chore(core/types): remove block.go and import Block and Body from libevm

- `BlockGasCost` getter pure function
- New import from libevm's `core/types`: `Block`, `Blocks`, `Body`, `CalcUncleHash`, `NewBlock` and `NewBlockWithHeader`
- remove now unneeded `core/types/block.go`

See original PR ava-labs/coreth#760

Signed-off-by: Quentin McGaw <[email protected]>
Co-authored-by: Arran Schlosberg <[email protected]>

Author: qdm12

cmd/evm/internal/t8ntool/block.go

@@ -166,7 +166,10 @@ func (i *bbInput) ToBlock() *types.Block {
 	if i.Header.Difficulty != nil {
 		header.Difficulty = i.Header.Difficulty
 	}
-	return types.NewBlockWithHeader(header).WithBody(i.Txs, i.Ommers)
+	return types.NewBlockWithHeader(header).WithBody(types.Body{
+		Transactions: i.Txs,
+		Uncles:       i.Ommers,
+	})
 }
 
 // SealBlock seals the given block using the configured engine.

consensus/dummy/consensus.go

@@ -337,7 +337,7 @@ func (eng *DummyEngine) Finalize(chain consensus.ChainHeaderReader, block *types
 		return err
 	}
 	// Verify the BlockGasCost set in the header matches the expected value.
-	blockGasCost := block.BlockGasCost()
+	blockGasCost := types.BlockGasCost(block)
 	expectedBlockGasCost := customheader.BlockGasCost(
 		config,
 		feeConfig,

core/blockchain.go

@@ -1428,7 +1428,7 @@ func (bc *BlockChain) insertBlock(block *types.Block, writes bool) error {
 		"parentHash", block.ParentHash(),
 		"uncles", len(block.Uncles()), "txs", len(block.Transactions()), "gas", block.GasUsed(),
 		"elapsed", common.PrettyDuration(time.Since(start)),
-		"root", block.Root(), "baseFeePerGas", block.BaseFee(), "blockGasCost", block.BlockGasCost(),
+		"root", block.Root(), "baseFeePerGas", block.BaseFee(), "blockGasCost", types.BlockGasCost(block),
 	)
 
 	processedBlockGasUsedCounter.Inc(int64(block.GasUsed()))

core/rawdb/accessors_chain.go

@@ -522,7 +522,7 @@ func ReadBlock(db ethdb.Reader, hash common.Hash, number uint64) *types.Block {
 	if body == nil {
 		return nil
 	}
-	return types.NewBlockWithHeader(header).WithBody(body.Transactions, body.Uncles)
+	return types.NewBlockWithHeader(header).WithBody(*body)
 }
 
 // WriteBlock serializes a block into the database, header and body separately.

core/types/block.go

@@ -0,0 +1,16 @@
+// (c) 2024, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
+package types
+
+import (
+	"math/big"
+)
+
+func BlockGasCost(b *Block) *big.Int {
+	cost := GetHeaderExtra(b.Header()).BlockGasCost
+	if cost == nil {
+		return nil
+	}
+	return new(big.Int).Set(cost)
+}

core/types/block_ext.go

@@ -68,7 +68,7 @@ func TestBlockEncoding(t *testing.T) {
 	check("MixDigest", block.MixDigest(), common.HexToHash("0xbd4472abb6659ebe3ee06ee4d7b72a00a9f4d001caca51342001075469aff498"))
 	check("Nonce", block.Nonce(), uint64(11617697748499542468))
 	check("BaseFee", block.BaseFee(), (*big.Int)(nil))
-	check("BlockGasCost", block.BlockGasCost(), (*big.Int)(nil))
+	check("BlockGasCost", BlockGasCost(&block), (*big.Int)(nil))
 
 	check("Size", block.Size(), uint64(len(blockEnc)))
 	check("BlockHash", block.Hash(), common.HexToHash("0x0a5843ac1cb04865017cb35a57b50b07084e5fcee39b5acadade33149f4fff9e"))
@@ -109,7 +109,7 @@ func TestEIP1559BlockEncoding(t *testing.T) {
 	check("Time", block.Time(), uint64(1426516743))
 	check("Size", block.Size(), uint64(len(blockEnc)))
 	check("BaseFee", block.BaseFee(), new(big.Int).SetUint64(1000000000))
-	check("BlockGasCost", block.BlockGasCost(), (*big.Int)(nil))
+	check("BlockGasCost", BlockGasCost(&block), (*big.Int)(nil))
 
 	tx1 := NewTransaction(0, common.HexToAddress("095e7baea6a6c7c4c2dfeb977efac326af552d87"), big.NewInt(10), 50000, big.NewInt(10), nil)
 	tx1, _ = tx1.WithSignature(HomesteadSigner{}, common.Hex2Bytes("9bea4c4daac7c7c52e093e6a4c35dbbcf8856f1af7b059ba20253e70848d094f8a8fae537ce25ed8cb5af9adac3f141af69bd515bd2ba031522df09b97dd72b100"))
@@ -173,7 +173,7 @@ func TestEIP2718BlockEncoding(t *testing.T) {
 	check("Time", block.Time(), uint64(1426516743))
 	check("Size", block.Size(), uint64(len(blockEnc)))
 	check("BaseFee", block.BaseFee(), (*big.Int)(nil))
-	check("BlockGasCost", block.BlockGasCost(), (*big.Int)(nil))
+	check("BlockGasCost", BlockGasCost(&block), (*big.Int)(nil))
 
 	// Create legacy tx.
 	to := common.HexToAddress("095e7baea6a6c7c4c2dfeb977efac326af552d87")
@@ -303,7 +303,7 @@ func TestSubnetEVMBlockEncoding(t *testing.T) {
 	check("Time", block.Time(), uint64(1426516743))
 	check("Size", block.Size(), uint64(len(blockEnc)))
 	check("BaseFee", block.BaseFee(), big.NewInt(1_000_000_000))
-	check("BlockGasCost", block.BlockGasCost(), big.NewInt(100_000))
+	check("BlockGasCost", BlockGasCost(&block), big.NewInt(100_000))
 
 	tx1 := NewTransaction(0, common.HexToAddress("095e7baea6a6c7c4c2dfeb977efac326af552d87"), big.NewInt(10), 50000, big.NewInt(10), nil)
 	tx1, _ = tx1.WithSignature(HomesteadSigner{}, common.Hex2Bytes("9bea4c4daac7c7c52e093e6a4c35dbbcf8856f1af7b059ba20253e70848d094f8a8fae537ce25ed8cb5af9adac3f141af69bd515bd2ba031522df09b97dd72b100"))