Implementation of EIP-7742 for Pectra

web3/engine_api.nim

@@ -26,8 +26,14 @@ createRpcSigsFromNim(RpcClient):
 
   proc engine_newPayloadV1(payload: ExecutionPayloadV1): PayloadStatusV1
   proc engine_newPayloadV2(payload: ExecutionPayloadV2): PayloadStatusV1
-  proc engine_newPayloadV3(payload: ExecutionPayloadV3, expectedBlobVersionedHashes: seq[VersionedHash], parentBeaconBlockRoot: Hash32): PayloadStatusV1
-  proc engine_newPayloadV4(payload: ExecutionPayloadV3, expectedBlobVersionedHashes: seq[VersionedHash], parentBeaconBlockRoot: Hash32, executionRequests: array[3, seq[byte]]): PayloadStatusV1
+  proc engine_newPayloadV3(payload: ExecutionPayloadV3,
+    expectedBlobVersionedHashes: seq[VersionedHash],
+    parentBeaconBlockRoot: Hash32): PayloadStatusV1
+  proc engine_newPayloadV4(payload: ExecutionPayloadV3,
+    expectedBlobVersionedHashes: seq[VersionedHash],
+    parentBeaconBlockRoot: Hash32,
+    executionRequests: array[3, seq[byte]],
+    targetBlobsPerBlock: Quantity): PayloadStatusV1
   proc engine_forkchoiceUpdatedV1(forkchoiceState: ForkchoiceStateV1, payloadAttributes: Opt[PayloadAttributesV1]): ForkchoiceUpdatedResponse
   proc engine_forkchoiceUpdatedV2(forkchoiceState: ForkchoiceStateV1, payloadAttributes: Opt[PayloadAttributesV2]): ForkchoiceUpdatedResponse
   proc engine_forkchoiceUpdatedV3(forkchoiceState: ForkchoiceStateV1, payloadAttributes: Opt[PayloadAttributesV3]): ForkchoiceUpdatedResponse
@@ -55,9 +61,11 @@ createRpcSigsFromNim(RpcClient):
   proc engine_newPayloadV4(payload: ExecutionPayload,
     expectedBlobVersionedHashes: Opt[seq[VersionedHash]],
     parentBeaconBlockRoot: Opt[Hash32],
-    executionRequests: Opt[array[3, seq[byte]]]): PayloadStatusV1
+    executionRequests: Opt[array[3, seq[byte]]],
+    targetBlobsPerBlock: Opt[Quantity]): PayloadStatusV1
   proc engine_forkchoiceUpdatedV2(forkchoiceState: ForkchoiceStateV1, payloadAttributes: Opt[PayloadAttributes]): ForkchoiceUpdatedResponse
   proc engine_forkchoiceUpdatedV3(forkchoiceState: ForkchoiceStateV1, payloadAttributes: Opt[PayloadAttributes]): ForkchoiceUpdatedResponse
+  proc engine_forkchoiceUpdatedV4(forkchoiceState: ForkchoiceStateV1, payloadAttributes: Opt[PayloadAttributes]): ForkchoiceUpdatedResponse
 
 template forkchoiceUpdated*(
     rpcClient: RpcClient,
@@ -77,6 +85,12 @@ template forkchoiceUpdated*(
     payloadAttributes: Opt[PayloadAttributesV3]): Future[ForkchoiceUpdatedResponse] =
   engine_forkchoiceUpdatedV3(rpcClient, forkchoiceState, payloadAttributes)
 
+template forkchoiceUpdated*(
+    rpcClient: RpcClient,
+    forkchoiceState: ForkchoiceStateV1,
+    payloadAttributes: Opt[PayloadAttributesV4]): Future[ForkchoiceUpdatedResponse] =
+  engine_forkchoiceUpdatedV4(rpcClient, forkchoiceState, payloadAttributes)
+
 template getPayload*(
     rpcClient: RpcClient,
     T: type ExecutionPayloadV1,
@@ -125,6 +139,17 @@ template newPayload*(
   engine_newPayloadV3(
     rpcClient, payload, versionedHashes, parentBeaconBlockRoot)
 
+template newPayload*(
+    rpcClient: RpcClient,
+    payload: ExecutionPayloadV3,
+    versionedHashes: seq[VersionedHash],
+    parentBeaconBlockRoot: Hash32,
+    executionRequests: array[3, seq[byte]],
+    targetBlobsPerBlock: Quantity): Future[PayloadStatusV1] =
+  engine_newPayloadV4(
+    rpcClient, payload, versionedHashes, parentBeaconBlockRoot,
+    executionRequests, targetBlobsPerBlock)
+
 template exchangeCapabilities*(
     rpcClient: RpcClient,
     methods: seq[string]): Future[seq[string]] =

web3/engine_api_types.nim

@@ -157,6 +157,15 @@ type
     withdrawals*: seq[WithdrawalV1]
     parentBeaconBlockRoot*: Hash32
 
+  PayloadAttributesV4* = object
+    timestamp*: Quantity
+    prevRandao*: Bytes32
+    suggestedFeeRecipient*: Address
+    withdrawals*: seq[WithdrawalV1]
+    parentBeaconBlockRoot*: Hash32
+    targetBlobsPerBlock*: Quantity
+    maxBlobsPerBlock*: Quantity
+
   # This is ugly, but see the comment on ExecutionPayloadV1OrV2.
   PayloadAttributesV1OrV2* = object
     timestamp*: Quantity
@@ -167,7 +176,8 @@ type
   SomePayloadAttributes* =
     PayloadAttributesV1 |
     PayloadAttributesV2 |
-    PayloadAttributesV3
+    PayloadAttributesV3 |
+    PayloadAttributesV4
 
   # https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.4/src/engine/paris.md#payloadstatusv1
   PayloadExecutionStatus* {.pure.} = enum

web3/eth_api_types.nim

@@ -92,6 +92,7 @@ type
     excessBlobGas*: Opt[Quantity]        # EIP-4844
     parentBeaconBlockRoot*: Opt[Hash32]  # EIP-4788
     requestsRoot*: Opt[Hash32]           # EIP-7685
+    targetBlobCount*: Opt[Quantity]      # EIP-7742
 
   WithdrawalObject* = object
     index*: Quantity

web3/execution_types.nim

@@ -43,6 +43,8 @@ type
     suggestedFeeRecipient*: Address
     withdrawals*: Opt[seq[WithdrawalV1]]
     parentBeaconBlockRoot*: Opt[Hash32]
+    targetBlobsPerBlock*: Opt[Quantity]
+    maxBlobsPerBlock*: Opt[Quantity]
 
   SomeOptionalPayloadAttributes* =
     Opt[PayloadAttributesV1] |
@@ -71,7 +73,9 @@ func version*(payload: ExecutionPayload): Version =
     Version.V1
 
 func version*(attr: PayloadAttributes): Version =
-  if attr.parentBeaconBlockRoot.isSome:
+  if attr.targetBlobsPerBlock.isSome or attr.maxBlobsPerBlock.isSome:
+    Version.V4
+  elif attr.parentBeaconBlockRoot.isSome:
     Version.V3
   elif attr.withdrawals.isSome:
     Version.V2
@@ -120,6 +124,17 @@ func V3*(attr: PayloadAttributes): PayloadAttributesV3 =
     parentBeaconBlockRoot: attr.parentBeaconBlockRoot.get
   )
 
+func V4*(attr: PayloadAttributes): PayloadAttributesV4 =
+  PayloadAttributesV4(
+    timestamp: attr.timestamp,
+    prevRandao: attr.prevRandao,
+    suggestedFeeRecipient: attr.suggestedFeeRecipient,
+    withdrawals: attr.withdrawals.get(newSeq[WithdrawalV1]()),
+    parentBeaconBlockRoot: attr.parentBeaconBlockRoot.get,
+    targetBlobsPerBlock: attr.targetBlobsPerBlock.get,
+    maxBlobsPerBlock: attr.maxBlobsPerBlock.get,
+  )
+
 func V1*(attr: Opt[PayloadAttributes]): Opt[PayloadAttributesV1] =
   if attr.isNone:
     return Opt.none(PayloadAttributesV1)
@@ -135,6 +150,11 @@ func V3*(attr: Opt[PayloadAttributes]): Opt[PayloadAttributesV3] =
     return Opt.none(PayloadAttributesV3)
   Opt.some(attr.get.V3)
 
+func V4*(attr: Opt[PayloadAttributes]): Opt[PayloadAttributesV4] =
+  if attr.isNone:
+    return Opt.none(PayloadAttributesV4)
+  Opt.some(attr.get.V4)
+
 func payloadAttributes*(attr: PayloadAttributesV1): PayloadAttributes =
   PayloadAttributes(
     timestamp: attr.timestamp,
@@ -159,6 +179,17 @@ func payloadAttributes*(attr: PayloadAttributesV3): PayloadAttributes =
     parentBeaconBlockRoot: Opt.some(attr.parentBeaconBlockRoot)
   )
 
+func payloadAttributes*(attr: PayloadAttributesV4): PayloadAttributes =
+  PayloadAttributes(
+    timestamp: attr.timestamp,
+    prevRandao: attr.prevRandao,
+    suggestedFeeRecipient: attr.suggestedFeeRecipient,
+    withdrawals: Opt.some(attr.withdrawals),
+    parentBeaconBlockRoot: Opt.some(attr.parentBeaconBlockRoot),
+    targetBlobsPerBlock: Opt.some(attr.targetBlobsPerBlock),
+    maxBlobsPerBlock: Opt.some(attr.maxBlobsPerBlock),
+  )
+
 func payloadAttributes*(x: Opt[PayloadAttributesV1]): Opt[PayloadAttributes] =
   if x.isNone: Opt.none(PayloadAttributes)
   else: Opt.some(payloadAttributes x.get)
@@ -171,6 +202,10 @@ func payloadAttributes*(x: Opt[PayloadAttributesV3]): Opt[PayloadAttributes] =
   if x.isNone: Opt.none(PayloadAttributes)
   else: Opt.some(payloadAttributes x.get)
 
+func payloadAttributes*(x: Opt[PayloadAttributesV4]): Opt[PayloadAttributes] =
+  if x.isNone: Opt.none(PayloadAttributes)
+  else: Opt.some(payloadAttributes x.get)
+
 func V1V2*(p: ExecutionPayload): ExecutionPayloadV1OrV2 =
   ExecutionPayloadV1OrV2(
     parentHash: p.parentHash,