Documentation Index
Fetch the complete documentation index at: https://docs.optimism.io/llms.txt
Use this file to discover all available pages before exploring further.
This tutorial explains how to access transaction history between 23 June 2021 and the final regenesis.
Because of our final regenesis on 11 November 2021, older transactions are not part of the current blockchain and do not appear on Etherscan.
Dune access
You can use a query on Dune Analytics, similar to this query.
You have to log on with a Dune account, but their free tier is sufficient.
Browse to the [OVM1.0 User Address Transactions](https://dune.com/optimismfnd/OVM1.0-User-Address-Transactions) Dashboard on Dune.
Enter the address you wish to search in the `Address` text box in the top left.
Run the query (This requires log in. A free Dune account is sufficient).
optimism_legacy_ovm1 schema defined in Dune Docs here.
Lost data directories
Three data directories that were used by legacy L2Geth Sequencer instances
during the period of January 2021 to July 2021 had been errantly deleted during
an infra cleanup in August 2023.
These data directories contained information about the effects of transactions,
once executed. This information can only be obtained by properly executing the
transaction chain. The most valuable data within these directories was (1) events
emitted by smart contracts during each transaction and (2) the success state of
the transaction (whether or not the transaction executed or reverted). This
information is valuable for tracking things like ETH transfers or ERC-20 token
transfers. Without this we can still know the final set of balances but the
intermediate balances become opaque.
The transaction data for this period of time was published to a smart contract
on Ethereum called the CanonicalTransactionChain.
While it is theoretically possible to recover the data by downloading and
re-executing this chain of transactions from Ethereum, this is a labor intensive
and costly task that may not fully recover the data. The OP Labs team did
attempt data recovery efforts, including reaching out to several partners.
Impact
No state, balances, or user assets were lost. Most of the impact is felt by data
providers who want complete data sets for analysis purposes and by individuals
who may want this information for tax purposes.
Since this was very early during the history of OP Mainnet there are relatively
few transactions in this period and this data is infrequently requested. Most
requests for this data came from individuals who needed access to this information
for the 2021 tax season though this is mostly no longer relevant today (many
people who needed this data already retrieved it).
Going forward
We recognize the inconvenience this has caused some of our community and their
users and we’re sorry for the frustrations. In an effort to prevent similar
situations from happening again in the future, we are evaluating and updating
existing processes and frameworks.
