02 / Hooks / volatility-guard
Volatility Guard
Denies routed trades when the venue's on-chain spot price deviates too far from an EMA of routed observations.
01
Behavior
- Spot price is read from on-chain reserves of the bonding curve or PumpSwap pool; no oracle.
- The EMA updates after each routed trade; enforcement starts after a minimum number of observations.
- Small trades below a threshold are not checked.
Limitation. Observations are sparse: they happen on routed trades, so the EMA reflects routed history rather than every Pump trade.
02
Callbacks
ABI v1 · wire values frozen| # | Callback | Subscribable | Default | Semantics |
|---|---|---|---|---|
| 0 | BeforeBuy | yes | Routed buy, before the Pump CPI. Can deny. | |
| 1 | AfterBuy | yes | Routed buy, after the Pump CPI. Sees executed amounts; can still fail the transaction. | |
| 2 | BeforeSell | yes | Routed sell, before the Pump CPI. Can deny. | |
| 3 | AfterSell | yes | Routed sell, after the Pump CPI. | |
| 4 | BeforeSwap | yes | ● | Either side, before the Pump CPI. Can deny. |
| 5 | AfterSwap | yes | ● | Either side, after the Pump CPI. |
| 6 | BeforeLiquidity | reserved | Reserved (wire value 6). | |
| 7 | AfterLiquidity | reserved | Reserved (wire value 7). | |
| 8 | BeforeFeeAction | reserved | Reserved (wire value 8). | |
| 9 | AfterFeeAction | reserved | Reserved (wire value 9). | |
| 10 | OnGraduation | reserved | Reserved (wire value 10). | |
| 11 | OnStrategySignal | reserved | Reserved (wire value 11). |
03
Capabilities
granted at install; enforced by the executor| ■ | READ_MARKET | Read market config, venue reserves and the trade context |
| ■ | VETO_ROUTED_SWAP | Deny a routed trade in a before-callback (reverts the transaction) |
| ■ | WRITE_HOOK_STATE | Persist its 48-byte slot state on the market |
| □ | WRITE_USER_STATE | Update the trading wallet's per-market state |
| □ | AWARD_POINTS | Credit XP / points in the wallet's per-market ledger |
| □ | TREASURY_SIGNAL | Emit treasury allocation intents for the strategy vault |
| □ | STRATEGY_EXECUTION | Bound or request vault strategy execution (TWAP, orders) |
| □ | ORACLE_READ | Read an external oracle account (reserved; not granted in V1) |
| □ | EXTERNAL_CPI | Call an external hook program (reserved; no permissionless CPI hooks in V1) |
| □ | EMIT_SIGNAL | Emit or consume signed strategy signals |
04
Config schema
48 bytes · little-endian| Field | Type | Offset | Unit | Preset | Description |
|---|---|---|---|---|---|
| maxDeviationBps | u32 | 0 | bps | 1500 | Deny when |spot − EMA| / EMA exceeds this |
| emaAlphaBps | u16 | 4 | bps | 2000 | Weight of a new observation in the EMA |
| minObservations | u16 | 6 | count | 5 | Observations before enforcement |
| checkMinQuote | u64 | 8 | lamports | 0.1 SOL | Trades below this are not checked |
| flags | u32 | 16 | flags | 3 | bit0 check buys, bit1 check sells (default both) |
05
Identity
Module ID
3 (0x0003)
Version
v1
Developer
Pump Hooks
Program
91kRNewiED… (built-in)
Priority range
1000–1999 · default 1200
Markets
bonding-curve · pumpswap
Source
crates/hook-runtime/src/modules/volatility_guard.rs
Verification
source in this repository; reproducible-build verification not yet published
Audit
unaudited
06