diff --git a/ethers/provider.nim b/ethers/provider.nim
index f306224..f092861 100644
--- a/ethers/provider.nim
+++ b/ethers/provider.nim
@@ -79,6 +79,15 @@ logScope:
 template raiseProviderError(message: string) =
   raise newException(ProviderError, message)
 
+func toTransaction*(past: PastTransaction): Transaction =
+  Transaction(
+    sender: some past.sender,
+    gasPrice: some past.gasPrice,
+    data: past.input,
+    nonce: some past.nonce,
+    to: past.to
+  )
+
 method getBlockNumber*(provider: Provider): Future[UInt256] {.base, gcsafe.} =
   doAssert false, "not implemented"
 
@@ -144,7 +153,7 @@ method subscribe*(provider: Provider,
 method unsubscribe*(subscription: Subscription) {.base, async.} =
   doAssert false, "not implemented"
 
-proc replay*(provider: Provider, tx: PastTransaction, blockNumber: UInt256) {.async.} =
+proc replay*(provider: Provider, tx: Transaction, blockNumber: UInt256) {.async.} =
   # Replay transaction at block. Useful for fetching revert reasons, which will
   # be present in the raised error message. The replayed block number should
   # include the state of the chain in the block previous to the block in which
@@ -160,11 +169,11 @@ method getRevertReason*(
   blockNumber: UInt256
 ): Future[?string] {.base, async.} =
 
-  without transaction =? await provider.getTransaction(hash):
+  without pastTx =? await provider.getTransaction(hash):
     return none string
 
   try:
-    await provider.replay(transaction, blockNumber)
+    await provider.replay(pastTx.toTransaction, blockNumber)
     return none string
   except ProviderError as e:
     # should contain the revert reason
diff --git a/ethers/providers/jsonrpc/conversions.nim b/ethers/providers/jsonrpc/conversions.nim
index 7dc5866..4a76c69 100644
--- a/ethers/providers/jsonrpc/conversions.nim
+++ b/ethers/providers/jsonrpc/conversions.nim
@@ -16,6 +16,11 @@ type JsonSerializationError = object of EthersError
 template raiseSerializationError(message: string) =
   raise newException(JsonSerializationError, message)
 
+proc expectFields(json: JsonNode, expectedFields: varargs[string]) =
+  for fieldName in expectedFields:
+    if not json.hasKey(fieldName):
+      raiseSerializationError(fmt"'{fieldName}' field not found in ${json}")
+
 func fromJson*(T: type, json: JsonNode, name = ""): T =
   fromJson(json, name, result)
 
@@ -97,11 +102,6 @@ func `%`*(status: TransactionStatus): JsonNode =
 
 # PastTransaction
 
-proc expectFields(json: JsonNode, expectedFields: varargs[string]) =
-  for fieldName in expectedFields:
-    if not json.hasKey(fieldName):
-      raiseSerializationError(fmt"'{fieldName}' field not found in ${json}")
-
 func fromJson*(json: JsonNode, name: string, result: var PastTransaction) =
   # Deserializes a past transaction, eg eth_getTransactionByHash.
   # Spec: https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_gettransactionbyhash
diff --git a/ethers/wallet.nim b/ethers/wallet.nim
index 72177be..85305f6 100644
--- a/ethers/wallet.nim
+++ b/ethers/wallet.nim
@@ -8,6 +8,7 @@ import ./wallet/signing
 
 export keys
 export WalletError
+export signing
 
 var rng {.threadvar.}: ref HmacDrbgContext
 
diff --git a/ethers/wallet/signing.nim b/ethers/wallet/signing.nim
index b56e406..2ea9fbf 100644
--- a/ethers/wallet/signing.nim
+++ b/ethers/wallet/signing.nim
@@ -1,8 +1,10 @@
 import pkg/eth/keys
 import pkg/eth/rlp
 import pkg/eth/common/transaction as eth
+import pkg/eth/common/eth_hash
 import ../basics
 import ../transaction as ethers
+import ../provider
 import ./error
 
 type
@@ -62,3 +64,6 @@ func sign(key: PrivateKey, transaction: SignableTransaction): seq[byte] =
 
 func sign*(key: PrivateKey, transaction: Transaction): seq[byte] =
   key.sign(transaction.toSignableTransaction())
+
+func toTransactionHash*(bytes: seq[byte]): TransactionHash =
+  TransactionHash(bytes.keccakHash.data)
diff --git a/testmodule/testContracts.nim b/testmodule/testContracts.nim
index cf8a140..af9e470 100644
--- a/testmodule/testContracts.nim
+++ b/testmodule/testContracts.nim
@@ -7,6 +7,7 @@ import pkg/stint
 import pkg/ethers
 import pkg/ethers/erc20
 import pkg/ethers/testing
+import pkg/ethers/wallet
 import ./hardhat
 import ./helpers
 import ./miner