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Liquid staking protocol Lido Finance has pushed the big red button in order to activate a protocol safety feature called “Staking Rate Limit” after more than 150,000 Ether was staked with the protocol in a single day.

Lido is a liquid staking solution for digital assets, in this case allowing users to stake Ether (ETH) without them needing to have their tokens locked. When a user deposits Ether, Lido issues them a liquid variant of ETH, known as staked ETH (stETH), giving users staking rewards for each day the tokens are held in their wallets.

According to the liquid staking protocol’s Feb. 25 tweet, the “dynamic mechanism” was activated after the daily staking limit of 150,000 Ether was reached.

In a related guide, Lido explained that the “safety valve” is aimed at limiting the amount of staked ether (stETH) that can be minted during times of high inflows, which is intended to address the possible ill side effects, such as rewards dilution.

“This means it is only possible to submit this much ether to the Lido staking contracts within a 24-hour timeframe,” it explained.

The mechanic works by limiting the amount that can be minted based on deposits within the last 24 hours, replenishing capacity at the rate of 6,200 Ethereum (ETH) per hour.

“It works by decreasing how much total stETH can be minted at any one time based on recent deposits, and then replenishing this capacity on a block-by-block basis,” Lido said.

Lido noted the Staking Rate Limit mechanism would affect “all parties who may try to mint stETH, regardless of approach.”

Eagle eyed on-chain analyst Lookonchain shared a screenshot reportedly showing that the 150,100 ETH may have come from a single user, with three deposits 50,000 each, and one of 100.

Caption: An on-chain analyst has discovered that 150,100 ETH may have come from a single user. Source: DeBank

According to Lido Finance’s website, as of Feb. 27, more than $8.9 billion ETH has been staked with the protocol, up significantly from the $5.8 billion reported on Jan. 2. 

Related: SEC’s crypto staking crackdown has uncertain consequences for DeFi: Lido Finance

The latest development from Lido comes as Ether staking volumes have reportedly continued to rise as the Shanghai upgrade nears. The Ethereum Shanghai upgrade or the “Ethereum Shanghai fork,” is due in mid-March, leading to speculation about what could happen to the ETH price.

One of the five planned upgrades, EIP-4895, is expected to unlock staked ETH and allow withdrawals, potentially leading to increased liquidity in the crypto market.

$25 billion of ETH has been staked since the Beacon Chain was launched and introduced staking to ETH in December, 2020.