0g-chain/x/incentive/keeper/rewards_usdx_unit_test.go
Ruaridh c7962e45c0
Swaps accumulate global rewards (#947)
* add get set methods for swap reward indexes

* add get set methods for swap accrual time

* tidy up location of multi periods

* add swap reward periods to params

* add initial legacy types for incentive

* minor refactor of migration code

* add incentive migration for swap params

* minor incentive test refactors

* add math methods to RewardIndexes

* add keeper method to increment global indexes

* add swap keeper to incentive keeper

* indicate if pool shares were found or not

* add accumulator to compute new rewards each block

* accumulate swap rewards globally

* remove unecessary keeper method

* expand doc comments on accumulator methods

* test precision not lost in accumulation

* minor fixes from merge

* rename storeGlobalDelegatorFactor to match others

* fix migration from merge

* fix bug in app setup

* fix accumulation bug when starting with no state

* rename swap files to match others

* add swap accumulation times to genesis

* remove old migration refactor

* minor updates to spec

* add high level description of how rewards work
2021-07-07 14:23:06 +01:00

312 lines
9.4 KiB
Go

package keeper_test
import (
"testing"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/stretchr/testify/suite"
cdptypes "github.com/kava-labs/kava/x/cdp/types"
"github.com/kava-labs/kava/x/incentive/types"
)
// usdxRewardsUnitTester contains common methods for running unit tests for keeper methods related to the USDX minting rewards
type usdxRewardsUnitTester struct {
unitTester
}
func (suite *usdxRewardsUnitTester) storeGlobalUSDXIndexes(indexes types.RewardIndexes) {
for _, ri := range indexes {
suite.keeper.SetUSDXMintingRewardFactor(suite.ctx, ri.CollateralType, ri.RewardFactor)
}
}
func (suite *usdxRewardsUnitTester) storeClaim(claim types.USDXMintingClaim) {
suite.keeper.SetUSDXMintingClaim(suite.ctx, claim)
}
type InitializeUSDXMintingClaimTests struct {
usdxRewardsUnitTester
}
func TestInitializeUSDXMintingClaims(t *testing.T) {
suite.Run(t, new(InitializeUSDXMintingClaimTests))
}
func (suite *InitializeUSDXMintingClaimTests) TestClaimIndexIsSetWhenClaimDoesNotExist() {
collateralType := "bnb-a"
subspace := paramsWithSingleUSDXRewardPeriod(collateralType)
suite.keeper = suite.NewKeeper(subspace, nil, nil, nil, nil, nil, nil)
cdp := NewCDPBuilder(arbitraryAddress(), collateralType).Build()
globalIndexes := types.RewardIndexes{{
CollateralType: collateralType,
RewardFactor: d("0.2"),
}}
suite.storeGlobalUSDXIndexes(globalIndexes)
suite.keeper.InitializeUSDXMintingClaim(suite.ctx, cdp)
syncedClaim, f := suite.keeper.GetUSDXMintingClaim(suite.ctx, cdp.Owner)
suite.True(f)
suite.Equal(globalIndexes, syncedClaim.RewardIndexes)
}
func (suite *InitializeUSDXMintingClaimTests) TestClaimIndexIsSetWhenClaimExists() {
collateralType := "bnb-a"
subspace := paramsWithSingleUSDXRewardPeriod(collateralType)
suite.keeper = suite.NewKeeper(subspace, nil, nil, nil, nil, nil, nil)
claim := types.USDXMintingClaim{
BaseClaim: types.BaseClaim{
Owner: arbitraryAddress(),
},
RewardIndexes: types.RewardIndexes{{
CollateralType: collateralType,
RewardFactor: d("0.1"),
}},
}
suite.storeClaim(claim)
globalIndexes := types.RewardIndexes{{
CollateralType: collateralType,
RewardFactor: d("0.2"),
}}
suite.storeGlobalUSDXIndexes(globalIndexes)
cdp := NewCDPBuilder(claim.Owner, collateralType).Build()
suite.keeper.InitializeUSDXMintingClaim(suite.ctx, cdp)
syncedClaim, _ := suite.keeper.GetUSDXMintingClaim(suite.ctx, cdp.Owner)
suite.Equal(globalIndexes, syncedClaim.RewardIndexes)
}
type SynchronizeUSDXMintingRewardTests struct {
usdxRewardsUnitTester
}
func TestSynchronizeUSDXMintingReward(t *testing.T) {
suite.Run(t, new(SynchronizeUSDXMintingRewardTests))
}
func (suite *SynchronizeUSDXMintingRewardTests) TestRewardUnchangedWhenGlobalIndexesUnchanged() {
unchangingRewardIndexes := nonEmptyRewardIndexes
collateralType := extractFirstCollateralType(unchangingRewardIndexes)
claim := types.USDXMintingClaim{
BaseClaim: types.BaseClaim{
Owner: arbitraryAddress(),
Reward: c(types.USDXMintingRewardDenom, 0),
},
RewardIndexes: unchangingRewardIndexes,
}
suite.storeClaim(claim)
suite.storeGlobalUSDXIndexes(unchangingRewardIndexes)
cdp := NewCDPBuilder(claim.Owner, collateralType).WithPrincipal(i(1e12)).Build()
suite.keeper.SynchronizeUSDXMintingReward(suite.ctx, cdp)
syncedClaim, _ := suite.keeper.GetUSDXMintingClaim(suite.ctx, claim.Owner)
suite.Equal(claim.Reward, syncedClaim.Reward)
}
func (suite *SynchronizeUSDXMintingRewardTests) TestRewardIsIncrementedWhenGlobalIndexIncreased() {
collateralType := "bnb-a"
claim := types.USDXMintingClaim{
BaseClaim: types.BaseClaim{
Owner: arbitraryAddress(),
Reward: c(types.USDXMintingRewardDenom, 0),
},
RewardIndexes: types.RewardIndexes{
{
CollateralType: collateralType,
RewardFactor: d("0.1"),
},
},
}
suite.storeClaim(claim)
globalIndexes := types.RewardIndexes{
{
CollateralType: collateralType,
RewardFactor: d("0.2"),
},
}
suite.storeGlobalUSDXIndexes(globalIndexes)
cdp := NewCDPBuilder(claim.Owner, collateralType).WithPrincipal(i(1e12)).Build()
suite.keeper.SynchronizeUSDXMintingReward(suite.ctx, cdp)
syncedClaim, _ := suite.keeper.GetUSDXMintingClaim(suite.ctx, claim.Owner)
// reward is ( new index - old index ) * cdp.TotalPrincipal
suite.Equal(c(types.USDXMintingRewardDenom, 1e11), syncedClaim.Reward)
}
func (suite *SynchronizeUSDXMintingRewardTests) TestRewardIsIncrementedWhenNewRewardAddedAndClaimDoesNotExit() {
collateralType := "bnb-a"
globalIndexes := types.RewardIndexes{
{
CollateralType: collateralType,
RewardFactor: d("0.2"),
},
}
suite.storeGlobalUSDXIndexes(globalIndexes)
cdp := NewCDPBuilder(arbitraryAddress(), collateralType).WithPrincipal(i(1e12)).Build()
suite.keeper.SynchronizeUSDXMintingReward(suite.ctx, cdp)
syncedClaim, _ := suite.keeper.GetUSDXMintingClaim(suite.ctx, cdp.Owner)
// The global index was not around when this cdp was created as it was not stored in a claim.
// Therefore it must have been added via params after.
// To include rewards since the params were updated, the old index should be assumed to be 0.
// reward is ( new index - old index ) * cdp.TotalPrincipal
suite.Equal(c(types.USDXMintingRewardDenom, 2e11), syncedClaim.Reward)
}
func (suite *SynchronizeUSDXMintingRewardTests) TestClaimIndexIsUpdatedWhenGlobalIndexIncreased() {
claimsRewardIndexes := nonEmptyRewardIndexes
collateralType := extractFirstCollateralType(claimsRewardIndexes)
claim := types.USDXMintingClaim{
BaseClaim: types.BaseClaim{
Owner: arbitraryAddress(),
Reward: c(types.USDXMintingRewardDenom, 0),
},
RewardIndexes: claimsRewardIndexes,
}
suite.storeClaim(claim)
globalIndexes := increaseRewardFactors(claimsRewardIndexes)
suite.storeGlobalUSDXIndexes(globalIndexes)
cdp := NewCDPBuilder(claim.Owner, collateralType).Build()
suite.keeper.SynchronizeUSDXMintingReward(suite.ctx, cdp)
syncedClaim, _ := suite.keeper.GetUSDXMintingClaim(suite.ctx, claim.Owner)
// Only the claim's index for `collateralType` should have been changed
i, _ := globalIndexes.Get(collateralType)
expectedIndexes := claimsRewardIndexes.With(collateralType, i)
suite.Equal(expectedIndexes, syncedClaim.RewardIndexes)
}
func (suite *SynchronizeUSDXMintingRewardTests) TestClaimIndexIsUpdatedWhenNewRewardAddedAndClaimAlreadyExists() {
claimsRewardIndexes := types.RewardIndexes{
{
CollateralType: "bnb-a",
RewardFactor: d("0.1"),
},
{
CollateralType: "busd-b",
RewardFactor: d("0.4"),
},
}
newRewardIndex := types.NewRewardIndex("xrp-a", d("0.0001"))
claim := types.USDXMintingClaim{
BaseClaim: types.BaseClaim{
Owner: arbitraryAddress(),
Reward: c(types.USDXMintingRewardDenom, 0),
},
RewardIndexes: claimsRewardIndexes,
}
suite.storeClaim(claim)
globalIndexes := increaseRewardFactors(claimsRewardIndexes)
globalIndexes = append(globalIndexes, newRewardIndex)
suite.storeGlobalUSDXIndexes(globalIndexes)
cdp := NewCDPBuilder(claim.Owner, newRewardIndex.CollateralType).Build()
suite.keeper.SynchronizeUSDXMintingReward(suite.ctx, cdp)
syncedClaim, _ := suite.keeper.GetUSDXMintingClaim(suite.ctx, claim.Owner)
// Only the claim's index for `collateralType` should have been changed
expectedIndexes := claimsRewardIndexes.With(newRewardIndex.CollateralType, newRewardIndex.RewardFactor)
suite.Equal(expectedIndexes, syncedClaim.RewardIndexes)
}
func (suite *SynchronizeUSDXMintingRewardTests) TestClaimIsUnchangedWhenGlobalFactorMissing() {
claimsRewardIndexes := nonEmptyRewardIndexes
claim := types.USDXMintingClaim{
BaseClaim: types.BaseClaim{
Owner: arbitraryAddress(),
Reward: c(types.USDXMintingRewardDenom, 0),
},
RewardIndexes: claimsRewardIndexes,
}
suite.storeClaim(claim)
// don't store any reward indexes
// create a cdp with collateral type that doesn't exist in the claim's indexes, and does not have a corresponding global factor
cdp := NewCDPBuilder(claim.Owner, "unrewardedcollateral").WithPrincipal(i(1e12)).Build()
suite.keeper.SynchronizeUSDXMintingReward(suite.ctx, cdp)
syncedClaim, _ := suite.keeper.GetUSDXMintingClaim(suite.ctx, claim.Owner)
suite.Equal(claim.RewardIndexes, syncedClaim.RewardIndexes)
suite.Equal(claim.Reward, syncedClaim.Reward)
}
type cdpBuilder struct {
cdptypes.CDP
}
func NewCDPBuilder(owner sdk.AccAddress, collateralType string) cdpBuilder {
return cdpBuilder{
CDP: cdptypes.CDP{
Owner: owner,
Type: collateralType,
// The zero value of Principal and AccumulatedFees (type sdk.Coin) is invalid as the denom is ""
// Set them to the default denom, but with 0 amount.
Principal: c(cdptypes.DefaultStableDenom, 0),
AccumulatedFees: c(cdptypes.DefaultStableDenom, 0),
}}
}
func (builder cdpBuilder) Build() cdptypes.CDP { return builder.CDP }
func (builder cdpBuilder) WithPrincipal(principal sdk.Int) cdpBuilder {
builder.Principal = sdk.NewCoin(cdptypes.DefaultStableDenom, principal)
return builder
}
var nonEmptyRewardIndexes = types.RewardIndexes{
{
CollateralType: "bnb-a",
RewardFactor: d("0.1"),
},
{
CollateralType: "busd-b",
RewardFactor: d("0.4"),
},
}
func paramsWithSingleUSDXRewardPeriod(collateralType string) types.ParamSubspace {
return &fakeParamSubspace{
params: types.Params{
USDXMintingRewardPeriods: types.RewardPeriods{
{
CollateralType: collateralType,
},
},
},
}
}
func extractFirstCollateralType(indexes types.RewardIndexes) string {
if len(indexes) == 0 {
panic("cannot extract a collateral type from 0 length RewardIndexes")
}
return indexes[0].CollateralType
}