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Miscellaneous video concepts

This page contains videos that explore miscellaneous concepts of smart contract development on NEAR.

StackOverflow question on NEAR Collections, and dealing with large numbers

Content overview

We address this question on StackOverflow:

https://stackoverflow.com/questions/64378144/why-cant-i-read-this-hashmap-in-a-near-contract/64438703#64438703

Specifically, we talk about why you'll likely want to use NEAR Collections instead of HashMap when using Rust.

See a list of the available collections here:

https://docs.rs/near-sdk/2.0.0/near_sdk/collections/index.html

We discuss U128 and the difference between the (lowercase) u128, and why JSON cannot handle very large numbers.

This video also walks through how to interact with a Rust smart contract using NEAR CLI. We demonstrate logging, view and call methods, unit tests, the benefit of creating subaccounts, and more.

Lastly, we walk through the process of writing, building, and deploying a Rust smart contract. Then we'll discover why NEAR subaccounts are useful when you may need to make breaking changes to state.

Got a question? Ask it on StackOverflow!