Transactions and Users

• Pulled Umbra transactions from arbitrum.core.fact_event_logs table where contract_address = 0xfb2dc580eed955b528407b4d36ffafe3da685401. Users are the senders.
• Pulled Tornado Cash transactions from arbitrum.core.fact_event_logs table where contract_address in(‘0x84443CFd09A48AF6eF360C6976C5392aC5023a1F', '0xd47438C816c9E7f2E2888E060936a499Af9582b3', '0x330bdFADE01eE9bF63C209Ee33102DD334618e0a', '0x1E34A77868E19A6647b1f2F47B51ed72dEDE95DD'). Users are the receivers.
• Determined $USD using daily average ETH price fromarbitrum.sushi.ez_swaps

Total Created Umbra Stealth Keys

• Pulled from arbitrum.core.fact_transactions table where contract_address = 0x31fe56609C65Cd0C510E7125f051D440424D38f3

• Example Transaction:

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Background

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• US Treasury issues sanctions against Tornado Cash on August 8th, 2022:
• Umbra crypto launched on Arbitrum on April 7th, 2022:
• The purpose of this analysis is to understand the usage of two of the most popular privacy payment apps on Arbitrum, Tornado Cash & Umbra, and how the U.S. sanctions on Tornado Cash impacted usage.

Key Findings

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• Tornado Cash usage (users, $USD volume and transaction count) has declined on Arbitrum post sanctions, however, Umbra usage does not seem to have been impacted.
• Umbra has more users and transactions, but $USD volume is about equal to Tornado Cash. This could be a result of Tornado Cash having fixed transaction sizes of 0.1, 1, 10 and 100 ETH.
• More Umbra users have created keys to receive Umbra than have sent funds using, so more repeated senders than receivers.

Author

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Twitter: @primo_data

Discord: primo_data#1487

Arbitum is a layer 2 Ethereum scaling technology built by Offchain Labs.

Website:

Twitter: @arbitrum

Umbra is an app available on multiple chains used to transfer money and hide the receiver address from public blockchain data for privacy purposes.

Website:

Twitter: @UmbraCash

Tornado Cash is an app available on multiple chains used to transfer money and hide the sender address from public blockchain data for privacy purposes.

Twitter: @TornadoCash