stake.link v0.3: What Changed and Why It Matters

The Evolution of stake.link

stake.link was founded by LinkPool — one of the earliest and most established node operators in the Chainlink ecosystem, and the protocol's #4 validator on Espresso. Since launching stLINK in September 2022, the protocol has grown from a single-asset liquid staking product into a multi-asset, cross-chain staking infrastructure layer. That trajectory — from LINK-only to LINK + POL + ESP — is what the v0.3 era represents.

The protocol has operated continuously for over three years with zero security incidents, completing five independent security audits and growing to over $60M TVL. Each protocol version has added capability without disrupting existing stakers: positions carry forward automatically, and new asset support is additive rather than requiring migration.

The timeline below captures the key milestones that brought stake.link to its current state as a multi-chain, multi-asset liquid staking protocol governed by SDL token holders through on-chain governance (Snapshot + SLURP process).

Multi-Asset Liquid Staking

The defining feature of stake.link v0.3 is native support for multiple assets within the same protocol architecture. Rather than building separate protocols for each staked asset, stake.link extends the same staking infrastructure — node operator network, community pool mechanism, and governance — to cover additional tokens. This means LINK stakers and ESP stakers benefit from shared security, shared governance, and shared fee revenue flowing to SDL lockers.

Each supported asset issues its own liquid staking token: stLINK for LINK, stPOL for Polygon's POL token, and stESP for Espresso. All three are rebasing ERC-20 tokens that accrue rewards in their respective denominations. All three have corresponding non-rebasing wrappers (wstLINK, wstPOL, wstESP) for DeFi protocol compatibility.

The performance fee structure applies per asset. The NOP Pool fee is 26% total (5% to node operators, 15% to SDL stakers, 3% DeFi-PoL, 3% core contributors). The Community Pool fee is 16% total (10% to SDL stakers, 3% DeFi-PoL, 3% core contributors). This creates a direct link between protocol expansion and SDL token value — each new staked asset adds a new fee stream. POL staking launched in June 2024; ESP staking went live in March 2026 following SLURP-61 governance approval.

From a staker perspective, you interact with each asset independently: deposit LINK → receive stLINK, deposit ESP → receive stESP. Positions are not commingled. The multi-asset architecture is coordination infrastructure, not pooling.

Cross-Chain Expansion via CCIP

stake.link's cross-chain strategy is built entirely on Chainlink CCIP, which provides canonical cross-chain messaging with cryptographic finality guarantees. Rather than using a custom bridge or third-party relayer, the protocol uses the same infrastructure it helps secure — a deliberate alignment between stake.link's economic interest and the security of the bridge.

The WrappedTokenBridge contract handles the full cross-chain flow atomically: when a user bridges stLINK from Ethereum, the contract wraps it to wstLINK and sends the CCIP message in a single transaction. On the destination chain, the user receives wstLINK — the non-rebasing form required for DeFi compatibility across chains. This design avoids the accounting complexity of rebasing tokens in cross-chain environments.

Cross-chain expansion matters for DeFi composability. By making wstLINK available on Arbitrum and Base, stake.link positions staked LINK as collateral and liquidity across the multi-chain DeFi landscape — not just on Ethereum mainnet. The same wstLINK used in Morpho on Ethereum can be bridged to Arbitrum for Camelot liquidity provision or Folks Finance lending.

Chainlink BUILD Integration

stake.link is integrated with the Chainlink BUILD program, which distributes fee rewards from partner protocols to stakers who hold eligible positions. BUILD is Chainlink's mechanism for aligning ecosystem growth with staker incentives — protocols get access to Chainlink services, and stakers receive a share of the partner protocol's tokens.

Season Genesis included 200 million SXT tokens distributed to eligible stakers. Season 1 expanded the program to nine projects, five of which passed the dust threshold for meaningful distribution. As a stake.link staker, your stLINK position makes you eligible for BUILD reward distributions automatically — no separate registration or action is required.

BUILD rewards represent an additional yield layer on top of the core Chainlink staking APY. The exact value depends on the participating protocol's token price and the distribution schedule for each season. Distributions are tracked and claimable through the stake.link interface when BUILD seasons are active.

ESP and the Three-LST Strategy

The addition of stESP in March 2026 completes what can now be called the three-LST strategy: liquid staking for three distinct infrastructure layers — Chainlink oracle networks (LINK), Polygon's validator set (POL), and Espresso's HotShot BFT consensus (ESP). Each represents a different segment of blockchain infrastructure, and stake.link provides liquid exposure to all three through the same protocol interface.

ESP staking unbonding varies based on protocol queue and liquidity conditions, consistent with Espresso's native unbonding design. The stESP token rebases as HotShot consensus rewards accrue. For DeFi interactions, wstESP (the non-rebasing wrapper) is available for compatible protocols. LinkPool operates as a validator on the Espresso network — ranked #4 — which provides the protocol with direct operational context for ESP staking parameters and uptime guarantees.

The three-LST strategy is significant because it transforms stake.link from a LINK-specific product into a broader infrastructure staking hub. The SDL governance token and its lockers now sit above three distinct staking economies, collecting fees from all three. This diversifies the protocol's revenue base and reduces dependence on a single asset's participation rate and staking cap dynamics.

What This Means for Stakers

For existing LINK stakers, the v0.3 upgrades require zero action. Your stLINK position continues to earn Chainlink staking rewards, BUILD distributions when active, and any SDL boost from locked reSDL positions. The multi-asset additions and cross-chain expansions do not affect LINK staking mechanics, the 45.3M LINK staking cap, or the unbonding period (28 days, or instant via Curve).

For SDL lockers and reSDL holders, the expansion is directly positive: each new staked asset adds a 16% community fee stream flowing to SDL lockers. Three staked assets means three independent yield sources that denominate in LINK, POL, and ESP respectively — alongside SDL token governance rights and boost mechanics on LINK staking positions.

For new stakers evaluating the protocol, v0.3 presents a mature, audited infrastructure with over three years of operation and zero security incidents. The cross-chain availability of wstLINK on Arbitrum, Base, and Polygon means staked LINK can participate in DeFi across the ecosystem — Morpho, Camelot, Folks Finance, Beefy, and Uniswap are all integrated. The pipeline to Aave V3 (via pending AIP after ARFC passage) would further expand collateral reach.

The overall picture is a protocol that has shipped consistently — one major milestone roughly every six months since launch — without a single security incident, while expanding the surface area for staker yield and DeFi composability at each step.