{
 "number": 34698,
 "input_hash": "fafee9503517e9c0",
 "model": "openrouter/google/gemini-3.8-flash",
 "batch": false,
 "created": "2026-09-17T16:17:28+00:00",
 "provider": "Google",
 "stop_reason": "end_turn",
 "usage": {
  "input_tokens": 18788,
  "cache_creation_input_tokens": 0,
  "cache_read_input_tokens": 0,
  "output_tokens": 1825
 },
 "cost_usd": 0.02093475,
 "error": null,
 "result": {
  "display": {
   "goal": [
    "Return a clear error message instead of an internal map exception when spending unconfirmed UTXOs in an oversized mempool cluster."
   ],
   "reviewability": [
    "Ready for review.",
    "Author addressed achow101's architectural suggestions and rebased cleanly."
   ],
   "agreement": [
    "Positive support with addressed feedback (achow101)."
   ],
   "categories": [
    {
     "name": "wallet",
     "why": [
      "P3 because it fixes an edge-case bug where spending from an unconfirmed cluster larger than 500 transactions surfaced an internal map::at exception to users.",
      "Improves user-facing error reporting during coin selection and AvailableCoins without affecting core consensus or wallet fund safety."
     ]
    }
   ]
  },
  "summary": "Handles MiniMiner bump fee calculation failures when unconfirmed outpoints exceed mempool cluster limits. It turns an empty bump-fee map into an explicit error and refactors AvailableCoins to return util::Result<CoinsResult>, propagating an informative error message up through wallet RPCs instead of throwing an out-of-bounds map exception.",
  "problem": "When the mempool cluster size exceeds 500 transactions, MiniMiner's fee calculation gives up and returns an empty map; subsequent indexing via map::at leaks an internal exception to users creating transactions or running sendall.",
  "discussion": {
   "open_concerns": [],
   "resolved_concerns": [
    "achow101 suggested avoiding std::optional in MiniMiner return types, which the author addressed by detecting emptiness in the wallet callers.",
    "achow101 suggested using util::Result<CoinsResult> rather than an error out-parameter for AvailableCoins, which the author adopted in the latest push."
   ],
   "author_status": "active"
  },
  "reviewability": {
   "state": "Ready",
   "label": "Ready",
   "reason": "The author implemented reviewer suggestions from achow101, CI is clean, and there are no unresolved review requests."
  },
  "agreement": {
   "state": "Positive",
   "summary": "Positive; author adopted all suggested changes from achow101, awaiting re-review.",
   "reason": "achow101 provided directional review on error reporting and return types, which the author implemented.",
   "evidence": [
    "achow101 suggested checking !empty() instead of wrapping return in std::optional; author complied.",
    "achow101 suggested returning util::Result<CoinsResult> from AvailableCoins; author implemented in latest rebase."
   ]
  },
  "dependencies": {
   "depends_on": [],
   "enables": []
  },
  "categories": [
   {
    "name": "wallet",
    "member": true,
    "evidence": "Changes wallet fee calculation handling in src/wallet/spend.cpp and updates wallet RPC error handling.",
    "band": "P3",
    "reason_tag": "bug fix",
    "score": 0.35,
    "factors": {
     "security_stability": 1,
     "bug_severity": 1,
     "performance": 0,
     "user_value": 1,
     "leverage": 0
    },
    "rationale": "Fixes issue #29711 where an unhandled map::at exception was exposed to users attempting to spend unconfirmed coins associated with a mempool cluster exceeding the 500-tx limit. While the bug causes a confusing error message, it only occurs in rare high-depth mempool topologies and does not endanger funds."
   },
   {
    "name": "tests",
    "member": false,
    "evidence": "Test adjustments in wallet_spend_unconfirmed.py, mini_miner fuzz target, and benchmarks test wallet logic rather than the test framework.",
    "band": "Unranked",
    "reason_tag": "",
    "score": 0.0,
    "factors": {
     "security_stability": 0,
     "bug_severity": 0,
     "performance": 0,
     "user_value": 0,
     "leverage": 0
    },
    "rationale": "Modifications to tests and benchmarks directly serve the wallet bug fix."
   }
  ],
  "confidence": "high",
  "uncertainties": [],
  "needs": [],
  "card": "This PR fixes issue #29711 by handling MiniMiner bump fee calculation failures when an unconfirmed input belongs to an unconfirmed transaction cluster that exceeds the 500-tx limit. Instead of indexing into an empty map and throwing a map::at exception, the wallet detects calculation failure and AvailableCoins returns util::Result<CoinsResult> with a clear descriptive error. Reviewer achow101 suggested returning util::Result, which the author implemented; the PR is clean, passing CI, and ready for follow-up review."
 },
 "raw_text": null
}