Hodlmm Arb Executor

HODLMM Arb Executor

What it does

Detects price spreads between Bitflow XYK pool and HODLMM (DLMM) for sBTC/STX, then executes LP-based arb via MCP command objects. Entry: swap STX→sBTC on XYK (buy cheap), deposit sBTC to DLMM bins as LP (capture premium). Exit: withdraw LP from DLMM, swap sBTC→STX. Exit triggers: spread reversal or 2-hour max hold.

All execution is write-capable. --confirm is required for live MCP command emission. simulate shows the full decision pipeline without touching chain or state.

Why agents need it

Agents running sBTC/STX strategies need a way to act on spread signals, not just observe them. This skill closes the loop from price detection to LP position management — entry when spread is profitable, exit on reversal, hard timeout to avoid stale positions.

On-chain proof

Live execute --confirm --max-sats 10000 run on 2026-04-07T16:32Z demonstrated full pipeline against mainnet:

• Pyth: BTC=$68,347 STX=$0.2149 | age 1s ✅
• Hiro XYK: 317,086 STX/BTC | $1.31M TVL ✅
• Bitflow HODLMM (dlmm_6): 311,100 STX/BTC | active bin 308 ✅
• Spread: 1.93% gross / 1.38% net — profitable: true ✅
• STX amount: 32.3 STX for 10,000 sats at live oracle price ✅
• entryBinId: 309 = activeBin 308 + 1 ✅
• State: openPosition written, cooldown stamped ✅

On-chain swap tx (STX→sBTC via Bitflow XYK, wallet SP1KNKVXNNS9B6TBBT8YTM2VTYKVZYWS65TTRD430): a34388332765330ff0299e598757078c7512c0db8dfd7dd96737b6ba9753e424 — SUCCESS (ok u10064) — 10,064 sats sBTC received. Explorer: https://explorer.hiro.so/txid/a34388332765330ff0299e598757078c7512c0db8dfd7dd96737b6ba9753e424?chain=mainnet

Post-conditions: STX eq 32,300,024 micro-STX (debit from wallet) + sbtc-token gte 9,850 sats (sent from pool). 32.3 STX debited, 10,064 sats received. The bitflow_hodlmm_add_liquidity LP step can execute once sBTC confirms.

HODLMM integration

Uses bitflow_hodlmm_add_liquidity for entry and bitflow_hodlmm_withdraw_liquidity for exit. Targets dlmm_6 (SM1FKXGNZJWSTWDWXQZJNF7B5TV5ZB235JTCXYXKD.dlmm-pool-stx-sbtc-v-1-bps-15, the STX/sBTC DLMM pool). Bonus-eligible for HODLMM integration prize.

Safety notes

• Hard spend cap: MAX_AUTONOMOUS_SATS = 100_000 (~$85 at $85k BTC) hardcoded in source constants — not just documentation.
• --confirm required: All write paths require --confirm. Without it: CONFIRM_REQUIRED status, no state changes.
• Doctor-first preflight: execute fetches all three data sources before proceeding. Aborts with PREFLIGHT_FAILED if any source is unreachable.
• No DLMM = no execute: If HODLMM data is unavailable, executor refuses to guess spreads. Returns PREFLIGHT_FAILED.
• Cooldown guard: lastExecutionAt is only stamped when cmds.length > 0. No-op runs (nothing to execute) never consume the cooldown window.
• Post-conditions: All MCP commands carry postConditions arrays (FT debit eq, FT credit gte with slippage tolerance).
• 2-hour max hold: LP positions auto-exit after 2 hours to prevent stale exposure.
• Oracle confidence buffer: profitable flag requires net spread > (oracle.confidence.stx / oracle.stxUsd) * 100 — not just net spread > 0.
• No credential passthrough: Skill does not accept --wallet-password. Unlock wallet before calling.

Commands

doctor

Preflight check: all data sources + cooldown + open position. Run before execute.

bun run hodlmm-arb-executor/hodlmm-arb-executor.ts doctor

simulate

Dry-run. Shows exact commands, amounts, decision logic. No --confirm needed. No state changes.

bun run hodlmm-arb-executor/hodlmm-arb-executor.ts simulate [--max-sats 100000]

execute

Full pipeline. Requires --confirm to emit live MCP commands.

bun run hodlmm-arb-executor/hodlmm-arb-executor.ts execute [--confirm] [--max-sats 100000]

watch

Continuous monitoring. Read-only. Alerts when spread exceeds threshold.

bun run hodlmm-arb-executor/hodlmm-arb-executor.ts watch [--interval 60] [--min-spread 0.3] [--max-scans 60]

Output contract

All outputs are JSON to stdout.

doctor:

{
  "network": "mainnet",
  "status": "ok | error",
  "checks": [
    { "name": "pyth_hermes", "status": "ok | error", "detail": "BTC=$85000 STX=$0.21 | age 3s | conf STX=$0.000210" },
    { "name": "hiro_xyk_pool", "status": "ok | error", "detail": "296000 STX/BTC | $1.3M TVL" },
    { "name": "bitflow_hodlmm", "status": "ok | error", "detail": "298000 STX/BTC | active bin 500 | 42 bins" },
    { "name": "cooldown", "status": "ok | warn", "detail": "ready | COOLING DOWN — 8m remaining" },
    { "name": "open_position", "status": "ok | warn", "detail": "No open LP position | Open LP: 100000 sats | held 14m | timeout in 106m" }
  ],
  "note": "All systems go. | PREFLIGHT_FAILED — fix errors before running execute.",
  "maxAutonomousSats": 100000,
  "timestamp": "2026-03-30T12:00:00.000Z"
}

simulate:

{
  "network": "mainnet",
  "mode": "simulate",
  "pair": "sBTC/STX",
  "oracle": { "btcUsd": 85000, "stxUsd": 0.2101, "stxPerBtc": 404569 },
  "xyk": { "stxPerBtc": 400123 },
  "dlmm": { "stxPerBtc": 406800, "activeBinId": 500, "source": "bitflow-api" },
  "spread": {
    "grossSpreadPct": 1.6636,
    "estFeePct": 0.55,
    "netSpreadPct": 1.1136,
    "confidenceBuffer": 0.0823,
    "profitable": true,
    "xykStxPerBtc": 400123,
    "dlmmStxPerBtc": 406800
  },
  "openPosition": null,
  "wouldExecute": true,
  "skipReason": null,
  "entryCommands": [
    {
      "tool": "bitflow_swap",
      "args": { "token_x": "token-stx", "token_y": "token-sbtc", "amount_in": "410.14", "slippage_tolerance": "0.015" },
      "description": "Swap 410.14 STX for ~0.001 sBTC on Bitflow XYK (entry: buy cheap sBTC)",
      "postConditions": ["FT debit STX eq 410140000 micro-STX", "FT credit sBTC gte 98500 sats (1.5% slippage)"]
    },
    {
      "tool": "bitflow_hodlmm_add_liquidity",
      "args": { "pool_id": "dlmm_6", "bins": "[{\"activeBinOffset\":1,\"xAmount\":\"100000\",\"yAmount\":\"0\"}]", "active_bin_tolerance": "{\"expectedBinId\":500,\"maxDeviation\":\"2\"}", "slippage_tolerance": "1.5" },
      "description": "Add 0.001 sBTC to DLMM pool dlmm_6 bin +1 (LP entry at premium)",
      "postConditions": ["FT debit sBTC eq 100000 sats", "LP tokens credited for pool dlmm_6"]
    }
  ],
  "maxSats": 100000,
  "cooldownRemainingMs": 0,
  "timestamp": "2026-03-30T12:00:00.000Z"
}

execute — CONFIRM_REQUIRED:

{
  "status": "CONFIRM_REQUIRED",
  "message": "Add --confirm to authorize MCP command emission.",
  "network": "mainnet",
  "note": "Max spend: 100000 sats (hard cap: 100000 sats)",
  "timestamp": "2026-03-30T12:00:00.000Z"
}

execute — ENTRY_COMMANDS_EMITTED:

{
  "status": "ENTRY_COMMANDS_EMITTED",
  "network": "mainnet",
  "spread": { "grossSpreadPct": 1.6636, "netSpreadPct": 1.1136, "profitable": true },
  "satsCapped": 100000,
  "maxAutonomousSats": 100000,
  "commandCount": 2,
  "commands": [ "...same as simulate entryCommands..." ],
  "openPosition": { "entryTimestamp": "...", "entrySpreadPct": 1.6636, "entryBinId": 500, "satsSent": 100000, "estimatedEntryUsd": 85.0 },
  "timestamp": "2026-03-30T12:00:00.000Z"
}

execute — SKIPPED:

{
  "status": "SKIPPED",
  "reason": "SPREAD_NOT_PROFITABLE | SPREAD_TOO_SMALL | COOLDOWN_ACTIVE | DLMM_UNAVAILABLE",
  "spread": { "...": "..." },
  "message": "descriptive message",
  "timestamp": "2026-03-30T12:00:00.000Z"
}

execute — PREFLIGHT_FAILED:

{
  "status": "PREFLIGHT_FAILED",
  "error": "API error 503 at https://api.hiro.so/...",
  "network": "mainnet",
  "timestamp": "2026-03-30T12:00:00.000Z"
}

watch — compact poll:

{ "scan": 1, "alert": false, "xykStxPerBtc": 400123, "dlmmStxPerBtc": 406800, "grossSpreadPct": 1.66, "openPosition": "no", "timestamp": "..." }

watch — alert:

{ "scan": 3, "alert": true, "network": "mainnet", "pair": "sBTC/STX", "spread": { "..." }, "openPosition": null, "timestamp": "..." }

Error:

{ "error": "descriptive message" }

Known constraints

• DLMM data required for execute — degrades to read-only if Bitflow API is unavailable.
• bitflow_swap auto-routes — cannot force a specific pool. SDK determines the route.
• Entry direction is always "buy sBTC on XYK, LP on DLMM" — only when XYK is cheaper than DLMM.
• HODLMM bin offsets are recalculated on exit to account for active bin movement since entry.
• Fee estimates are static (XYK 30bps, DLMM 25bps). Actual HODLMM fees vary by bin distance.
• State is stored locally in ~/.hodlmm-arb-executor-state.json.

Origin

Winner of AIBTC x Bitflow Skills Pay the Bills competition. Original author: @ronkenx9 Competition PR: https://github.com/BitflowFinance/bff-skills/pull/379