Quoters

All implement IQuoter. SwapPool calls them during swap / quote.

DecimalQuoter

Stateless, no proxy. Implementation is the instance: 0x336f493d5472FD59e9E05128804E2D05Be89c4B7.

1:1 value, scales decimals only. Use when every voucher in the pool is the same unit (e.g. all KES-pegged, mixed 6/18 decimals).

RelativeQuoter

Proxy: yes. Per-token rate in PPM. Unset rate = 1_000_000 (1.0).

out = adjustedValue * inRate / outRate

adjustedValue applies the decimal delta before the rate, so cross-decimal quotes keep precision.

Owner: setPriceIndexValue(token, exchangeRate). Event: PriceIndexUpdated.

OracleQuoter

Proxy: yes. Chainlink AggregatorV3 feeds, all in one quote denomination (typically USD). Cross-rates any pair that shares that denominator.

initialize(owner, baseCurrency)  // baseCurrency is metadata only
setOracle(token, feed)
setOracle(token, feed, maxStaleness)  // 0 → global fallback
setMaxStaleness(seconds)              // default 86400
setMultiplier(ppm)                    // 900_000–1_000_000 inclusive

Missing / stale / non-positive price reverts (OracleNotSet, StaleOraclePrice, InvalidOraclePrice). No fallback rate.

multiplier haircuts every quote. Above parity is rejected (same factor on both legs, so A→B→A would return multiplier²). Uninitialized storage (0) is treated as 1_000_000.