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vm.go
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vm.go
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// Copyright (C) 2019-2023, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package vertex
import (
"context"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/snow/consensus/snowstorm"
"github.com/ava-labs/avalanchego/snow/engine/common"
"github.com/ava-labs/avalanchego/snow/engine/snowman/block"
)
type LinearizableVMWithEngine interface {
DAGVM
// Linearize is called after [Initialize] and after the DAG has been
// finalized. After Linearize is called:
//
// - PendingTxs will never be called again
// - GetTx will never be called again
// - ParseTx may still be called
// - All the block based functions of the [block.ChainVM] must work as
// expected.
//
// Linearize is part of the VM initialization, and will be called at most
// once per VM instantiation. This means that Linearize should be called
// every time the chain restarts after the DAG has finalized.
Linearize(
ctx context.Context,
stopVertexID ids.ID,
toEngine chan<- common.Message,
) error
}
type LinearizableVM interface {
DAGVM
// Linearize is called after [Initialize] and after the DAG has been
// finalized. After Linearize is called:
//
// - PendingTxs will never be called again
// - GetTx will never be called again
// - ParseTx may still be called
// - All the block based functions of the [block.ChainVM] must work as
// expected.
//
// Linearize is part of the VM initialization, and will be called at most
// once per VM instantiation. This means that Linearize should be called
// every time the chain restarts after the DAG has finalized.
Linearize(ctx context.Context, stopVertexID ids.ID) error
}
// DAGVM defines the minimum functionality that an avalanche VM must
// implement
type DAGVM interface {
block.ChainVM
// Convert a stream of bytes to a transaction or return an error
ParseTx(ctx context.Context, txBytes []byte) (snowstorm.Tx, error)
}