diff --git a/beacon_chain/el/deposit_contract.nim b/beacon_chain/el/deposit_contract.nim
index 42c739bab..7f92ef769 100644
--- a/beacon_chain/el/deposit_contract.nim
+++ b/beacon_chain/el/deposit_contract.nim
@@ -14,7 +14,7 @@ import
   ../networking/network_metadata,
   web3, web3/confutils_defs, eth/keys, eth/p2p/discoveryv5/random2,
   stew/[io2, byteutils],
-  ../spec/eth2_merkleization,
+  ../spec/[eth2_merkleization, helpers],
   ../spec/datatypes/base,
   ../validators/keystore_management
 
@@ -136,16 +136,13 @@ proc sendEth(web3: Web3, to: Eth1Address, valueEth: int): Future[TxHash] =
     `from`: web3.defaultAccount,
     gas: Quantity(3000000).some,
     gasPrice: Quantity(1).some,
-    value: some(valueEth.u256 * 1000000000000000000.u256),
+    value: some(valueEth.toWei),
     to: some(to))
   web3.send(tr)
 
 type
   DelayGenerator* = proc(): chronos.Duration {.gcsafe, raises: [].}
 
-proc ethToWei(eth: UInt256): UInt256 =
-  eth * 1000000000000000000.u256
-
 proc initWeb3(web3Url, privateKey: string): Future[Web3] {.async.} =
   result = await newWeb3(web3Url)
   if privateKey.len != 0:
@@ -180,7 +177,7 @@ proc sendDeposits*(deposits: seq[LaunchPadDeposit],
           SignatureBytes(@(dp.signature.toRaw())),
           FixedBytes[32](hash_tree_root(dp).data))
 
-        let status = await tx.send(value = 32.u256.ethToWei, gasPrice = gasPrice)
+        let status = await tx.send(value = 32.toWei, gasPrice = gasPrice)
 
         info "Deposit sent", tx = $status
 
diff --git a/beacon_chain/spec/helpers.nim b/beacon_chain/spec/helpers.nim
index 425310648..a7780aa3c 100644
--- a/beacon_chain/spec/helpers.nim
+++ b/beacon_chain/spec/helpers.nim
@@ -523,3 +523,9 @@ proc blockToBlockHeader*(blck: ForkyBeaconBlock): ExecutionBlockHeader =
 
 proc compute_execution_block_hash*(blck: ForkyBeaconBlock): Eth2Digest =
   rlpHash blockToBlockHeader(blck)
+
+func toWei*(eth: SomeInteger): UInt256 =
+  eth.u256 * 1000000000000000000.u256
+
+func toWei*(eth: UInt256): UInt256 =
+  eth * 1000000000000000000.u256
diff --git a/beacon_chain/validators/rewards.nim b/beacon_chain/validators/rewards.nim
index eaf200077..2c76a566c 100644
--- a/beacon_chain/validators/rewards.nim
+++ b/beacon_chain/validators/rewards.nim
@@ -7,7 +7,7 @@
 
 {.push raises: [].}
 
-import ".."/spec/[forks, beaconstate, state_transition_block]
+import ".."/spec/[forks, beaconstate, state_transition_block, helpers]
 
 type
   AuxiliaryState = object
@@ -56,6 +56,8 @@ template withStateAndMaybeBlindedBlck(
     const consensusFork {.inject, used.} = ConsensusFork.Deneb
     template forkyState: untyped {.inject.} = s.denebData
     template forkyBlck: untyped {.inject.} = b
+  else:
+    {.error: "withStateAndMaybeBlindedBlock does not support " & $typeof(b).}
 
 func init(t: typedesc[AuxiliaryState],
           forkedState: ForkedHashedBeaconState): Opt[AuxiliaryState] =
@@ -166,9 +168,6 @@ proc collectFromSyncAggregate(
         if aggregate.sync_committee_bits[i]:
           proposerOutcome += proposer_reward
 
-proc gweiToWei(eth: Gwei): UInt256 =
-  eth.u256 * 1000000000000000000.u256
-
 proc collectBlockRewards*(
     forkedState: ForkedHashedBeaconState,
     forkedBlock: RewardingBlock
@@ -184,4 +183,4 @@ proc collectBlockRewards*(
   reward.collectFromAttestations(
     forkedState, forkedBlock, auxiliaryState, cache)
   reward.collectFromSyncAggregate(forkedState, forkedBlock, cache)
-  ok(gweiToWei(reward))
+  ok(reward.toWei)
diff --git a/ncli/ncli_testnet.nim b/ncli/ncli_testnet.nim
index 9f61a8412..5e79fac92 100644
--- a/ncli/ncli_testnet.nim
+++ b/ncli/ncli_testnet.nim
@@ -15,7 +15,7 @@ import
   ../beacon_chain/conf,
   ../beacon_chain/el/el_manager,
   ../beacon_chain/networking/eth2_network,
-  ../beacon_chain/spec/eth2_merkleization,
+  ../beacon_chain/spec/[eth2_merkleization, helpers],
   ../beacon_chain/spec/datatypes/base,
   ../beacon_chain/spec/eth2_apis/eth2_rest_serialization,
   ../beacon_chain/validators/keystore_management,
@@ -518,16 +518,13 @@ proc sendEth(web3: Web3, to: Eth1Address, valueEth: int): Future[TxHash] =
     `from`: web3.defaultAccount,
     gas: Quantity(3000000).some,
     gasPrice: Quantity(1).some,
-    value: some(valueEth.u256 * 1000000000000000000.u256),
+    value: some(valueEth.toWei),
     to: some(to))
   web3.send(tr)
 
 type
   DelayGenerator = proc(): chronos.Duration {.gcsafe, raises: [].}
 
-func ethToWei(eth: UInt256): UInt256 =
-  eth * 1000000000000000000.u256
-
 proc initWeb3(web3Url, privateKey: string): Future[Web3] {.async.} =
   result = await newWeb3(web3Url)
   if privateKey.len != 0:
@@ -562,7 +559,7 @@ proc sendDeposits(deposits: seq[LaunchPadDeposit],
           SignatureBytes(@(dp.signature.toRaw())),
           FixedBytes[32](hash_tree_root(dp).data))
 
-        let status = await tx.send(value = 32.u256.ethToWei, gasPrice = gasPrice)
+        let status = await tx.send(value = 32.toWei, gasPrice = gasPrice)
 
         info "Deposit sent", tx = $status