diff --git a/hive_integration/nodocker/engine/node.nim b/hive_integration/nodocker/engine/node.nim
index 8109ba90c..390f9fafa 100644
--- a/hive_integration/nodocker/engine/node.nim
+++ b/hive_integration/nodocker/engine/node.nim
@@ -99,7 +99,7 @@ proc setBlock*(c: ChainRef; blk: Block): Result[void, string] =
   let
     vmState = c.getVmState(header).valueOr:
       return err("no vmstate")
-    stateRootChpt = vmState.parent.stateRoot # Check point
+    _ = vmState.parent.stateRoot # Check point
   ? vmState.processBlock(blk)
 
   if not c.db.persistHeader(
diff --git a/hive_integration/nodocker/pyspec/test_env.nim b/hive_integration/nodocker/pyspec/test_env.nim
index 9e41881de..bced73a2d 100644
--- a/hive_integration/nodocker/pyspec/test_env.nim
+++ b/hive_integration/nodocker/pyspec/test_env.nim
@@ -13,7 +13,6 @@ import
   stew/[byteutils],
   json_rpc/[rpcserver, rpcclient],
   ../../../nimbus/[
-    config,
     constants,
     transaction,
     db/ledger,
diff --git a/hive_integration/nodocker/rpc/client.nim b/hive_integration/nodocker/rpc/client.nim
index 44086ea2a..c8bf600dd 100644
--- a/hive_integration/nodocker/rpc/client.nim
+++ b/hive_integration/nodocker/rpc/client.nim
@@ -43,11 +43,6 @@ proc nonceAt*(client: RpcClient, address: Address): Future[AccountNonce] {.async
   let hex = await client.eth_getTransactionCount(address, blockId("latest"))
   result = hex.AccountNonce
 
-func toTopics(list: openArray[Hash32]): seq[eth_types.Topic] =
-  result = newSeqOfCap[eth_types.Topic](list.len)
-  for x in list:
-    result.add eth_types.Topic(x)
-
 func toLogs(list: openArray[LogObject]): seq[Log] =
   result = newSeqOfCap[Log](list.len)
   for x in list:
diff --git a/nimbus/config.nim b/nimbus/config.nim
index 76e1c2faf..716cdd590 100644
--- a/nimbus/config.nim
+++ b/nimbus/config.nim
@@ -11,7 +11,6 @@
 import
   std/[
     options,
-    strformat,
     strutils,
     times,
     os,
diff --git a/nimbus/db/aristo/aristo_check/check_be.nim b/nimbus/db/aristo/aristo_check/check_be.nim
index 6bee548d4..e7d98f229 100644
--- a/nimbus/db/aristo/aristo_check/check_be.nim
+++ b/nimbus/db/aristo/aristo_check/check_be.nim
@@ -52,7 +52,7 @@ proc checkBE*[T: RdbBackendRef|MemBackendRef|VoidBackendRef](
   for (rvid,key) in T.walkKeyBe db:
     if topVidBe.vid < rvid.vid:
       topVidBe = rvid
-    let vtx = db.getVtxBE(rvid).valueOr:
+    let _ = db.getVtxBE(rvid).valueOr:
       return err((rvid.vid,CheckBeVtxMissing))
 
   # Compare calculated `vTop` against database state
diff --git a/nimbus/db/aristo/aristo_fetch.nim b/nimbus/db/aristo/aristo_fetch.nim
index c1a9ae0c8..7e40adf62 100644
--- a/nimbus/db/aristo/aristo_fetch.nim
+++ b/nimbus/db/aristo/aristo_fetch.nim
@@ -96,19 +96,6 @@ proc retrieveMerkleHash(
       key
   ok key.to(Hash32)
 
-
-proc hasPayload(
-    db: AristoDbRef;
-    root: VertexID;
-    path: openArray[byte];
-      ): Result[bool,AristoError] =
-  let error = db.retrieveLeaf(root, path).errorOr:
-    return ok(true)
-
-  if error == FetchPathNotFound:
-    return ok(false)
-  err(error)
-
 proc hasAccountPayload(
     db: AristoDbRef;
     accPath: Hash32;
diff --git a/nimbus/db/aristo/aristo_nearby.nim b/nimbus/db/aristo/aristo_nearby.nim
index f556dca52..cfc850e52 100644
--- a/nimbus/db/aristo/aristo_nearby.nim
+++ b/nimbus/db/aristo/aristo_nearby.nim
@@ -21,7 +21,7 @@
 {.push raises: [].}
 
 import
-  std/[tables, typetraits],
+  std/[tables],
   eth/common,
   results,
   "."/[aristo_desc, aristo_fetch, aristo_get, aristo_hike, aristo_path]
diff --git a/nimbus/db/aristo/aristo_part/part_chain_rlp.nim b/nimbus/db/aristo/aristo_part/part_chain_rlp.nim
index 05760d55f..bb4cb6078 100644
--- a/nimbus/db/aristo/aristo_part/part_chain_rlp.nim
+++ b/nimbus/db/aristo/aristo_part/part_chain_rlp.nim
@@ -37,7 +37,7 @@ proc chainRlpNodes*(
       ): Result[void,AristoError] =
   ## Inspired by the `getBranchAux()` function from `hexary.nim`
   let
-    key = ? db.computeKey rvid
+    _ = ? db.computeKey rvid
     (vtx,_) = ? db.getVtxRc rvid
     node = vtx.toNode(rvid.root, db).valueOr:
       return err(PartChnNodeConvError)
diff --git a/nimbus/db/core_db/backend/aristo_trace.nim b/nimbus/db/core_db/backend/aristo_trace.nim
index 792fbdd4e..5322b57fe 100644
--- a/nimbus/db/core_db/backend/aristo_trace.nim
+++ b/nimbus/db/core_db/backend/aristo_trace.nim
@@ -230,21 +230,6 @@ proc jLogger(
       ) =
   tr.jLogger(EmptyBlob, ti)
 
-proc jLogger(
-    tr: TraceRecorderRef;
-    root: VertexID;
-    path: openArray[byte];
-    ti: TraceDataItemRef;
-      ) =
-  tr.jLogger(@[root.byte] & @path, ti)
-
-proc jLogger(
-    tr: TraceRecorderRef;
-    root: VertexID;
-    ti: TraceDataItemRef;
-      ) =
-  tr.jLogger(@[root.byte], ti)
-
 proc jLogger(
     tr: TraceRecorderRef;
     accPath: Hash32;
diff --git a/nimbus/sync/beacon/worker.nim b/nimbus/sync/beacon/worker.nim
index a4c5aec1a..95ddc02cb 100644
--- a/nimbus/sync/beacon/worker.nim
+++ b/nimbus/sync/beacon/worker.nim
@@ -156,8 +156,6 @@ proc runPeer*(buddy: BeaconBuddyRef; info: static[string]) {.async.} =
   ## This peer worker method is repeatedly invoked (exactly one per peer) while
   ## the `buddy.ctrl.poolMode` flag is set `false`.
   ##
-  let peer = buddy.peer
-
   if 0 < buddy.only.nMultiLoop:                 # statistics/debugging
     buddy.only.multiRunIdle = Moment.now() - buddy.only.stoppedMultiRun
   buddy.only.nMultiLoop.inc                     # statistics/debugging
diff --git a/nimbus/sync/beacon/worker/db.nim b/nimbus/sync/beacon/worker/db.nim
index d8ae4c2f0..feb53ea2f 100644
--- a/nimbus/sync/beacon/worker/db.nim
+++ b/nimbus/sync/beacon/worker/db.nim
@@ -224,7 +224,7 @@ proc dbPeekParentHash*(ctx: BeaconCtxRef; num: BlockNumber): Opt[Hash32] =
 
 proc dbUnstashHeader*(ctx: BeaconCtxRef; bn: BlockNumber) =
   ## Remove header from temporary DB list
-  ctx.stash.withValue(bn, val):
+  ctx.stash.withValue(bn, _):
     ctx.stash.del bn
     return
   discard ctx.db.ctx.getKvt().del(beaconHeaderKey(bn).toOpenArray)
diff --git a/nimbus/tracer.nim b/nimbus/tracer.nim
index 0cc7aa160..0704a4869 100644
--- a/nimbus/tracer.nim
+++ b/nimbus/tracer.nim
@@ -246,7 +246,6 @@ proc dumpBlockStateImpl(
 
   let
     cc = activate CaptCtxRef.init(com, header)
-    parent = com.db.getBlockHeader(header.parentHash)
 
     # only need a stack dump when scanning for internal transaction address
     captureFlags = {DisableMemory, DisableStorage, EnableAccount}
diff --git a/tests/test_aristo/test_helpers.nim b/tests/test_aristo/test_helpers.nim
index d65ef6ae9..c2a7e830a 100644
--- a/tests/test_aristo/test_helpers.nim
+++ b/tests/test_aristo/test_helpers.nim
@@ -13,7 +13,7 @@ import
   eth/common,
   stew/endians2,
   ../../nimbus/db/aristo/[
-    aristo_debug, aristo_desc, aristo_hike, aristo_layers, aristo_merge,
+    aristo_debug, aristo_desc, aristo_hike, aristo_layers,
     aristo_tx],
   ../replay/pp,
   "."/[undump_accounts, undump_desc, undump_storages, test_samples_xx]
diff --git a/tests/test_ledger.nim b/tests/test_ledger.nim
index 06586d7de..2edea1be0 100644
--- a/tests/test_ledger.nim
+++ b/tests/test_ledger.nim
@@ -348,7 +348,6 @@ proc runLedgerTransactionTests(noisy = true) =
         env.txi.add n
 
     test &"Run {env.txi.len} two-step trials with rollback":
-      let head = env.xdb.getCanonicalHead()
       for n in env.txi:
         let dbTx = env.xdb.ctx.newTransaction()
         defer: dbTx.dispose()
@@ -356,7 +355,6 @@ proc runLedgerTransactionTests(noisy = true) =
         env.runTrial2ok(ledger, n)
 
     test &"Run {env.txi.len} three-step trials with rollback":
-      let head = env.xdb.getCanonicalHead()
       for n in env.txi:
         let dbTx = env.xdb.ctx.newTransaction()
         defer: dbTx.dispose()
@@ -365,7 +363,6 @@ proc runLedgerTransactionTests(noisy = true) =
 
     test &"Run {env.txi.len} three-step trials with extra db frame rollback" &
         " throwing Exceptions":
-      let head = env.xdb.getCanonicalHead()
       for n in env.txi:
         let dbTx = env.xdb.ctx.newTransaction()
         defer: dbTx.dispose()
@@ -373,7 +370,6 @@ proc runLedgerTransactionTests(noisy = true) =
         env.runTrial3Survive(ledger, n, noisy)
 
     test &"Run {env.txi.len} tree-step trials without rollback":
-      let head = env.xdb.getCanonicalHead()
       for n in env.txi:
         let dbTx = env.xdb.ctx.newTransaction()
         defer: dbTx.dispose()
@@ -381,7 +377,6 @@ proc runLedgerTransactionTests(noisy = true) =
         env.runTrial3(ledger, n, rollback = false)
 
     test &"Run {env.txi.len} four-step trials with rollback and db frames":
-      let head = env.xdb.getCanonicalHead()
       for n in env.txi:
         let dbTx = env.xdb.ctx.newTransaction()
         defer: dbTx.dispose()
diff --git a/tests/test_rpc.nim b/tests/test_rpc.nim
index bbca1d1fb..d3f9b81e1 100644
--- a/tests/test_rpc.nim
+++ b/tests/test_rpc.nim
@@ -93,7 +93,7 @@ proc close(client: RpcHttpClient, server: RpcHttpServer) =
 # unless the base distance is reached. This is not the case for the tests, so we
 # have to manually persist the blocks to the db.
 # Main goal of the tests to check the RPC calls, can serve data persisted in the db
-# as data from memory blocks are easily tested via kurtosis or other tests 
+# as data from memory blocks are easily tested via kurtosis or other tests
 proc setupEnv(signer, ks2: Address, ctx: EthContext, com: CommonRef): TestEnv =
   var
     acc = ctx.am.getAccount(signer).tryGet()
@@ -201,7 +201,7 @@ proc setupEnv(signer, ks2: Address, ctx: EthContext, com: CommonRef): TestEnv =
 
   doAssert com.db.persistHeader(header,
     com.pos.isNil, com.startOfHistory)
-    
+
   com.db.persistFixtureBlock()
 
   com.db.persistent(header.number).isOkOr:
@@ -212,7 +212,7 @@ proc setupEnv(signer, ks2: Address, ctx: EthContext, com: CommonRef): TestEnv =
     txHash: signedTx1.rlpHash,
     blockHash: header.blockHash
     )
-  
+
 
 proc rpcMain*() =
   suite "Remote Procedure Calls":
@@ -242,7 +242,7 @@ proc rpcMain*() =
       debugEcho unlock.error
     doAssert(unlock.isOk)
 
-    let 
+    let
       env = setupEnv(signer, ks2, ctx, com)
       chain = ForkedChainRef.init(com)
       txPool = TxPoolRef.new(com)
@@ -370,7 +370,7 @@ proc rpcMain*() =
       let msgData  = "\x19Ethereum Signed Message:\n" & $msg.len & msg
       let msgDataBytes = @(msgData.toOpenArrayByte(0, msgData.len-1))
       let msgHash = await client.web3_sha3(msgDataBytes)
-      let pubkey = recover(sig, SkMessage(msgHash.bytes)).tryGet()
+      let pubkey = recover(sig, SkMessage(msgHash.data)).tryGet()
       let recoveredAddr = pubkey.toCanonicalAddress()
       check recoveredAddr == signer # verified