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Errors: Typo fix (#56)

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LM 2022-04-13 14:11:30 -04:00 committed by GitHub
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src/chapter_3/errors.md
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@ -74,4 +74,4 @@ pub enum MyError {
There are a couple of `require` macros to choose from ([search for require in the docs](https://docs.rs/anchor-lang/latest/anchor_lang/?search=require)). When comparing public keys, it's important to use the `keys` variants of the require statements like `require_keys_eq` instead of `require_eq` because comparing public keys with `require_eq` is very expensive.
> (Ultimately, all programs return the same Error: The [`ProgramError`](https://docs.rs/solana-program/latest/solana_program/program_error/enum.ProgramError.html). This Error has a field for a custom error number. This is where Anchor puts its internal and custom error codes. However, this is just a single number and a single number is only so useful. So in addition, in the case of AnchorErrors, Anchor logs the returned AnchorError and the Anchor clients parse these logs to provide as much information as possible. This is not always possible. For example, there is currently no easy way to get the logs of a `processed` transaction with preflight checks turned off. In addition, non-anchor or old anchor programs might not log AnchorErrors. In these cases, Anchor will fall back to checking whether the returned error number by the transaction matches a an error number defined in the `IDL` or an Anchor internal error code. If so, Anchor will at least enrich the error with the error message. Also, if there are logs available, Anchor will always try to parse the program error stack and return that so you know which program the error was returned from.
> (Ultimately, all programs return the same Error: The [`ProgramError`](https://docs.rs/solana-program/latest/solana_program/program_error/enum.ProgramError.html). This Error has a field for a custom error number. This is where Anchor puts its internal and custom error codes. However, this is just a single number and a single number is only so useful. So in addition, in the case of AnchorErrors, Anchor logs the returned AnchorError and the Anchor clients parse these logs to provide as much information as possible. This is not always possible. For example, there is currently no easy way to get the logs of a `processed` transaction with preflight checks turned off. In addition, non-anchor or old anchor programs might not log AnchorErrors. In these cases, Anchor will fall back to checking whether the returned error number by the transaction matches an error number defined in the `IDL` or an Anchor internal error code. If so, Anchor will at least enrich the error with the error message. Also, if there are logs available, Anchor will always try to parse the program error stack and return that so you know which program the error was returned from.