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manager.go
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manager.go
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// Copyright (C) 2019-2024, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package executor
import (
"errors"
"github.com/MetalBlockchain/metalgo/ids"
"github.com/MetalBlockchain/metalgo/snow/consensus/snowman"
"github.com/MetalBlockchain/metalgo/utils/set"
"github.com/MetalBlockchain/metalgo/vms/platformvm/block"
"github.com/MetalBlockchain/metalgo/vms/platformvm/metrics"
"github.com/MetalBlockchain/metalgo/vms/platformvm/state"
"github.com/MetalBlockchain/metalgo/vms/platformvm/txs"
"github.com/MetalBlockchain/metalgo/vms/platformvm/txs/executor"
"github.com/MetalBlockchain/metalgo/vms/platformvm/txs/mempool"
"github.com/MetalBlockchain/metalgo/vms/platformvm/validators"
)
var (
_ Manager = (*manager)(nil)
ErrChainNotSynced = errors.New("chain not synced")
)
type Manager interface {
state.Versions
// Returns the ID of the most recently accepted block.
LastAccepted() ids.ID
SetPreference(blkID ids.ID) (updated bool)
Preferred() ids.ID
GetBlock(blkID ids.ID) (snowman.Block, error)
GetStatelessBlock(blkID ids.ID) (block.Block, error)
NewBlock(block.Block) snowman.Block
// VerifyTx verifies that the transaction can be issued based on the currently
// preferred state. This should *not* be used to verify transactions in a block.
VerifyTx(tx *txs.Tx) error
// VerifyUniqueInputs verifies that the inputs are not duplicated in the
// provided blk or any of its ancestors pinned in memory.
VerifyUniqueInputs(blkID ids.ID, inputs set.Set[ids.ID]) error
}
func NewManager(
mempool mempool.Mempool,
metrics metrics.Metrics,
s state.State,
txExecutorBackend *executor.Backend,
validatorManager validators.Manager,
) Manager {
lastAccepted := s.GetLastAccepted()
backend := &backend{
Mempool: mempool,
lastAccepted: lastAccepted,
state: s,
ctx: txExecutorBackend.Ctx,
blkIDToState: map[ids.ID]*blockState{},
}
return &manager{
backend: backend,
verifier: &verifier{
backend: backend,
txExecutorBackend: txExecutorBackend,
},
acceptor: &acceptor{
backend: backend,
metrics: metrics,
validators: validatorManager,
bootstrapped: txExecutorBackend.Bootstrapped,
},
rejector: &rejector{
backend: backend,
addTxsToMempool: !txExecutorBackend.Config.PartialSyncPrimaryNetwork,
},
preferred: lastAccepted,
txExecutorBackend: txExecutorBackend,
}
}
type manager struct {
*backend
verifier block.Visitor
acceptor block.Visitor
rejector block.Visitor
preferred ids.ID
txExecutorBackend *executor.Backend
}
func (m *manager) GetBlock(blkID ids.ID) (snowman.Block, error) {
blk, err := m.backend.GetBlock(blkID)
if err != nil {
return nil, err
}
return m.NewBlock(blk), nil
}
func (m *manager) GetStatelessBlock(blkID ids.ID) (block.Block, error) {
return m.backend.GetBlock(blkID)
}
func (m *manager) NewBlock(blk block.Block) snowman.Block {
return &Block{
manager: m,
Block: blk,
}
}
func (m *manager) SetPreference(blkID ids.ID) bool {
updated := m.preferred != blkID
m.preferred = blkID
return updated
}
func (m *manager) Preferred() ids.ID {
return m.preferred
}
func (m *manager) VerifyTx(tx *txs.Tx) error {
if !m.txExecutorBackend.Bootstrapped.Get() {
return ErrChainNotSynced
}
stateDiff, err := state.NewDiff(m.preferred, m)
if err != nil {
return err
}
nextBlkTime, _, err := executor.NextBlockTime(stateDiff, m.txExecutorBackend.Clk)
if err != nil {
return err
}
_, err = executor.AdvanceTimeTo(m.txExecutorBackend, stateDiff, nextBlkTime)
if err != nil {
return err
}
return tx.Unsigned.Visit(&executor.StandardTxExecutor{
Backend: m.txExecutorBackend,
State: stateDiff,
Tx: tx,
})
}
func (m *manager) VerifyUniqueInputs(blkID ids.ID, inputs set.Set[ids.ID]) error {
return m.backend.verifyUniqueInputs(blkID, inputs)
}