Notes

tags: Ethereum, Sign Message source: “Signing Data | MetaMask Docs.” Accessed April 6, 2023. https://docs.metamask.io/guide/signing-data.html#signtypeddata-v4. Five Methods1 eth_sign allow to sign arbitrary hash.2 personal_sign add prefix to data and human readable text that encoded UFT-8.3 signTypedData or signTypedData_v1 first release that lacked some later security improvements. signTypedData_v3 signTypedData_v4 compatible with V3. Differences Between V3 and V44 Some input types that V3 doesn’t support but V4 does: Custom type array Custom type with null input Some input types that V4 doesn’t support but V3 does: ...

tags: Go, GDB Enable Core Dumps ulimit -S -c unlimited Confirm or Change The Location of Core Dumps sysctl -w kernel.core_pattern=/tmp/core.%e.%p # Or echo '/tmp/core.%e.%p' | tee /proc/sys/kernel/core_pattern Set GOTRACEBACK Environment Variable to Let Go Program Core Dumps when Panic export GOTRACEBACK=crash Run Go Program and Wait Segmentation Fault Use GDB to Debug gdb /path/to/goprogram /tmp/core-xx-xx Then use thread apply all bt to see all backtraces, include compiled C code. Note: -g option should be applied to the compiled C code to generate debug symbols. ...

tags: Ethereum Layer 2 Background You may meet the below error when you’re trying to transfer all your ETH from one address to another address: invalid transaction: insufficient funds for l1fee + gas * price + value The reason is that the Layer 1 fee are included in Scroll’s gas fee system, but the wallet only exclude the Layer 2 gas fee to do so when you transfer all your ETH. 1 ...

tags: Yubikey source: “How to Yubikey: A Configuration Cheatsheet,” March 1, 2023. https://debugging.works/blog/yubikey-cheatsheet/.

tags: Python, High Performance source: Textual Documentation. “Textual - Overhead of Python Asyncio Tasks,” March 8, 2023. https://textual.textualize.io/blog/2023/03/08/overhead-of-python-asyncio-tasks/. Tasks of asyncio from create to run, then shutdown is about: 260K tasks per second.