linera-io/linera-protocol · error

invalid logs list RLP

Error message

invalid logs list RLP: {e}

What it means

After skipping the three leading fields, the next RLP item — the logs list — failed header decoding. The receipt ends (or corrupts) exactly where the logs list should begin. Raised by decode_receipt_logs; surfaced as Permanent by generate_deposit_proof.

Solutions

1. Ensure the type byte was stripped only once before decoding
2. Use complete canonical receipt bytes from Encodable2718 output
3. For fixtures, build them with the crate's build_test_receipt helpers so the shape is guaranteed valid

match decode_receipt_logs(&receipt_rlp) {
    Err(e) if e.to_string().contains("invalid logs list RLP") => {
        // truncated before logs: re-derive the canonical receipt bytes
    }
    other => other?,
}

When it happens

Trigger: A receipt whose payload ends after the bloom field (no logs list at all); truncated bytes; a stray type byte offsetting the cursor so the logs header is read from the wrong position.

Common situations: Truncated hex; receipts whose type-prefix handling was done twice (stripped once here and once upstream); malformed fixtures.

Related errors

• failed to skip receipt field
• invalid receipt RLP
• invalid log RLP
• invalid RLP item
• logs must be an RLP list

AI-assisted analysis of linera-io/linera-protocol@6c226ddcb3 (2026-08-22). Data as JSON: /api/errors/82fc45f7182ba6bb. Report an issue: GitHub.

Appendix: source

Thrown at linera-bridge/src/proof/mod.rs:402

    let list_header =
        alloy_rlp::Header::decode(&mut data).map_err(|e| anyhow!("invalid receipt RLP: {e}"))?;
    ensure!(list_header.list, "receipt must be an RLP list");

    // Limit reads to the receipt's declared payload.
    ensure!(
        data.len() >= list_header.payload_length,
        "receipt payload extends past available data"
    );
    let mut data = &data[..list_header.payload_length];

    // Skip: status (0), cumulative_gas_used (1), logs_bloom (2)
    for i in 0..3 {
        skip_rlp_item(&mut data).map_err(|e| anyhow!("failed to skip receipt field {i}: {e}"))?;
    }

    // Decode the logs list
    let logs_header =
        alloy_rlp::Header::decode(&mut data).map_err(|e| anyhow!("invalid logs list RLP: {e}"))?;
    ensure!(logs_header.list, "logs must be an RLP list");
    ensure!(
        data.len() >= logs_header.payload_length,
        "logs payload extends past receipt boundary"
    );

    let mut logs_data = &data[..logs_header.payload_length];
    let mut logs = Vec::new();
    while !logs_data.is_empty() {
        logs.push(decode_log(&mut logs_data)?);
    }

    Ok(logs)
}

/// Parses a `DepositInitiated` event from a receipt log.
///
/// Verifies that `topic[0]` matches the event signature, that the log was emitted by

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