, sdk.NewCoins(sdk.NewCoin(principalDenom, newFeesSurplus)))
k.supplyKeeper.MintCoins(ctx, types.SavingsRateMacc, sdk.NewCoins(sdk.NewCoin(principalDenom, newFeesSavings)))
k.SetTotalPrincipal(ctx, collateralDenom, principalDenom, feeCoins.Add(newFees).AmountOf(principalDenom))
}
// LiquidateCdps seizes collateral from all CDPs below the input liquidation ratio
func (k Keeper) LiquidateCdps(ctx sdk.Context, marketID string, denom string, liquidationRatio sdk.Dec) sdk.Error {
price, err := k.pricefeedKeeper.GetCurrentPrice(ctx, marketID)
if err != nil {
return err
}
// price = $0.5
// liquidation ratio = 1.5
// normalizedRatio = (1/(0.5/1.5)) = 3
normalizedRatio := sdk.OneDec().Quo(price.Price.Quo(liquidationRatio))
cdpsToLiquidate := k.GetAllCdpsByDenomAndRatio(ctx, denom, normalizedRatio)
for _, c := range cdpsToLiquidate {
err := k.SeizeCollateral(ctx, c)
if err != nil {
return err
}
}
return nil
}
// ApplyLiquidationPenalty multiplies the input debt amount by the liquidation penalty and mints the debt coins in the cdp module account
func (k Keeper) ApplyLiquidationPenalty(ctx sdk.Context, denom string, debt sdk.Int) sdk.Int {
penalty := k.getLiquidationPenalty(ctx, denom)
penaltyAmount := sdk.NewDecFromInt(debt).Mul(penalty).RoundInt()
return penaltyAmount
}
func (k Keeper) getModAccountDebt(ctx sdk.Context, accountName string) sdk.Int {
macc := k.supplyKeeper.GetModuleAccount(ctx, accountName)
return macc.GetCoins().AmountOf(k.GetDebtDenom(ctx))
}