diff --git a/nimbus/core/casper.nim b/nimbus/core/casper.nim
index 801758ddb..7d913060c 100644
--- a/nimbus/core/casper.nim
+++ b/nimbus/core/casper.nim
@@ -11,9 +11,9 @@ import
 
 type
   CasperRef* = ref object
-    feeRecipient* : EthAddress
-    timestamp*    : EthTime
-    prevRandao*   : Hash256
+    feeRecipient : EthAddress
+    timestamp    : EthTime
+    prevRandao   : Hash256
 
 proc prepare*(ctx: CasperRef, header: var BlockHeader) =
   header.coinbase   = ctx.feeRecipient
@@ -21,7 +21,7 @@ proc prepare*(ctx: CasperRef, header: var BlockHeader) =
   header.prevRandao = ctx.prevRandao
   header.difficulty = DifficultyInt.zero
 
-proc prepareForSeal*(ctx: CasperRef, header: var BlockHeader) =
+proc prepareForSeal*(ctx: CasperRef, header: var BlockHeader) {.gcsafe, raises:[RlpError].} =
   header.nonce      = default(BlockNonce)
   header.extraData  = @[] # TODO: probably this should be configurable by user?
   # this repetition, assigning prevRandao is because how txpool works
diff --git a/nimbus/core/sealer.nim b/nimbus/core/sealer.nim
index d5cd6bf53..3d01f42fa 100644
--- a/nimbus/core/sealer.nim
+++ b/nimbus/core/sealer.nim
@@ -33,6 +33,10 @@ import
 from web3/ethtypes as web3types import nil, TypedTransaction, WithdrawalV1, ExecutionPayloadV1OrV2, toExecutionPayloadV1OrV2, toExecutionPayloadV1
 from web3/engine_api_types import PayloadAttributesV1, ExecutionPayloadV1, PayloadAttributesV2, ExecutionPayloadV2
 
+export
+  # generateExecutionPayload caller will need this
+  casper
+
 type
   EngineState* = enum
     EngineStopped,
@@ -142,6 +146,17 @@ template unsafeQuantityToInt64(q: web3types.Quantity): int64 =
 proc toTypedTransaction(tx: Transaction): TypedTransaction =
   web3types.TypedTransaction(rlp.encode(tx))
 
+func toWithdrawal(x: WithdrawalV1): Withdrawal =
+  result.index = x.index.uint64
+  result.validatorIndex = x.validatorIndex.uint64
+  result.address = x.address.EthAddress
+  result.amount = x.amount.uint64
+
+func toWithdrawals(list: openArray[WithdrawalV1]): seq[Withdrawal] =
+  result = newSeqOfCap[Withdrawal](list.len)
+  for x in list:
+    result.add toWithdrawal(x)
+
 proc generateExecutionPayload*(engine: SealingEngineRef,
                                payloadAttrs: PayloadAttributesV1 | PayloadAttributesV2): Result[ExecutionPayloadV1OrV2, string] =
   let
@@ -153,6 +168,11 @@ proc generateExecutionPayload*(engine: SealingEngineRef,
   pos.timestamp    = fromUnix(payloadAttrs.timestamp.unsafeQuantityToInt64)
   pos.feeRecipient = EthAddress payloadAttrs.suggestedFeeRecipient
 
+  when payloadAttrs is PayloadAttributesV2:
+    engine.txPool.withdrawals = payloadAttrs.withdrawals.toWithdrawals
+  else:
+    engine.txPool.withdrawals = @[]
+
   if headBlock.blockHash != engine.txPool.head.blockHash:
     # reorg
     discard engine.txPool.smartHead(headBlock)
diff --git a/nimbus/core/tx_pool.nim b/nimbus/core/tx_pool.nim
index 770c1e3cf..4457205d3 100644
--- a/nimbus/core/tx_pool.nim
+++ b/nimbus/core/tx_pool.nim
@@ -436,7 +436,8 @@ import
   chronicles,
   eth/keys,
   stew/[keyed_queue, results],
-  ../common/common
+  ../common/common,
+  ./casper
 
 export
   TxItemRef,
@@ -621,6 +622,10 @@ proc ethBlock*(xp: TxPoolRef): EthBlock
   for (_,nonceList) in xp.txDB.packingOrderAccounts(txItemPacked):
     result.txs.add toSeq(nonceList.incNonce).mapIt(it.tx)
 
+  let com = xp.chain.com
+  if com.consensus == ConsensusType.POS:
+    result.withdrawals = some(xp.chain.withdrawals)
+
 proc gasCumulative*(xp: TxPoolRef): GasInt =
   ## Getter, retrieves the gas that will be burned in the block after
   ## retrieving it via `ethBlock`.
@@ -766,6 +771,9 @@ proc `minTipPrice=`*(xp: TxPoolRef; val: GasPrice) =
     xp.pMinTipPrice = val
     xp.pDirtyBuckets = true
 
+proc `withdrawals=`*(xp: TxPoolRef, val: sink seq[Withdrawal]) =
+  xp.chain.withdrawals = system.move(val)
+
 # ------------------------------------------------------------------------------
 # Public functions, per-tx-item operations
 # ------------------------------------------------------------------------------
diff --git a/nimbus/core/tx_pool/tx_chain.nim b/nimbus/core/tx_pool/tx_chain.nim
index 90405874e..9216e1b60 100644
--- a/nimbus/core/tx_pool/tx_chain.nim
+++ b/nimbus/core/tx_pool/tx_chain.nim
@@ -66,6 +66,7 @@ type
     limits: TxChainGasLimits ## Gas limits for packer and next header
     txEnv: TxChainPackerEnv  ## Assorted parameters, tx packer environment
     prepHeader: BlockHeader  ## Prepared Header from Consensus Engine
+    withdrawals: seq[Withdrawal]
 
 # ------------------------------------------------------------------------------
 # Private functions
@@ -90,7 +91,7 @@ proc prepareHeader(dh: TxChainRef; parent: BlockHeader)
   of ConsensusType.POS:
     dh.com.pos.prepare(dh.prepHeader)
 
-proc prepareForSeal(dh: TxChainRef; header: var BlockHeader) {.gcsafe, raises: [].} =
+proc prepareForSeal(dh: TxChainRef; header: var BlockHeader) {.gcsafe, raises: [RlpError].} =
   case dh.com.consensus
   of ConsensusType.POW:
     # do nothing, tx pool was designed with POW in mind
@@ -201,6 +202,9 @@ proc getHeader*(dh: TxChainRef): BlockHeader
     # nonce:     BlockNonce # mining free vaiable
     fee:         dh.txEnv.vmState.fee)
 
+  if dh.com.forkGTE(Shanghai):
+    result.withdrawalsRoot = some(calcWithdrawalsRoot(dh.withdrawals))
+
   dh.prepareForSeal(result)
 
 proc clearAccounts*(dh: TxChainRef)
@@ -280,6 +284,10 @@ proc vmState*(dh: TxChainRef): BaseVMState =
   ## Getter, `BaseVmState` descriptor based on the current insertion point.
   dh.txEnv.vmState
 
+proc withdrawals*(dh: TxChainRef): seq[Withdrawal] =
+  ## Getter, `BaseVmState` descriptor based on the current insertion point.
+  result = system.move(dh.withdrawals)
+
 # ------------------------------------------------------------------------------
 # Public functions, setters
 # ------------------------------------------------------------------------------
@@ -342,6 +350,9 @@ proc `txRoot=`*(dh: TxChainRef; val: Hash256) =
   ## Setter
   dh.txEnv.txRoot = val
 
+proc `withdrawals=`*(dh: TxChainRef, val: sink seq[Withdrawal]) =
+  dh.withdrawals = system.move(val)
+
 # ------------------------------------------------------------------------------
 # End
 # ------------------------------------------------------------------------------
diff --git a/vendor/nim-eth b/vendor/nim-eth
index d57a1094b..e639dc1e1 160000
--- a/vendor/nim-eth
+++ b/vendor/nim-eth
@@ -1 +1 @@
-Subproject commit d57a1094b1c0d6faa6b3b70ae653948299266fa3
+Subproject commit e639dc1e145722ec137639ee040eddc524f853dd