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// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package evm
import (
"fmt"
"github.com/ava-labs/go-ethereum/core/types"
"github.com/ava-labs/go-ethereum/rlp"
"github.com/ava-labs/gecko/ids"
"github.com/ava-labs/gecko/snow/choices"
"github.com/ava-labs/gecko/snow/consensus/snowman"
"github.com/ava-labs/gecko/vms/components/missing"
)
// Block implements the snowman.Block interface
type Block struct {
id ids.ID
ethBlock *types.Block
vm *VM
}
// ID implements the snowman.Block interface
func (b *Block) ID() ids.ID { return b.id }
// Accept implements the snowman.Block interface
func (b *Block) Accept() error {
b.vm.ctx.Log.Verbo("Block %s is accepted", b.ID())
b.vm.updateStatus(b.ID(), choices.Accepted)
return nil
}
// Reject implements the snowman.Block interface
func (b *Block) Reject() error {
b.vm.ctx.Log.Verbo("Block %s is rejected", b.ID())
b.vm.updateStatus(b.ID(), choices.Rejected)
return nil
}
// Status implements the snowman.Block interface
func (b *Block) Status() choices.Status {
status := b.vm.getCachedStatus(b.ID())
if status == choices.Unknown && b.ethBlock != nil {
return choices.Processing
}
return status
}
// Parent implements the snowman.Block interface
func (b *Block) Parent() snowman.Block {
parentID := ids.NewID(b.ethBlock.ParentHash())
if block := b.vm.getBlock(parentID); block != nil {
b.vm.ctx.Log.Verbo("Parent(%s) has status: %s", parentID, block.Status())
return block
}
b.vm.ctx.Log.Verbo("Parent(%s) has status: %s", parentID, choices.Unknown)
return &missing.Block{BlkID: parentID}
}
// Verify implements the snowman.Block interface
func (b *Block) Verify() error {
_, err := b.vm.chain.InsertChain([]*types.Block{b.ethBlock})
return err
}
// Bytes implements the snowman.Block interface
func (b *Block) Bytes() []byte {
res, err := rlp.EncodeToBytes(b.ethBlock)
if err != nil {
panic(err)
}
return res
}
func (b *Block) String() string { return fmt.Sprintf("EVM block, ID = %s", b.ID()) }
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