Arbitrum

Umbra is a protocol that lets you get paid privately on Ethereum and Layer 2 networks. ## About Umbra As a protocol, Umbra defines a simple set of standards, coupled with a singleton smart contract instance, to enable stealth addresses on Ethereum. With a stealth address, a payer can send Ether or ERC20 tokens to an address controlled by the receiver, but no one except the two parties know who that receiver is. On chain, the transaction looks like a simple transfer to an otherwise unused…

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