Method :

I used ethereum.core.ez_token_transfers and ethereum.core.ez_token_transfers for extracting ETH and USDC inflows and outflows Data.

Ethereum To Optimism Contract = 0x99c9fc46f92e8a1c0dec1b1747d010903e884be1.

Optimism To Ethereum Contract = 0x25ace71c97b33cc4729cf772ae268934f7ab5fa1.

• The number of bridges from Ethereum to Optimism in all weeks has been more than the number of bridges from Optimism to Ethereum. The number of bridges from Ethereum to Optimism peaked in early September 2021.
• The total number of bridges from Ethereum to Optimism: 214 thousand transactions.
• The total number of bridges from Optimism to Ethereum: about 6500 transactions.
• The number of wallets that have transferred their holdings from Ethereum to Optimism.

• The volume of ETH transfers from Ethereum to Optimism has been increasing over time and peaked in the first week of August.
• Total ETH volume inflows outflows :
  • Ethereum to Optimism : 312K ETH.
  • Optimism to Ethereum : 93.7K ETH.
• Median ETH bridged amount :
  • Ethereum to Optimism : 152 ETH.
  • Optimism to Ethereum : 3K ETH.
• Average ETH volume inflows and outflows :
  • Ethereum to Optimism : 47.6 ETH.
  • Optimism to Ethereum : 1.58 ETH.
• Maximum ETH bridged amount :
  • Ethereum to Optimism : 19.9K ETH.
  • Optimism to Ethereum : 2.5K ETH.

• The volume of ETH in USD transfers from Ethereum to Optimism has been increasing over time and peaked in the first week of August.
• Total ETH volume in USD inflows outflows :
  • Ethereum to Optimism : $ 687M.
  • Optimism to Ethereum : $207.9 M.
• Median ETH bridged amount :
  • Ethereum to Optimism : $ 0.05.
  • Optimism to Ethereum : $ 1.04.
• Average ETH volume inflows and outflows :
  • Ethereum to Optimism : $ 3.4 K.
  • Optimism to Ethereum : $ 105.2 K.
• Maximum ETH bridged amount :
  • Ethereum to Optimism : $ 32.2 M.
  • Optimism to Ethereum :$ 8M.

• 82% of the number of bridges from Ethereum to Optimism was between 0 and 0.5 ETH.
• 5.5% of the number of bridges from Ethereum to Optimism is between 0.5 and 1 ETH.
• 88% of wallets have transferred between 0 and 0.5 ETH from Ethereum to Optimism.
• 18.2% of wallets have transferred between 0 and 0.5 ETH from Optimism to Ethereum.
• 13.6% of wallets have transferred between 20 and 50 ETH from Optimism to Ethereum!
• 53% of the number of bridges have transferred between 0 and 0.5 ETH from Optimism to Ethereum.

• The total volume of USDC transferred from Ethereum to Optimism has been increasing over time and peaked in the first week of August 2022, after which the bridge volume from Optimism to Ethereum increased.
• Total bridged ETH volume in USD :
  • Ethereum to Optimism : $687 M.
  • Optimism to Ethereum : $207.9 M.
• Average USDC volume inflows and outflows  :
  • Ethereum to Optimism : $401 K.
  • Optimism to Ethereum : $76 K.
• Median USDC bridged amount  :
  • Ethereum to Optimism : $18.1 K.
  • Optimism to Ethereum : $2.8 K.
• Maximum USDC bridged amount  :
  • Ethereum to Optimism : $50 M.
  • Optimism to Ethereum : $29.4 M.

• 22.6% of wallets have transferred between 1,000 and 5,000 USDC from Ethereum to Optimism. 20.6% of wallets have transferred between 100 and 500 USDC from Ethereum to Optimism. About 21.5% of the number of bridges from Ethereum to Optimism were between $1,000 and $5,000.

Concolusion :

From the above analysis, we obtained the following results:

1. The number of bridges from Ethereum to Optimism in all weeks has been more than the number of bridges from Optimism to Ethereum. The number of bridges from Ethereum to Optimism peaked in early September 2021.
2. The total number of bridges from Ethereum to Optimism: 214 thousand transactions.
3. The total number of bridges from Optimism to Ethereum: about 6500 transactions.
4. The number of wallets that have transferred their holdings from Ethereum to Optimism.
5. The volume of ETH transfers from Ethereum to Optimism has been increasing over time and peaked in the first week of August.
6. Total ETH volume inflows outflows :
   • Ethereum to Optimism : 312K ETH.
   • Optimism to Ethereum : 93.7K ETH.
7. Median ETH bridged amount :
   • Ethereum to Optimism : 152 ETH.
   • Optimism to Ethereum : 3K ETH.
8. Average ETH volume inflows and outflows :
   • Ethereum to Optimism : 47.6 ETH.
   • Optimism to Ethereum : 1.58 ETH.
9. Maximum ETH bridged amount :
   • Ethereum to Optimism : 19.9K ETH.
   • Optimism to Ethereum : 2.5K ETH.
10. The volume of ETH in USD transfers from Ethereum to Optimism has been increasing over time and peaked in the first week of August.
11. Total ETH volume in USD inflows outflows :
    • Ethereum to Optimism : $ 687M.
    • Optimism to Ethereum : $207.9 M.
12. Median ETH bridged amount :
    • Ethereum to Optimism : $ 0.05.
    • Optimism to Ethereum : $ 1.04.
13. Average ETH volume inflows and outflows :
    • Ethereum to Optimism : $ 3.4 K.
    • Optimism to Ethereum : $ 105.2 K.
14. Maximum ETH bridged amount :
    • Ethereum to Optimism : $ 32.2 M.
    • Optimism to Ethereum :$ 8M.
15. 82% of the number of bridges from Ethereum to Optimism was between 0 and 0.5 ETH.
16. 5.5% of the number of bridges from Ethereum to Optimism is between 0.5 and 1 ETH.
17. 88% of wallets have transferred between 0 and 0.5 ETH from Ethereum to Optimism.
18. 18.2% of wallets have transferred between 0 and 0.5 ETH from Optimism to Ethereum.
19. 13.6% of wallets have transferred between 20 and 50 ETH from Optimism to Ethereum!
20. 53% of the number of bridges have transferred between 0 and 0.5 ETH from Optimism to Ethereum.
21. The total volume of USDC transferred from Ethereum to Optimism has been increasing over time and peaked in the first week of August 2022, after which the bridge volume from Optimism to Ethereum increased.
22. Total bridged ETH volume in USD :
    • Ethereum to Optimism : $687 M.
    • Optimism to Ethereum : $207.9 M.
23. Average USDC volume inflows and outflows  :
    • Ethereum to Optimism : $401 K.
    • Optimism to Ethereum : $76 K.
24. Median USDC bridged amount  :
    • Ethereum to Optimism : $18.1 K.
    • Optimism to Ethereum : $2.8 K.
25. Maximum USDC bridged amount  :
    • Ethereum to Optimism : $50 M.
    • Optimism to Ethereum : $29.4 M.
26. 22.6% of wallets have transferred between 1,000 and 5,000 USDC from Ethereum to Optimism.
27. 20.6% of wallets have transferred between 100 and 500 USDC from Ethereum to Optimism.
28. About 21.5% of the number of bridges from Ethereum to Optimism were between $1,000 and $5,000.