70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
package keeper // noalias
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import (
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"bytes"
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"math/rand"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/staking/types"
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)
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// does a certain by-power index record exist
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func ValidatorByPowerIndexExists(ctx sdk.Context, keeper Keeper, power []byte) bool {
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store := ctx.KVStore(keeper.storeKey)
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return store.Has(power)
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}
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// update validator for testing
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func TestingUpdateValidator(keeper Keeper, ctx sdk.Context, validator types.Validator, apply bool) types.Validator {
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keeper.SetValidator(ctx, validator)
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// Remove any existing power key for validator.
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store := ctx.KVStore(keeper.storeKey)
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deleted := false
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iterator := sdk.KVStorePrefixIterator(store, types.ValidatorsByPowerIndexKey)
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defer iterator.Close()
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for ; iterator.Valid(); iterator.Next() {
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valAddr := types.ParseValidatorPowerRankKey(iterator.Key())
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if bytes.Equal(valAddr, validator.GetOperator()) {
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if deleted {
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panic("found duplicate power index key")
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} else {
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deleted = true
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}
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store.Delete(iterator.Key())
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}
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}
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keeper.SetValidatorByPowerIndex(ctx, validator)
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if !apply {
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ctx, _ = ctx.CacheContext()
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}
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_, err := keeper.ApplyAndReturnValidatorSetUpdates(ctx)
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if err != nil {
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panic(err)
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}
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validator, found := keeper.GetValidator(ctx, validator.GetOperator())
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if !found {
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panic("validator expected but not found")
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}
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return validator
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}
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// RandomValidator returns a random validator given access to the keeper and ctx
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func RandomValidator(r *rand.Rand, keeper Keeper, ctx sdk.Context) (val types.Validator, ok bool) {
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vals := keeper.GetAllValidators(ctx)
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if len(vals) == 0 {
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return types.Validator{}, false
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}
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i := r.Intn(len(vals))
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return vals[i], true
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}
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