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Uniswap (UNI) introduced TJAR, a Token Jar system that lets apps collect fees in one chosen token across seven chains.
Uniswap (UNI) has launched TJAR, an onchain fee-conversion system designed to let applications collect revenue in whatever tokens users pay with and settle those fees in a single asset of their choosing, according to the company’s Oct. 29, 2026 announcement. The framework is intended to reduce the need for custom fee-conversion infrastructure while giving apps a way to direct proceeds to a treasury, bridge or burn address.
How the Token Jar system works
In Uniswap’s description, an app selects the token it wants to receive, sets a price and chooses a destination. Fees accumulate in a Token Jar in the assets received from users, and searchers compete to convert that basket into the chosen token. Once the jar is released, the selected token is delivered to the destination set by the app. Uniswap said the setup can be deployed in a single transaction and that settings such as token, price and destination can be changed later unless they are locked permanently.
Reported usage and scale
Uniswap said TJAR is live across seven chains and that more networks are planned. The company also said the Token Jar framework was first built for Uniswap Protocol fees and processed more than $15.3 million in conversions last month. Those figures were presented by Uniswap in its announcement and are not independently verified in the provided material.
Uniswap said Robinhood is already using TJAR across its supported chains for fees collected through the Uniswap API, with converted proceeds paid out in USDC and USDG. The same infrastructure, the company said, is available for any app, hook, chain or API integration that takes fees.
Context and limitations
The underlying protocol-fee architecture is consistent with Uniswap’s developer documentation, which describes fee adapters routing assets to a chain-specific immutable TokenJar and an authorized Releaser handling withdrawal. The documentation also notes that the simplest protocol implementation exchanges collected assets for burning UNI. That burn mechanism should not be conflated with every application’s fee-conversion configuration, since TJAR can be directed to other destinations depending on how an app sets it up.
No live token market data was supplied for TJAR, and the provided material does not include independently verified onchain measurements for the reported conversion volume or adoption figures.
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