[Internal transaction] failed to fetch internal transactions for blocks

[hyunsooda]

I deployed the Blockscout platform using the provided Docker Compose setup. However, when an internal transaction occurs on the chain, I encounter the following error. The connected endpoint is the Kaia network.

Below are my environment variables:

environment:
    ETHEREUM_JSONRPC_VARIANT: 'geth'
    ETHEREUM_JSONRPC_HTTP_URL: ${RPC_URL:-http://host.docker.internal:8553/}
    ETHEREUM_JSONRPC_TRACE_URL: ${RPC_URL:-http://host.docker.internal:8553/}
    ETHEREUM_JSONRPC_WS_URL: ${WS_URL:-ws://host.docker.internal:8653/}
    8653N_ID: ${CHAIN_ID:-949494}
    INDEXER_DISABLE_PENDING_TRANSACTIONS_FETCHER: 'true'
    INDEXER_DISABLE_EMPTY_BLOCKS_SANITIZER: 'true'
    INDEXER_INTERNAL_TRANSACTIONS_TRACER_TYPE: 'js'
    INDEXER_CATCHUP_BLOCK_INTERVAL: '1s'
    LOG_LEVEL: 'warn'

Error:

{"time":"2025-07-17T02:20:08.470Z","severity":"error","message":"failed to fetch internal transactions for blocks [160, 153, 162]: ** (ErlangError) Erlang error: [%{code: -32000, data: %{block_number: 153, transaction_hash:"0x151a82a5ff7bd1f3a343ab889d29cba2280f95712d123d5df5602541d0535776", transaction_index: 0},message: "TypeError: undefined not callable (property 'length' of [object Object]) in server-side tracer function 'step'"}]","metadata":{"count":3,"fetcher":"internal_transaction","error_count":3}}

Reference: #6567 (A simliar issue was found on the same chain(Kaia))

Thank you.

[hyunsooda]

Once I changed the config INDEXER_INTERNAL_TRANSACTIONS_TRACER_TYPE=callTracer, the following error appears.

{"time":"2025-07-17T03:50:15.868Z","severity":"error","message":"failed to fetch internal transactions for blocks [20, 491, 496, 499, 1968, 1976, 1978, 2051, 2052, 2053]: ** (BadMapError) expe
cted a map, got: {"calls", [%{"from" => "0x18b3f24ed1a9efbe6168344e04a52e1e9ada7667", "gas" => "0x1466", "gasUsed" => "0x1466", "input" => "0x371303c0", "to" => "0xe8b9017
d0bfb4fe106ab199c68c5209acbb112ec", "type" => "CALL", "value" => "0x0"}]}\n (ethereum_jsonrpc 7.0.2) lib/ethereum_jsonrpc/geth.ex:354: anonymous fn/4 in EthereumJSONRPC.Geth.debug_
trace_transaction_response_to_internal_transactions_params/2\n (elixir 1.17.3) lib/enum.ex:1711: anonymous fn/3 in Enum.map/2\n (elixir 1.17.3) lib/enum.ex:4423: anonymous fn/3 in Enum.m
ap/2\n (elixir 1.17.3) lib/stream.ex:1879: anonymous fn/3 in Enumerable.Stream.reduce/3\n (elixir 1.17.3) lib/stream.ex:1209: anonymous fn/3 in Stream.with_index/2\n (elixir 1.17.3) l
ib/enum.ex:4858: Enumerable.List.reduce/3\n (elixir 1.17.3) lib/stream.ex:1891: Enumerable.Stream.do_each/4\n (elixir 1.17.3) lib/enum.ex:4423: Enum.map/2\n","metadata":{"count":10,"fetc
her":"internal_transaction","error_count":10}}

[ekawibisono]

Hello @hyunsooda , do you want to turn on internal transactions or just turn them off?