anchor.diff:                  end,
               CallRes = GetCallResult(SenderConnPid),
               CallRes = GetCallResult(AckConnPid),
  -            #{<<"caller_id">>         := CallerId,
  +            #{<<"caller_id">>         := _CallerId,
                 <<"caller_nonce">>      := CallRound,
  -              <<"contract_id">>       := ContractId,
  +              <<"contract_id">>       := _ContractId,
                 <<"gas_price">>         := _,
                 <<"gas_used">>          := _,
                 <<"height">>            := CallRound,
  
positive.code:     ws_mine_key_block(ConnPid, ?NODE, 1),
  
      %% Fetch the pubkey via HTTP
      {ok, 200, #{ <<"pub_key">> := PK }} = get_node_pubkey(),
  
      %% Post spend tx
      {ok, 200, #{<<"tx">> := Tx}} =
  
negative.code: wait_for_key_block_candidate(N) ->
      case rpc(aec_conductor, get_key_block_candidate, []) of
          {ok, Block} -> {ok, Block};
          {error, _Rsn} ->
              timer:sleep(10),
              wait_for_key_block_candidate(N - 1)
      end.
  