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state.go
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state.go
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// Copyright (C) 2019-2024, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package validators
import (
"context"
"sync"
"github.com/ava-labs/avalanchego/ids"
)
var _ State = (*lockedState)(nil)
// State allows the lookup of validator sets on specified subnets at the
// requested P-chain height.
type State interface {
// GetMinimumHeight returns the minimum height of the block still in the
// proposal window.
GetMinimumHeight(context.Context) (uint64, error)
// GetCurrentHeight returns the current height of the P-chain.
GetCurrentHeight(context.Context) (uint64, error)
// GetSubnetID returns the subnetID of the provided chain.
GetSubnetID(ctx context.Context, chainID ids.ID) (ids.ID, error)
// GetValidatorSet returns the validators of the provided subnet at the
// requested P-chain height.
// The returned map should not be modified.
GetValidatorSet(
ctx context.Context,
height uint64,
subnetID ids.ID,
) (map[ids.NodeID]*GetValidatorOutput, error)
}
type lockedState struct {
lock sync.Locker
s State
}
func NewLockedState(lock sync.Locker, s State) State {
return &lockedState{
lock: lock,
s: s,
}
}
func (s *lockedState) GetMinimumHeight(ctx context.Context) (uint64, error) {
s.lock.Lock()
defer s.lock.Unlock()
return s.s.GetMinimumHeight(ctx)
}
func (s *lockedState) GetCurrentHeight(ctx context.Context) (uint64, error) {
s.lock.Lock()
defer s.lock.Unlock()
return s.s.GetCurrentHeight(ctx)
}
func (s *lockedState) GetSubnetID(ctx context.Context, chainID ids.ID) (ids.ID, error) {
s.lock.Lock()
defer s.lock.Unlock()
return s.s.GetSubnetID(ctx, chainID)
}
func (s *lockedState) GetValidatorSet(
ctx context.Context,
height uint64,
subnetID ids.ID,
) (map[ids.NodeID]*GetValidatorOutput, error) {
s.lock.Lock()
defer s.lock.Unlock()
return s.s.GetValidatorSet(ctx, height, subnetID)
}
type noValidators struct {
State
}
func NewNoValidatorsState(state State) State {
return &noValidators{
State: state,
}
}
func (*noValidators) GetValidatorSet(context.Context, uint64, ids.ID) (map[ids.NodeID]*GetValidatorOutput, error) {
return nil, nil
}