DNA Provenance

GasHammer embeds provenance markers at every layer — binaries, HTTP traffic, on-chain calldata, telemetry storage, and source files. These markers enable attribution, auditing, and forensic identification.

Ref: RFC-0011.

Binary Canary

Every GasHammer binary contains a canary string in the .rodata section:

GasHammer — Adversarial load testing for rollup infrastructure.
Copyright (c) 2025-present Don Johnson.
https://github.com/copyleftdev/gashammer.
Licensed under BSL-1.1.

This string survives strip, UPX compression, and Docker layer squashing. Detect it with:

strings <binary> | grep GasHammer

The canary is defined as GASHAMMER_CANARY in gashammer-common/src/build_info.rs.

Build Metadata

Every binary embeds structured build metadata, accessible via --version:

HTTP Headers

Every outbound HTTP and WebSocket request includes:

The hive REST API also returns X-Powered-By on every response.

On-Chain Markers

Calldata Magic Bytes

Every transaction generated by the workload engine includes the magic bytes 0x47484D52 (“GHMR”) in the calldata. This enables on-chain identification of GasHammer-generated transactions.

Defined as CALLDATA_MAGIC: [u8; 4] = [0x47, 0x48, 0x4D, 0x52] in gashammer-workload/src/templates.rs.

Account Derivation Path

Test accounts use the HD derivation path:

m/44'/60'/0'/0'/0x4748/{index}

The 0x4748 segment encodes “GH” (GasHammer) in hex. This makes the derivation path itself a provenance marker. Defined as DERIVATION_MARKER: [u8; 2] = [0x47, 0x48] in gashammer-workload/src/account.rs.

Telemetry Storage

Parquet file footers include metadata fields:

Prometheus Metrics

All metrics use the gashammer_ prefix. This is enforced by convention and verified in tests.

Source Files

Every .rs file includes the BSL-1.1 license header:

#![allow(unused)]
fn main() {
// Copyright (c) 2025-present Don Johnson
// Licensed under the Business Source License 1.1 (the "License");
// ...
}

This is enforced by scripts/check-license-headers.sh in CI.

Docker Images

Container images include OCI labels:

Summary