I spent a few days to [fix a critical bug in Subxt](https://github.com/paritytech/substrate-subxt/pull/221), which have been blocking 3 teams for a few months. Before this fix, Subxt randomly crashes when submitting transactions, and it almost always crash when scanning a long range of blocks for their events.

The Pull Request is already merged.

Background: **[subxt](https://github.com/paritytech/substrate-subxt)** is the official rust client of Substrate. It's widely used by Polkadot ecosystem projects to interact with Polkadot and parachains. My team, Phala Network also relies on it to build all our bridges.

Time spent: 8 hours development, testing, and code-review



### Summary of Bug Fix in Subxt

- **Issue**: Subxt, a Rust client for Substrate, had a critical bug causing random crashes when submitting transactions and scanning long ranges of blocks.
- **Impact**: This bug had been blocking three teams for several months.
- **Fix**: A pull request (PR #221) was created and merged to fix the issue.
- **Background**: Subxt is widely used in the Polkadot ecosystem, including by Phala Network, which relies on it for building bridges.
- **Time Spent**: The fix took 8 hours, including development, testing, and code review.

Fixed an critical type decoding issue in subxt (rust substrate client)

root

whitelisted_caller

wish_for_change

staking_admin

treasurer

lease_admin

fellowship_admin

general_admin

auction_admin

referendum_canceller

referendum_killer

small_tipper

big_tipper

small_spender

medium_spender

big_spender