Inflows and Outflows (Redux)
Analyze Ethereum ⇽⇾ Optimism bridges
Observations
Volume is The main indicator to check the flow of tokens, we can see here that the inflow volume of all tokens except DAI is much higher than their outflow volume, so that the inflow volume of ETH is 576% higher than its outflow volume. But for DAI, the situation is different, so that the volume of outflow is twice the volume of inflow. Another interesting point is that the volume of the USDC bridges is higher than the rest, both in Inflow and Outflow, this is also true for the average volume per day and for the average volume per Bridger.
When we look at the daily volume statistics, the first thing that can be seen is that the inflow volume is higher on most days, so that the highest volume of these tokens in the inflow section is over 150M USD, while for the outflow, the highest daily volume is close to 50M USD. In both inflow and outflow, it is USDC that has the highest volume on most days. looking at the cumulative chart, it can be seen that in the inflow section, USDC and ETH have a high upward slope, unlike the other two tokens, and in the outflow section, it is only USDC that has been able to show a good upward slope.
Observations
Contrary to the volume, it is ETH that has the most bridgers, in the inflow section, the number of bridgers is nearly 12.5 times that of USDC, and in the outflow section, it is nearly 6 times higher than USDC.
In all days, ETH definitely has more bad bridges in a way that it cannot be compared with the others, another point is that the inflow statistics are almost better on most days.
Observations
Regarding the number of bridges event, as with the number of unique bridgers, we see ETH performing better in it and in the average number of bridges for each day, both inflow and outflow.
Regarding the average number of bridges for each user, USDC showed a better performance with 2.7 bridges in the INFLOW section and DAI had the highest number with 2.48 bridges in the OUTFLOW section.
In the daily statistics, we see the superiority of ETH in both directions, although this superiority is a little less in the outflow
Introduction
optimism network is a layer2 solution that is created to solve the scalability problems of the Ethereum network. The Optimism Network uses optimistic solutions (Optimistic Roll-up) to increase scalability. In this solution, optimism network by collecting and executing transactions on its network and sending them in a compact manner and in the form of a transaction to the Ethereum network, causes the scalability, speed of transactions and their Fee to be significantly reduced.
Users can use Native Optimism bridge toغ transfer their Token between Main net and Optimism
Method
- contract and summary on how I collected the data:
- I included all bridge transcations that belongs to hop, native optimism bridge and CbridgeV2
- optimism bridge contracts:
0x99c9fc46f92e8a1c0dec1b1747d010903e884be1 & 0x52ec2f3d7c5977a8e558c8d9c6000b615098e8fc
I used all the above contracts and with help of events_log, ez_token_transfers and ez_eth_transfers tables I created a query that tracks all the bridge transactions of the three-platform between Ethereum and Optimism networks. || query: Link
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our approach: for answering the bounty questions:
we will have 4 sections:
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Volume: we will have all the valuable data that are related to Volume such as Total Volume, average Volume per day, daily Volume and many others for each destination (inflow/outflow) divided by each symbol
other than daily Volume we have a scatter chart that we use for better comparison between daily inflow/outflow Volume for each token
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unique bridgers
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bridge Events
for both two above section we have all the valuable data that with them, we could answer the bounty questions better and correctly
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average bridge Amount: here we have Average bridge Amount for each destination dived by symbols and we have also daily Average Amount and daily 7-MA bridge Amount
All the sections mentioned above are absolutely necessary to answer and provide complete information on the topic of Bounty, so we have tried to consider all possible aspects of them.
all the above sections are necessary to
All graphs contain only the last 3-month
our insight will be base on daily Timeframe.

Observations
USDT has a higher average bridge Amount in the inflow section and for outflow USDC has a higher average.
The interesting thing is that ETH has the lowest average bridge Amount, even lower than DAI, and this can be a sign that most of those who bridge ETH are small wallets.
In the daily average, the superiority of all three stablecoins over ETH can be seen on most days.
In some days, we can see a very high average, for example, in the Inflow section and on October 3rd, we see bridge Amount equal to 1.43M USD for USDT.
Conclusion
- in overall the inflow volume of all tokens except DAI is much higher than their outflow volume
- volume of the USDC bridges is higher than the rest, both in Inflow and Outflow
- inflow volume is higher on most days
- ETH that has the most bridgers and bridge events for both inflow and outflow
- Regarding the average number of bridges for each user, USDC showed a better performance with 2.7 bridges in the INFLOW section and DAI had the highest number with 2.48 bridges in the OUTFLOW section.
- most of those who bridge ETH are small wallets
- USDT has a higher average bridge Amount in the inflow section and for outflow USDC has a higher average.