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



0x544f3a206b6f75736869726f20464f523a20636f6e747269627574696f6e73206f66207375627374726174652337383832

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