9️⃣ Yield (Pendle)

Fuul supports native integrations with Pendle, allowing projects to reward users who hold Yield Tokens (YT) or provide liquidity through LP tokens. Spectra (EVM) and Exponent (Solana) are covered further down the page.

Pendle Basics

Pendle splits yield-bearing assets into two components:

Token	What it represents
YT (Yield Token)	Ownership of the future yield from an underlying asset until maturity
PT (Principal Token)	Ownership of the principal — redeemable for the underlying asset at maturity
LP Token	Liquidity provided to Pendle's AMM pools (PT/SY pairs)
SY (Standardized Yield)	A wrapper that standardizes different yield-bearing assets into a common interface

What You Can Incentivize

Trigger	What's tracked	Use case
Pendle YT	User's SY balance derived from holding YT	Reward users who are betting on yield — incentivize demand for the yield side
Pendle LP	User's LP token holdings (with liquid locker support)	Reward liquidity providers in Pendle AMM pools

How YT Rewards Work

Step	What happens
1. Fetch balances	Fuul queries pre-computed data to get each user's SY (Standardized Yield) balance for the specific Pendle contract
2. Map to users	Each balance is attributed to the user's wallet address
3. Distribute rewards	Rewards are split proportionally based on each user's SY balance relative to the total

How LP Rewards Work

LP rewards track users who provide liquidity to Pendle's AMM pools. Fuul fetches LP token balances — including positions held through liquid lockers — and distributes rewards proportionally.

Setup Requirements

Pendle integrations require 3 contract addresses:

Address	Purpose
YT address	The Yield Token contract
LP address	The LP token contract
SY address	The Standardized Yield contract (needed for balance calculations)

Pendle integrations are available on Ethereum, HyperEVM, and Base. If you need support on additional chains, reach out at [e-mail].

Spectra support

Fuul also supports Spectra, which follows the same yield-splitting model as Pendle (YT/PT/LP). Projects can reward users who hold Spectra YT or provide liquidity through Spectra LP tokens.

Trigger	What's tracked	Use case
Spectra YT	User's underlying balance derived from holding YT	Reward users betting on yield in Spectra markets
Spectra LP	User's LP token holdings in Spectra pools	Reward liquidity providers in Spectra AMM pools

Setup follows the same pattern as Pendle, with contract addresses for the YT, LP, and underlying components. If you need a Spectra integration on a chain that is not currently supported, reach out at [e-mail].

Exponent support (Solana)

Fuul also supports Exponent, the yield-splitting protocol on Solana. Projects can reward users who hold Yield Tokens in an Exponent vault, whichever venue they hold them through.

Trigger	What's tracked	Use case
Exponent YT escrow	YT held in the vault's yield-token escrow	Reward users betting on yield in Exponent markets
Exponent orderbook	YT and SY resting in open limit orders, plus filled but unsettled orders	Reward users providing depth on the vault's orderbook
Exponent CLMM	Liquidity in the vault's concentrated liquidity pool	Reward liquidity providers

Each venue is its own trigger, so a vault can have up to three. Balances are tracked in the vault's SY units and snapshotted on a schedule, like Pendle.

Setup requires one address: the vault address, in base58 exactly as Solana reports it (addresses are case sensitive). Claimable interest on orderbook positions and unclaimed CLMM fees are not counted toward the tracked balance.

Exponent triggers currently support dollar-pegged vaults whose SY has 6 decimals. For other vaults, reach out at [e-mail].