add function to import blobs to `ncli_db` (#6166)

* add function to import blobs to `ncli_db`

`ncli_db` does not support importing blobs, making it impossible to
complete the database solely from dumped files. Add the missing support.

* pass `cfg`

ncli/ncli_db.nim

@@ -41,6 +41,7 @@ type
     putState = "Store a given BeaconState in the database"
     dumpBlock = "Extract a (trusted) SignedBeaconBlock from the database"
     putBlock = "Store a given SignedBeaconBlock in the database, potentially updating some of the pointers"
+    putBlob = "Store a given BlobSidecar in the database"
     rewindState = "Extract any state from the database based on a given block and slot, replaying if needed"
     verifyEra = "Verify a single era file"
     exportEra = "Export historical data to era store in current directory"
@@ -129,6 +130,12 @@ type
         name: "set-genesis"
         desc: "Update genesis to this block"}: bool
 
+    of DbCmd.putBlob:
+      blobFile {.
+        argument
+        name: "file"
+        desc: "Files to import".}: seq[string]
+
     of DbCmd.rewindState:
       blockRoot* {.
         argument
@@ -469,6 +476,30 @@ proc cmdPutBlock(conf: DbConf, cfg: RuntimeConfig) =
       if conf.setGenesis:
         db.putGenesisBlock(forkyBlck.root)
 
+proc cmdPutBlob(conf: DbConf, cfg: RuntimeConfig) =
+  let db = BeaconChainDB.new(conf.databaseDir.string, cfg)
+  defer: db.close()
+
+  for file in conf.blobFile:
+    if shouldShutDown: quit QuitSuccess
+
+    let
+      blob =
+        try:
+          SSZ.decode(readAllBytes(file).tryGet(), BlobSidecar)
+        except ResultError[IoErrorCode] as e:
+          echo "Couldn't load ", file, ": ", e.msg
+          continue
+        except SerializationError as e:
+          echo "Malformed ", file, ": ", e.msg
+          continue
+      res = blob.verify_blob_sidecar_inclusion_proof()
+    if res.isErr:
+      echo "Invalid ", file, ": ", res.error
+      continue
+
+    db.putBlobSidecar(blob)
+
 proc cmdRewindState(conf: DbConf, cfg: RuntimeConfig) =
   echo "Opening database..."
   let db = BeaconChainDB.new(conf.databaseDir.string, readOnly = true)
@@ -1167,6 +1198,8 @@ when isMainModule:
     cmdDumpBlock(conf)
   of DbCmd.putBlock:
     cmdPutBlock(conf, cfg)
+  of DbCmd.putBlob:
+    cmdPutBlob(conf, cfg)
   of DbCmd.rewindState:
     cmdRewindState(conf, cfg)
   of DbCmd.verifyEra: