Epsilon
Alien Base's meta-aggregator and on-chain order engine
Epsilon is Alien Base's trading engine. It has two halves:
The meta-aggregator — the aggregator of aggregators. Every swap quote scans all supported venues on Base and routes through whichever combination delivers the best execution.
The Epsilon Router — the on-chain contract where resting orders (Limit, Take Profit, Stop Loss, Trailing Stop, DCA) live, paired with the Matcher that executes them.
Last updated: July 6, 2026.
The meta-aggregator
For each swap quote, Epsilon:
Pulls live quotes from every integrated DEX and aggregator on Base.
Considers single-hop, multi-hop, and split routes.
Subtracts the fee for each route (gas, pool fees, platform fee).
Returns the best net-of-fees price to the trader.
In nearly every case, the route Epsilon picks beats trading directly on any individual DEX — including Alien Base's own pools — because Epsilon can split a single trade across multiple pools to minimize price impact.
Supported venues
DEX coverage (the venues whose pool liquidity Epsilon can route through):
Alien Base V2 / V3
Native AMM
Uniswap
DEX
Aerodrome
DEX
PancakeSwap
DEX
SushiSwap
DEX
(Other DEXs via aggregators)
Aggregator providers Epsilon can compare quotes against:
OpenOcean
Aggregator
Odos
Aggregator
0x
Aggregator
Bebop
Aggregator
Additional venues are added as Base's liquidity landscape evolves; the routing engine is configured server-side.
The Epsilon Router
The Epsilon Router moves Epsilon's execution logic on-chain. Deployed at 0x303ca5c65AabCb1CE242DF93F478c41E0E4D2580 (verified source on Basescan), it is the contract that holds and settles every resting order:
Limit / Take Profit / Stop Loss / Stop Buy — fixed-price triggers, buy or sell side.
Trailing Stop — a stop level that follows the price up.
DCA — time-sliced execution, with optional trigger price and stop-loss abort.
The Router has been audited by Hexens (final report June 2026, before launch); the full report is published on Audits & Security.
The Matcher
Resting orders don't execute themselves. The Matcher is Epsilon's execution engine: it watches trigger conditions and, when one is met, fills the order through the meta-aggregator — the same best-route logic as a live swap. You pay gas only for approvals, while order creation is gasless. Execution gas is the Matcher's problem.
Fees
Every trade Epsilon executes — swap or resting order — pays a platform fee tiered by asset class, plus the flat 0.05% Protocol execution fee, on top of the underlying pool fees of whichever venues the route touches:
Swap
0.01%
0.05%
0.15%
Limit / Take Profit
0.01%
0.05%
0.10%
Stop Loss / Stop Buy / Trailing Stop / DCA stop-loss
0.10%
0.20%
0.45%
DCA chunk
0.01%
0.10%
0.20%
+ Matcher execution fee (all of the above)
0.05%
0.05%
0.05%
Full breakdown: Fees.
All Epsilon fees accrue to the protocol share — routed to the Treasury and the esALB Real Yield stream.
Explorer (Epsilon Analytics)
Epsilon's data layer also powers the chain-wide Explorer. See Explorer.
See also
Last updated