SushiSwap moved more than $800 million in liquidity from Uniswap

SushiSwap completed the migration of more than $800 million in estimated cryptocurrency liquidity from Uniswap into its own automated-market-maker contracts on September 9, 2020. The transfer gave the two-week-old protocol an independently operating exchange after it had used SUSHI token rewards to attract deposits represented by Uniswap liquidity-provider tokens.

The development mattered because it demonstrated that an open-source decentralized exchange could be copied and then challenged through different economic incentives. Users did not merely move to another website. Assets supporting markets on Uniswap were withdrawn through Ethereum transactions and supplied to newly created SushiSwap pools.

The dollar figure was a point-in-time valuation of deposited crypto assets, not a cash payment or audited balance-sheet amount. CoinDesk described approximately $830 million at the beginning of the process, while The Block reported more than $800 million. Prices were changing continuously, and neither report supplied a complete venue-by-venue pricing methodology.

The migration on Ethereum

Testing began at approximately 14:15 UTC on September 9 before the remaining pools were processed. Ethereum records show successful calls to the `migrate(uint256)` function at SushiSwap’s MasterChef contract, 0xc2EdaD668740f1aA35E4D8f227fB8E17dcA888Cd.

A transaction confirmed at 16:04:38 UTC called that function for pool 17 and removed CRV-and-ether liquidity from a Uniswap V2 pool before supplying the corresponding assets to a SushiSwap pool. The verified MasterChef source code explains the mechanism: the contract approved a designated migrator to take its Uniswap liquidity-provider tokens, required the migrator to return an equal quantity of newly issued SushiSwap liquidity-provider tokens and then replaced the pool’s recorded token address.

That transaction is primary evidence of the procedure, but it represents one pool rather than the aggregate dollar total. Contemporaneous reports tracked the wider sequence as pools were migrated separately. At 19:10 UTC, interim project leader Sam Bankman-Fried publicly marked the operation complete.

How incentives redirected liquidity

SushiSwap had been deployed on August 28 as a fork of Uniswap. Liquidity providers could deposit Uniswap V2 pool tokens into MasterChef and earn newly issued SUSHI. The promised economics also allocated 0.25% of each trade to active liquidity providers and 0.05% for conversion into SUSHI and distribution to SUSHI holders.

Those incentives produced what became known as “vampire mining”: a new protocol used token rewards to attract positions associated with an incumbent and then migrated the underlying liquidity into competing markets. CoinGecko’s subsequent third-quarter report dated the transfer to September 9 and placed it above $800 million.

The event did not show that all of the migrated capital represented durable demand for SushiSwap. Depositors were responding partly to temporarily elevated token issuance, while total value locked depended on volatile asset prices and could reverse without assets being lost. It also did not establish that SUSHI had a defensible valuation.

Governance remained unresolved

The technical completion followed an abrupt leadership crisis. The pseudonymous founder known as Chef Nomi had converted tokens from the development allocation into ether and then transferred control to Bankman-Fried. On September 9, selection of a multisignature group intended to succeed that interim arrangement was still part of the transition.

Consequently, descriptions of SushiSwap as fully community-controlled were aspirational on the event date. The verified contract source itself warned that the owner possessed substantial power until ownership could be transferred to a governance contract. Successful migration established that the software and incentive campaign could redirect liquidity; it did not settle governance legitimacy, contract security or the durability of the new exchange.

For Uniswap, the episode exposed the limits of relying on open-source code and existing liquidity as competitive defenses. For decentralized finance more broadly, September 9 established that protocol market structure could change in hours through composable contracts, transferable pool positions and governance-token rewards—without an acquisition agreement or centralized exchange operator directing the transfer.