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key.go
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key.go
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package types
import (
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/address"
)
const (
// ModuleName defines the module name
ModuleName = "bank"
// StoreKey defines the primary module store key
StoreKey = ModuleName
// RouterKey defines the module's message routing key
RouterKey = ModuleName
// QuerierRoute defines the module's query routing key
QuerierRoute = ModuleName
)
// KVStore keys
var (
// BalancesPrefix is the prefix for the account balances store. We use a byte
// (instead of `[]byte("balances")` to save some disk space).
BalancesPrefix = []byte{0x02}
SupplyKey = []byte{0x00}
DenomMetadataPrefix = []byte{0x1}
)
// DenomMetadataKey returns the denomination metadata key.
func DenomMetadataKey(denom string) []byte {
d := []byte(denom)
return append(DenomMetadataPrefix, d...)
}
// AddressFromBalancesStore returns an account address from a balances prefix
// store. The key must not contain the prefix BalancesPrefix as the prefix store
// iterator discards the actual prefix.
//
// If invalid key is passed, AddressFromBalancesStore returns ErrInvalidKey.
func AddressFromBalancesStore(key []byte) (sdk.AccAddress, error) {
if len(key) == 0 {
return nil, ErrInvalidKey
}
addrLen := key[0]
bound := int(addrLen)
if len(key)-1 < bound {
return nil, ErrInvalidKey
}
return key[1 : bound+1], nil
}
// CreateAccountBalancesPrefix creates the prefix for an account's balances.
func CreateAccountBalancesPrefix(addr []byte) []byte {
return append(BalancesPrefix, address.MustLengthPrefix(addr)...)
}
<<<<<<< HEAD
=======
// CreateDenomAddressPrefix creates a prefix for a reverse index of denomination
// to account balance for that denomination.
func CreateDenomAddressPrefix(denom string) []byte {
// we add a "zero" byte at the end - null byte terminator, to allow prefix denom prefix
// scan. Setting it is not needed (key[last] = 0) - because this is the default.
key := make([]byte, len(DenomAddressPrefix)+len(denom)+1)
copy(key, DenomAddressPrefix)
copy(key[len(DenomAddressPrefix):], denom)
return key
}
>>>>>>> 16a953cc9 (fix: x/bank/044 migrateDenomMetadata (#10239))