Merge pull request #5 from ava-labs/revert-4-revert-2-plugin

Added the EVM as a plugin

1 files changed, 75 insertions, 0 deletions

diff --git a/plugin/evm/block.go b/plugin/evm/block.go
new file mode 100644
index 0000000..ec47490
--- /dev/null
+++ b/plugin/evm/block.go
@@ -0,0 +1,75 @@
+// (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"
+)
+
+// 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() {
+	b.vm.ctx.Log.Verbo("Block %s is accepted", b.ID())
+	b.vm.updateStatus(b.ID(), choices.Accepted)
+}
+
+// Reject implements the snowman.Block interface
+func (b *Block) Reject() {
+	b.vm.ctx.Log.Verbo("Block %s is rejected", b.ID())
+	b.vm.updateStatus(b.ID(), choices.Rejected)
+}
+
+// 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())
+	block := &Block{
+		id:       parentID,
+		ethBlock: b.vm.getCachedBlock(parentID),
+		vm:       b.vm,
+	}
+	b.vm.ctx.Log.Verbo("Parent(%s) has status: %s", block.ID(), block.Status())
+	return block
+}
+
+// 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()) }