104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
package assoc
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import (
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"bytes"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/wire"
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)
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// ValidatorSet defines
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type ValidatorSet struct {
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sdk.ValidatorSet
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store sdk.KVStore
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cdc *wire.Codec
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maxAssoc int
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addrLen int
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}
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var _ sdk.ValidatorSet = ValidatorSet{}
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// NewValidatorSet returns new ValidatorSet with underlying ValidatorSet
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func NewValidatorSet(cdc *wire.Codec, store sdk.KVStore, valset sdk.ValidatorSet, maxAssoc int, addrLen int) ValidatorSet {
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if maxAssoc < 0 || addrLen < 0 {
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panic("Cannot use negative integer for NewValidatorSet")
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}
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return ValidatorSet{
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ValidatorSet: valset,
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store: store,
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cdc: cdc,
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maxAssoc: maxAssoc,
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addrLen: addrLen,
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}
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}
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// Implements sdk.ValidatorSet
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func (valset ValidatorSet) Validator(ctx sdk.Context, addr sdk.AccAddress) (res sdk.Validator) {
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base := valset.store.Get(GetBaseKey(addr))
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res = valset.ValidatorSet.Validator(ctx, base)
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if res == nil {
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res = valset.ValidatorSet.Validator(ctx, addr)
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}
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return
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}
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// GetBaseKey :: sdk.AccAddress -> sdk.AccAddress
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func GetBaseKey(addr sdk.AccAddress) []byte {
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return append([]byte{0x00}, addr...)
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}
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// GetAssocPrefix :: sdk.AccAddress -> (sdk.AccAddress -> byte)
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func GetAssocPrefix(base sdk.AccAddress) []byte {
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return append([]byte{0x01}, base...)
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}
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// GetAssocKey :: (sdk.AccAddress, sdk.AccAddress) -> byte
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func GetAssocKey(base sdk.AccAddress, assoc sdk.AccAddress) []byte {
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return append(append([]byte{0x01}, base...), assoc...)
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}
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// Associate associates new address with validator address
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func (valset ValidatorSet) Associate(ctx sdk.Context, base sdk.AccAddress, assoc sdk.AccAddress) bool {
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if len(base) != valset.addrLen || len(assoc) != valset.addrLen {
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return false
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}
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// If someone already owns the associated address
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if valset.store.Get(GetBaseKey(assoc)) != nil {
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return false
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}
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valset.store.Set(GetBaseKey(assoc), base)
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valset.store.Set(GetAssocKey(base, assoc), []byte{0x00})
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return true
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}
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// Dissociate removes association between addresses
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func (valset ValidatorSet) Dissociate(ctx sdk.Context, base sdk.AccAddress, assoc sdk.AccAddress) bool {
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if len(base) != valset.addrLen || len(assoc) != valset.addrLen {
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return false
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}
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// No associated address found for given validator
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if !bytes.Equal(valset.store.Get(GetBaseKey(assoc)), base) {
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return false
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}
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valset.store.Delete(GetBaseKey(assoc))
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valset.store.Delete(GetAssocKey(base, assoc))
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return true
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}
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// Associations returns all associated addresses with a validator
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func (valset ValidatorSet) Associations(ctx sdk.Context, base sdk.AccAddress) (res []sdk.AccAddress) {
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res = make([]sdk.AccAddress, valset.maxAssoc)
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iter := sdk.KVStorePrefixIterator(valset.store, GetAssocPrefix(base))
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i := 0
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for ; iter.Valid(); iter.Next() {
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key := iter.Key()
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res[i] = key[len(key)-valset.addrLen:]
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i++
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}
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return res[:i]
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}
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