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Aegis Docs

Bastion

Bastion is Aegis’s LP protection bot. It opens short futures positions when the LP price approaches or exits the range boundaries, hedging against impermanent loss exposure.

Status: Live and operational.

Strategy Legs

Section titled “Strategy Legs”

Bastion uses two configurable legs, each tied to one side of the LP range:

Leg Trigger Direction
lower_short Price exits below the LP range lower bound Short futures
upper_short Price was above the range and crosses back down through P_upper, re-entering the range from above Short futures (reentry)
  • The lower_short leg triggers exterior to the range — the trigger price is below P_lower by a buffer margin.
  • The upper_short leg triggers at reentry from above — when price was above the LP range and crosses back down through P_upper, re-entering the range from the top.

See Strategy Parameters — Risk Params for the triggerBufferPct mechanics specific to Bastion.

Presets

Section titled “Presets”

All Bastion presets use canonical identifiers from packages/shared/src/strategy-presets.ts:

Preset lower_short upper_short Description
lower_protection Enabled Disabled Protects only against downside exits
full_short_protection Enabled Enabled Full protection: both range boundaries

Parameter Examples

Section titled “Parameter Examples”

Example: lower_protection on ETH/USDC

Parameter Value
Preset lower_protection
Leverage 5x
triggerBufferPct 0.005 (0.5%)
stopLossPct 0.03 (3%)
Capital buffer 20%
Buffer take-profits (bufferTpConfig) TP1 30%/1% · TP2 30%/2% · TP3 40%/3%

With a triggerBufferPct of 0.5%, if P_lower = $2,000, the lower_short leg fires when price falls below $2,000 × (1 − 0.005) = $1,990.

Bastion does not accept takeProfitPct — that field is Vanguard-only. Bastion realizes profit through the buffer take-profits (bufferTpConfig, available only when the capital buffer is greater than 0%) and the escalated take-profit on the upper short (escalatedTpConfig). See Strategy Parameters — Risk Params for the take-profit mechanics.

See Strategy Parameters — Range Bounds for guidance on choosing P_lower and P_upper.

Risk Disclaimer

Section titled “Risk Disclaimer”

Cross-references

Section titled “Cross-references”