-
Notifications
You must be signed in to change notification settings - Fork 203
/
hooks.go
222 lines (190 loc) · 7.32 KB
/
hooks.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
package keeper
import (
"fmt"
"cosmossdk.io/math"
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
commontypes "github.com/lavanet/lava/common/types"
"github.com/lavanet/lava/utils"
"github.com/lavanet/lava/x/dualstaking/types"
"golang.org/x/exp/slices"
)
// Wrapper struct
type Hooks struct {
k Keeper
}
const PROVIDERS_NUM_GAS_REFUND = 50
var _ stakingtypes.StakingHooks = Hooks{}
// Create new dualstaking hooks
func (k Keeper) Hooks() *Hooks {
return &Hooks{k}
}
// initialize validator distribution record
func (h Hooks) AfterValidatorCreated(ctx sdk.Context, valAddr sdk.ValAddress) error {
return nil
}
// AfterValidatorRemoved performs clean up after a validator is removed
func (h Hooks) AfterValidatorRemoved(ctx sdk.Context, _ sdk.ConsAddress, valAddr sdk.ValAddress) error {
return nil
}
// increment period
func (h Hooks) BeforeDelegationCreated(ctx sdk.Context, delAddr sdk.AccAddress, valAddr sdk.ValAddress) error {
return nil
}
// withdraw delegation rewards (which also increments period)
func (h Hooks) BeforeDelegationSharesModified(ctx sdk.Context, delAddr sdk.AccAddress, valAddr sdk.ValAddress) error {
return nil
}
// create new delegation period record
// add description
func (h Hooks) AfterDelegationModified(ctx sdk.Context, delAddr sdk.AccAddress, valAddr sdk.ValAddress) error {
originalGas := ctx.GasMeter().GasConsumed()
providers := 0
defer func() {
endGas := ctx.GasMeter().GasConsumed()
if endGas > originalGas && providers < PROVIDERS_NUM_GAS_REFUND {
ctx.GasMeter().RefundGas(endGas-originalGas, "refund hooks gas")
}
}()
if h.k.GetDisableDualstakingHook(ctx) {
return nil
}
var diff math.Int
var err error
diff, providers, err = h.k.VerifyDelegatorBalance(ctx, delAddr)
if err != nil {
return err
}
// if diff is zero, do nothing, this is a redelegate
if diff.IsZero() {
return nil
} else if diff.IsPositive() {
// less provider delegations,a delegation operation was done, delegate to empty provider
err = h.k.delegate(ctx, delAddr.String(), types.EMPTY_PROVIDER, types.EMPTY_PROVIDER_CHAINID,
sdk.NewCoin(h.k.stakingKeeper.BondDenom(ctx), diff))
if err != nil {
return err
}
} else if diff.IsNegative() {
// more provider delegation, unbond operation was done, unbond from providers
err = h.k.UnbondUniformProviders(ctx, delAddr.String(), sdk.NewCoin(h.k.stakingKeeper.BondDenom(ctx), diff.Neg()))
if err != nil {
return err
}
}
diff, _, err = h.k.VerifyDelegatorBalance(ctx, delAddr)
if err != nil {
return err
}
// now it needs to be zero
if !diff.IsZero() {
return utils.LavaFormatError("validator and provider balances are not balanced", nil,
utils.Attribute{Key: "delegator", Value: delAddr.String()},
utils.Attribute{Key: "diff", Value: diff.String()},
)
}
return nil
}
// BeforeValidatorSlashed hook unbonds funds from providers so the providers-validators delegations balance will preserve
func (h Hooks) BeforeValidatorSlashed(ctx sdk.Context, valAddr sdk.ValAddress, fraction sdk.Dec) error {
val, found := h.k.stakingKeeper.GetValidator(ctx, valAddr)
if !found {
return utils.LavaFormatError("slash hook failed", fmt.Errorf("validator not found"),
utils.Attribute{Key: "validator_address", Value: valAddr.String()},
)
}
// unbond from providers according to slash
// sort the delegations from lowest to highest so if there's a remainder,
// remove it from the highest delegation in the last iteration
remainingTokensToSlash := fraction.MulInt(val.Tokens).TruncateInt()
delegations := h.k.stakingKeeper.GetValidatorDelegations(ctx, valAddr)
slices.SortFunc(delegations, func(i, j stakingtypes.Delegation) bool {
return val.TokensFromShares(i.Shares).LT(val.TokensFromShares(j.Shares))
})
for i, d := range delegations {
tokens := val.TokensFromShares(d.Shares)
tokensToSlash := fraction.Mul(tokens).TruncateInt()
if i == len(delegations)-1 {
tokensToSlash = remainingTokensToSlash
}
if tokensToSlash.IsPositive() {
err := h.k.UnbondUniformProviders(ctx, d.DelegatorAddress, sdk.NewCoin(commontypes.TokenDenom, tokensToSlash))
if err != nil {
utils.LavaFormatError("slash hook failed", err,
utils.Attribute{Key: "validator_address", Value: valAddr.String()},
utils.Attribute{Key: "delegator_address", Value: d.DelegatorAddress},
utils.Attribute{Key: "slash_amount", Value: tokensToSlash.String()},
)
}
remainingTokensToSlash = remainingTokensToSlash.Sub(tokensToSlash)
}
}
details := make(map[string]string)
details["validator_address"] = valAddr.String()
details["slash_fraction"] = fraction.String()
utils.LogLavaEvent(ctx, h.k.Logger(ctx), types.ValidatorSlashEventName, details, "Validator slash hook event")
return nil
}
func (h Hooks) BeforeValidatorModified(_ sdk.Context, _ sdk.ValAddress) error {
return nil
}
func (h Hooks) AfterValidatorBonded(_ sdk.Context, _ sdk.ConsAddress, _ sdk.ValAddress) error {
return nil
}
func (h Hooks) AfterValidatorBeginUnbonding(_ sdk.Context, _ sdk.ConsAddress, _ sdk.ValAddress) error {
return nil
}
func (h Hooks) BeforeDelegationRemoved(ctx sdk.Context, delAddr sdk.AccAddress, valAddr sdk.ValAddress) error {
if h.k.GetDisableDualstakingHook(ctx) {
return nil
}
delegation, found := h.k.stakingKeeper.GetDelegation(ctx, delAddr, valAddr)
if !found {
return fmt.Errorf("could not find delegation for dualstaking hook")
}
validator, err := h.k.stakingKeeper.GetDelegatorValidator(ctx, delAddr, valAddr)
if err != nil {
return utils.LavaFormatWarning("delegation removed hook failed", err,
utils.LogAttr("validator_address", valAddr.String()),
utils.LogAttr("delegator_address", delAddr.String()),
)
}
amount := validator.TokensFromSharesRoundUp(delegation.Shares).Ceil().TruncateInt()
err = h.k.UnbondUniformProviders(ctx, delAddr.String(), sdk.NewCoin(h.k.stakingKeeper.BondDenom(ctx), amount))
if err != nil {
return utils.LavaFormatError("delegation removed hook failed", err,
utils.Attribute{Key: "validator_address", Value: valAddr.String()},
utils.Attribute{Key: "delegator_address", Value: delAddr.String()},
utils.Attribute{Key: "amount", Value: amount.String()},
)
}
return nil
}
func (h Hooks) AfterUnbondingInitiated(_ sdk.Context, _ uint64) error {
return nil
}
// DisableDualstakingHook : dualstaking uses hooks to catch delegations/unbonding tx's to do the same action on the providers delegations.
// in the case of redelegation, since the user doesnt put/takes tokens back we dont want to take action in the providers delegations.
// this flag is a local flag used to mark the next hooks to do nothing since this was cause by redelegation tx (redelegation = delegation + unbond)
// SetDisableDualstakingHook set disableDualstakingHook in the store
func (k Keeper) SetDisableDualstakingHook(ctx sdk.Context, val bool) {
store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.DisableDualstakingHookPrefix))
b := []byte{0}
if val {
b = []byte{1}
}
store.Set([]byte{0}, b)
}
// GetDisableDualstakingHook returns disableDualstakingHook
func (k Keeper) GetDisableDualstakingHook(ctx sdk.Context) bool {
if k.storeKey == nil {
return false
}
store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.DisableDualstakingHookPrefix))
b := store.Get([]byte{0})
if b == nil {
return false
}
return b[0] != 0
}