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perf: modify DelegatorSharesInvariant for better performance (backport #12170) #12178

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Jun 7, 2022
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perf: modify DelegatorSharesInvariant for better performance (backport #12170) #12178

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26 changes: 18 additions & 8 deletions x/staking/keeper/invariants.go
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Original file line number Diff line number Diff line change
Expand Up @@ -164,20 +164,30 @@ func DelegatorSharesInvariant(k Keeper) sdk.Invariant {
)

validators := k.GetAllValidators(ctx)
validatorsDelegationShares := map[string]sdk.Dec{}

// initialize a map: validator -> its delegation shares
for _, validator := range validators {
valTotalDelShares := validator.GetDelegatorShares()
totalDelShares := sdk.ZeroDec()
validatorsDelegationShares[validator.GetOperator().String()] = sdk.ZeroDec()
}

delegations := k.GetValidatorDelegations(ctx, validator.GetOperator())
for _, delegation := range delegations {
totalDelShares = totalDelShares.Add(delegation.Shares)
}
// iterate through all the delegations to calculate the total delegation shares for each validator
delegations := k.GetAllDelegations(ctx)
for _, delegation := range delegations {
delegationValidatorAddr := delegation.GetValidatorAddr().String()
validatorDelegationShares := validatorsDelegationShares[delegationValidatorAddr]
validatorsDelegationShares[delegationValidatorAddr] = validatorDelegationShares.Add(delegation.Shares)
}

if !valTotalDelShares.Equal(totalDelShares) {
// for each validator, check if its total delegation shares calculated from the step above equals to its expected delegation shares
for _, validator := range validators {
expValTotalDelShares := validator.GetDelegatorShares()
calculatedValTotalDelShares := validatorsDelegationShares[validator.GetOperator().String()]
if !calculatedValTotalDelShares.Equal(expValTotalDelShares) {
broken = true
msg += fmt.Sprintf("broken delegator shares invariance:\n"+
"\tvalidator.DelegatorShares: %v\n"+
"\tsum of Delegator.Shares: %v\n", valTotalDelShares, totalDelShares)
"\tsum of Delegator.Shares: %v\n", expValTotalDelShares, calculatedValTotalDelShares)
}
}

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