diff --git a/ethers/contract.nim b/ethers/contract.nim
index 4c047f6..1bef12d 100644
--- a/ethers/contract.nim
+++ b/ethers/contract.nim
@@ -58,8 +58,8 @@ func signer*(contract: Contract): ?Signer =
 func address*(contract: Contract): Address =
   contract.address
 
-template raiseContractError(message: string, parent: ref Exception = nil) =
-  raise newException(ContractError, message, parent)
+template raiseContractError(message: string) =
+  raise newException(ContractError, message)
 
 proc createTransaction(contract: Contract,
                        function: string,
diff --git a/ethers/providers/jsonrpc.nim b/ethers/providers/jsonrpc.nim
index 37d1257..96941a8 100644
--- a/ethers/providers/jsonrpc.nim
+++ b/ethers/providers/jsonrpc.nim
@@ -260,5 +260,4 @@ method sendTransaction*(signer: JsonRpcSigner,
       client = await signer.provider.client
       hash = await client.eth_sendTransaction(transaction)
 
-    trace "jsonrpc sendTransaction RESPONSE", nonce = transaction.nonce, hash = hash.to0xHex
     return TransactionResponse(hash: hash, provider: signer.provider)
diff --git a/ethers/providers/jsonrpc/conversions.nim b/ethers/providers/jsonrpc/conversions.nim
index d4f6c98..6f89542 100644
--- a/ethers/providers/jsonrpc/conversions.nim
+++ b/ethers/providers/jsonrpc/conversions.nim
@@ -1,7 +1,6 @@
 import std/json
 import std/strformat
 import std/strutils
-import std/typetraits
 import pkg/json_rpc/jsonmarshal
 import pkg/stew/byteutils
 import ../../basics