Shawn Tabrizi

California, United States

https://shawntabrizi.com/

I am a core developer at Parity Technologies working on the Substrate blockchain framework.

Previously at Microsoft working on Azure Active Directory and Azure Service Health.

You can find my blog, portfolio, and contact information at: https://shawntabrizi.com/

top accounts reputation activity subscriptions

Why does the all 0 public key have a known private key in SR25519 and ED25519?

cryptography sr25519 ed25519 asked Mar 22, 2022 at 4:04

substrate.stackexchange.com

21 votes

When should I build a Substrate FRAME Pallet versus a Smart Contract?

pallet smart-contract ink frame asked Feb 8, 2022 at 18:21

substrate.stackexchange.com

16 votes

How do you convert between Substrate specific types and Rust primitive types?

rust blockchain substrate asked May 10, 2019 at 15:59

stackoverflow.com

12 votes

How to fix `parity_scale_codec::MaxEncodedLen` is not implemented for `T`?

frame maxencodedlen derive kitties-tutorial asked Mar 6, 2022 at 20:05

substrate.stackexchange.com

11 votes

What is the difference between Free Balance, Reserved Balance, Locked Balance, Vesting Balance, etc...?

balances free-balance reserved-balance locked-balance vesting-balance asked Feb 8, 2022 at 19:54

substrate.stackexchange.com

10 votes

What does the `--dev` flag do?

cli dev asked Mar 16, 2022 at 13:35

substrate.stackexchange.com

9 votes

How do you convert between Substrate specific types and Rust primitive types?

arithmetic saturating safe-math asked Feb 8, 2022 at 18:45

substrate.stackexchange.com

8 votes

Proper way to write kernel functions in CUDA?

c++ c cuda labview asked Jul 18, 2012 at 19:41

stackoverflow.com

8 votes

When did the Ethereum "free memory pointer" change? (6060... -> 6080...)

solc compilation bytecode assembly asked Nov 27, 2018 at 11:23

ethereum.stackexchange.com

7 votes

What is the difference between Free Balance, Reserved Balance, Locked Balance, Vesting Balance, etc...?

blockchain substrate asked Jun 2, 2019 at 19:07

stackoverflow.com

Top Answers

How to add application to Azure AD programmatically?

stackoverflow.com

When should I build a Substrate Runtime Module versus a Substrate Smart Contract?

stackoverflow.com

Getting ABI data for ERC20 tokens programatically with Web3

ethereum.stackexchange.com

Azure AAD - The audience is invalid

stackoverflow.com

Can anyone explain what's the difference between mist/geth/parity in simple terms?

ethereum.stackexchange.com

When should I build a Substrate FRAME Pallet versus a Smart Contract?

substrate.stackexchange.com

What's the difference between Substrate and Polkadot?

substrate.stackexchange.com

Azure AD returns Authentication_ExpiredToken on valid access token

stackoverflow.com

Which Graph API should be used with Azure AD B2C

stackoverflow.com

Is there a good indexer for substrate chains (like the graph)?

substrate.stackexchange.com

What is the difference between Free Balance, Reserved Balance, Locked Balance, Vesting Balance, etc...?

stackoverflow.com

What is the XCM format on Polkadot?

substrate.stackexchange.com

What does PoV stand for?

substrate.stackexchange.com

How do you convert between Substrate specific types and Rust primitive types?

stackoverflow.com

this.balance VS address(this).balance

ethereum.stackexchange.com

What is Cumulus?

substrate.stackexchange.com

Using PowerShell to generate report of all AD users with Manager

stackoverflow.com

AADSTS50012: Invalid client secret is provided when moving from a Test App to Production

stackoverflow.com

Unused variables warning in address.call return tuple (bool, bytes memory)

ethereum.stackexchange.com

What is the cost of event storage in substrate?

stackoverflow.com

Can you use floating point numbers or math in the Runtime?

substrate.stackexchange.com

`MaxEncodedLen` is not implemented for `Vec<u8>`

substrate.stackexchange.com

Web3 js 1.0 is throwing big number error while transfering tokens

ethereum.stackexchange.com

If view or pure function doesn't cost any gas, would they be abused/free ride?

ethereum.stackexchange.com

Transaction rollback in Substrate

substrate.stackexchange.com

TypeError: This type is only supported in the new experimental ABI encoder

ethereum.stackexchange.com

Someone sent 0 ETH to my contract and got 134100 tokens

ethereum.stackexchange.com

Transaction Failed: Error: 1014: Priority is too low: (515000139 vs 515000139)

stackoverflow.com

How to fix `parity_scale_codec::MaxEncodedLen` is not implemented for `T`?

substrate.stackexchange.com

Converting between AccountId32 and AccountId in Substrate

stackoverflow.com