eth/catalyst: add catalyst API prototype (#22641)

This change adds the --catalyst flag, enabling an RPC API for eth2 integration.
In this initial version, catalyst mode also disables all peer-to-peer networking.

Co-authored-by: Mikhail Kalinin <noblesse.knight@gmail.com>
Co-authored-by: Felix Lange <fjl@twurst.com>

eth/catalyst/gen_ed.go

@@ -0,0 +1,117 @@
+// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
+
+package catalyst
+
+import (
+	"encoding/json"
+	"errors"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+)
+
+var _ = (*executableDataMarshaling)(nil)
+
+// MarshalJSON marshals as JSON.
+func (e executableData) MarshalJSON() ([]byte, error) {
+	type executableData struct {
+		BlockHash    common.Hash     `json:"blockHash"     gencodec:"required"`
+		ParentHash   common.Hash     `json:"parentHash"    gencodec:"required"`
+		Miner        common.Address  `json:"miner"         gencodec:"required"`
+		StateRoot    common.Hash     `json:"stateRoot"     gencodec:"required"`
+		Number       hexutil.Uint64  `json:"number"        gencodec:"required"`
+		GasLimit     hexutil.Uint64  `json:"gasLimit"      gencodec:"required"`
+		GasUsed      hexutil.Uint64  `json:"gasUsed"       gencodec:"required"`
+		Timestamp    hexutil.Uint64  `json:"timestamp"     gencodec:"required"`
+		ReceiptRoot  common.Hash     `json:"receiptsRoot"  gencodec:"required"`
+		LogsBloom    hexutil.Bytes   `json:"logsBloom"     gencodec:"required"`
+		Transactions []hexutil.Bytes `json:"transactions"  gencodec:"required"`
+	}
+	var enc executableData
+	enc.BlockHash = e.BlockHash
+	enc.ParentHash = e.ParentHash
+	enc.Miner = e.Miner
+	enc.StateRoot = e.StateRoot
+	enc.Number = hexutil.Uint64(e.Number)
+	enc.GasLimit = hexutil.Uint64(e.GasLimit)
+	enc.GasUsed = hexutil.Uint64(e.GasUsed)
+	enc.Timestamp = hexutil.Uint64(e.Timestamp)
+	enc.ReceiptRoot = e.ReceiptRoot
+	enc.LogsBloom = e.LogsBloom
+	if e.Transactions != nil {
+		enc.Transactions = make([]hexutil.Bytes, len(e.Transactions))
+		for k, v := range e.Transactions {
+			enc.Transactions[k] = v
+		}
+	}
+	return json.Marshal(&enc)
+}
+
+// UnmarshalJSON unmarshals from JSON.
+func (e *executableData) UnmarshalJSON(input []byte) error {
+	type executableData struct {
+		BlockHash    *common.Hash    `json:"blockHash"     gencodec:"required"`
+		ParentHash   *common.Hash    `json:"parentHash"    gencodec:"required"`
+		Miner        *common.Address `json:"miner"         gencodec:"required"`
+		StateRoot    *common.Hash    `json:"stateRoot"     gencodec:"required"`
+		Number       *hexutil.Uint64 `json:"number"        gencodec:"required"`
+		GasLimit     *hexutil.Uint64 `json:"gasLimit"      gencodec:"required"`
+		GasUsed      *hexutil.Uint64 `json:"gasUsed"       gencodec:"required"`
+		Timestamp    *hexutil.Uint64 `json:"timestamp"     gencodec:"required"`
+		ReceiptRoot  *common.Hash    `json:"receiptsRoot"  gencodec:"required"`
+		LogsBloom    *hexutil.Bytes  `json:"logsBloom"     gencodec:"required"`
+		Transactions []hexutil.Bytes `json:"transactions"  gencodec:"required"`
+	}
+	var dec executableData
+	if err := json.Unmarshal(input, &dec); err != nil {
+		return err
+	}
+	if dec.BlockHash == nil {
+		return errors.New("missing required field 'blockHash' for executableData")
+	}
+	e.BlockHash = *dec.BlockHash
+	if dec.ParentHash == nil {
+		return errors.New("missing required field 'parentHash' for executableData")
+	}
+	e.ParentHash = *dec.ParentHash
+	if dec.Miner == nil {
+		return errors.New("missing required field 'miner' for executableData")
+	}
+	e.Miner = *dec.Miner
+	if dec.StateRoot == nil {
+		return errors.New("missing required field 'stateRoot' for executableData")
+	}
+	e.StateRoot = *dec.StateRoot
+	if dec.Number == nil {
+		return errors.New("missing required field 'number' for executableData")
+	}
+	e.Number = uint64(*dec.Number)
+	if dec.GasLimit == nil {
+		return errors.New("missing required field 'gasLimit' for executableData")
+	}
+	e.GasLimit = uint64(*dec.GasLimit)
+	if dec.GasUsed == nil {
+		return errors.New("missing required field 'gasUsed' for executableData")
+	}
+	e.GasUsed = uint64(*dec.GasUsed)
+	if dec.Timestamp == nil {
+		return errors.New("missing required field 'timestamp' for executableData")
+	}
+	e.Timestamp = uint64(*dec.Timestamp)
+	if dec.ReceiptRoot == nil {
+		return errors.New("missing required field 'receiptsRoot' for executableData")
+	}
+	e.ReceiptRoot = *dec.ReceiptRoot
+	if dec.LogsBloom == nil {
+		return errors.New("missing required field 'logsBloom' for executableData")
+	}
+	e.LogsBloom = *dec.LogsBloom
+	if dec.Transactions == nil {
+		return errors.New("missing required field 'transactions' for executableData")
+	}
+	e.Transactions = make([][]byte, len(dec.Transactions))
+	for k, v := range dec.Transactions {
+		e.Transactions[k] = v
+	}
+	return nil
+}