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provider.go
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provider.go
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// Package v0_15_0
// nolint revive
package v0_15_0
import (
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/address"
sdkmodule "github.com/cosmos/cosmos-sdk/types/module"
utypes "github.com/akash-network/node/upgrades/types"
)
type providerMigrations struct {
utypes.Migrator
}
func newProviderMigration(m utypes.Migrator) utypes.Migration {
return providerMigrations{Migrator: m}
}
func (m providerMigrations) GetHandler() sdkmodule.MigrationHandler {
return m.handler
}
// handler migrates provider from version 1 to 2.
func (m providerMigrations) handler(ctx sdk.Context) error {
store := ctx.KVStore(m.StoreKey())
// old key is of format:
// ownerAddrBytes (20 bytes)
// new key is of format
// ownerAddrLen (1 byte) || ownerAddrBytes
oldStoreIter := store.Iterator(nil, nil)
defer func() {
_ = oldStoreIter.Close()
}()
for ; oldStoreIter.Valid(); oldStoreIter.Next() {
newStoreKey := address.MustLengthPrefix(oldStoreIter.Key())
// Set new key on store. Values don't change.
store.Set(newStoreKey, oldStoreIter.Value())
store.Delete(oldStoreIter.Key())
}
return nil
}