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security(block-producer): allowlist device_info on public /block/producers (keep endpoints public) #6755

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Merged
Scottcjn merged 1 commit into from
Jun 1, 2026
Merged

security(block-producer): allowlist device_info on public /block/producers (keep endpoints public) #6755

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13 changes: 12 additions & 1 deletion node/rustchain_block_producer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,10 @@

GENESIS_TIMESTAMP = 1764706927 # Production chain launch (Dec 2, 2025)
BLOCK_TIME = 600 # 10 minutes (600 seconds)

# Public allowlist for /block/producers device_info (prevents future
# fields leaking through this unauthenticated endpoint).
_DEVICE_PUBLIC_FIELDS = ("arch", "family", "model", "year", "enroll_weight")
MAX_TXS_PER_BLOCK = 1000
ATTESTATION_TTL = 600 # 10 minutes
MAX_BATCH_BLOCKS = 100
Expand Down Expand Up @@ -1093,6 +1097,11 @@ def list_producers():
current_ts = int(time.time())
miners = producer.get_attested_miners(current_ts)

# Intentionally PUBLIC consensus transparency. device_info is exposed via
# an explicit field allowlist so a future column added to it (e.g. an
# IP/hostname) can never leak through this unauthenticated endpoint.
# Behaviour for current data is unchanged (these are the only fields
# device_info carries); a non-dict/None row degrades to {} instead of 500.
return jsonify({
"count": len(miners),
"balance": producer.get_producer_balance_summary(
Expand All @@ -1104,7 +1113,9 @@ def list_producers():
"wallet": m[0],
"arch": m[1],
"selection_weight": producer._miner_selection_weight(m),
"device_info": m[2]
"device_info": {
k: m[2].get(k) for k in _DEVICE_PUBLIC_FIELDS
} if isinstance(m[2], dict) else {},
}
for m in miners
]
Expand Down
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