135 lines
4.9 KiB
Go
135 lines
4.9 KiB
Go
package stake
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import (
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"testing"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestGetInflation(t *testing.T) {
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ctx, _, keeper := createTestInput(t, false, 0)
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pool := keeper.GetPool(ctx)
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params := keeper.GetParams(ctx)
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hrsPerYrRat := sdk.NewRat(hrsPerYr)
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// Governing Mechanism:
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// bondedRatio = BondedPool / TotalSupply
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// inflationRateChangePerYear = (1- bondedRatio/ GoalBonded) * MaxInflationRateChange
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tests := []struct {
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name string
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setBondedPool, setTotalSupply int64
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setInflation, expectedChange sdk.Rat
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}{
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// with 0% bonded atom supply the inflation should increase by InflationRateChange
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{"test 1", 0, 0, sdk.NewRat(7, 100), params.InflationRateChange.Quo(hrsPerYrRat).Round(precision)},
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// 100% bonded, starting at 20% inflation and being reduced
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// (1 - (1/0.67))*(0.13/8667)
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{"test 2", 1, 1, sdk.NewRat(20, 100),
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sdk.OneRat.Sub(sdk.OneRat.Quo(params.GoalBonded)).Mul(params.InflationRateChange).Quo(hrsPerYrRat).Round(precision)},
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// 50% bonded, starting at 10% inflation and being increased
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{"test 3", 1, 2, sdk.NewRat(10, 100),
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sdk.OneRat.Sub(sdk.NewRat(1, 2).Quo(params.GoalBonded)).Mul(params.InflationRateChange).Quo(hrsPerYrRat).Round(precision)},
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// test 7% minimum stop (testing with 100% bonded)
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{"test 4", 1, 1, sdk.NewRat(7, 100), sdk.ZeroRat},
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{"test 5", 1, 1, sdk.NewRat(70001, 1000000), sdk.NewRat(-1, 1000000).Round(precision)},
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// test 20% maximum stop (testing with 0% bonded)
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{"test 6", 0, 0, sdk.NewRat(20, 100), sdk.ZeroRat},
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{"test 7", 0, 0, sdk.NewRat(199999, 1000000), sdk.NewRat(1, 1000000).Round(precision)},
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// perfect balance shouldn't change inflation
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{"test 8", 67, 100, sdk.NewRat(15, 100), sdk.ZeroRat},
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}
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for _, tc := range tests {
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pool.BondedPool, pool.TotalSupply = tc.setBondedPool, tc.setTotalSupply
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pool.Inflation = tc.setInflation
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keeper.setPool(ctx, pool)
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inflation := keeper.nextInflation(ctx)
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diffInflation := inflation.Sub(tc.setInflation)
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assert.True(t, diffInflation.Equal(tc.expectedChange),
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"Name: %v\nDiff: %v\nExpected: %v\n", tc.name, diffInflation, tc.expectedChange)
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}
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}
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func TestProcessProvisions(t *testing.T) {
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ctx, _, keeper := createTestInput(t, false, 0)
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params := defaultParams()
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keeper.setParams(ctx, params)
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pool := keeper.GetPool(ctx)
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// create some candidates some bonded, some unbonded
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candidates := make([]Candidate, 10)
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for i := 0; i < 10; i++ {
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c := Candidate{
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Status: Unbonded,
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PubKey: pks[i],
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Address: addrs[i],
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Assets: sdk.NewRat(0),
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Liabilities: sdk.NewRat(0),
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}
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if i < 5 {
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c.Status = Bonded
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}
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mintedTokens := int64((i + 1) * 10000000)
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pool.TotalSupply += mintedTokens
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pool, c, _ = pool.candidateAddTokens(c, mintedTokens)
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keeper.setCandidate(ctx, c)
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candidates[i] = c
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}
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keeper.setPool(ctx, pool)
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var totalSupply int64 = 550000000
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var bondedShares int64 = 150000000
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var unbondedShares int64 = 400000000
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assert.Equal(t, totalSupply, pool.TotalSupply)
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assert.Equal(t, bondedShares, pool.BondedPool)
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assert.Equal(t, unbondedShares, pool.UnbondedPool)
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// initial bonded ratio ~ 27%
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assert.True(t, pool.bondedRatio().Equal(sdk.NewRat(bondedShares, totalSupply)), "%v", pool.bondedRatio())
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// test the value of candidate shares
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assert.True(t, pool.bondedShareExRate().Equal(sdk.OneRat), "%v", pool.bondedShareExRate())
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initialSupply := pool.TotalSupply
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initialUnbonded := pool.TotalSupply - pool.BondedPool
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// process the provisions a year
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for hr := 0; hr < 8766; hr++ {
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pool := keeper.GetPool(ctx)
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expInflation := keeper.nextInflation(ctx).Round(1000000000)
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expProvisions := (expInflation.Mul(sdk.NewRat(pool.TotalSupply)).Quo(hrsPerYrRat)).Evaluate()
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startBondedPool := pool.BondedPool
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startTotalSupply := pool.TotalSupply
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pool = keeper.processProvisions(ctx)
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keeper.setPool(ctx, pool)
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//fmt.Printf("hr %v, startBondedPool %v, expProvisions %v, pool.BondedPool %v\n", hr, startBondedPool, expProvisions, pool.BondedPool)
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require.Equal(t, startBondedPool+expProvisions, pool.BondedPool, "hr %v", hr)
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require.Equal(t, startTotalSupply+expProvisions, pool.TotalSupply)
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}
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pool = keeper.GetPool(ctx)
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assert.NotEqual(t, initialSupply, pool.TotalSupply)
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assert.Equal(t, initialUnbonded, pool.UnbondedPool)
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//panic(fmt.Sprintf("debug total %v, bonded %v, diff %v\n", p.TotalSupply, p.BondedPool, pool.TotalSupply-pool.BondedPool))
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// initial bonded ratio ~ from 27% to 40% increase for bonded holders ownership of total supply
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assert.True(t, pool.bondedRatio().Equal(sdk.NewRat(271734723, 671734723)), "%v", pool.bondedRatio())
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// global supply
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assert.Equal(t, int64(671734723), pool.TotalSupply)
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assert.Equal(t, int64(271734723), pool.BondedPool)
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assert.Equal(t, unbondedShares, pool.UnbondedPool)
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// test the value of candidate shares
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assert.True(t, pool.bondedShareExRate().Mul(sdk.NewRat(bondedShares)).Equal(sdk.NewRat(271734723)), "%v", pool.bondedShareExRate())
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}
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