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changelog: add additional upgrade guide for 0.22.0 (#1497)

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Evan Conrad 2022-02-21 11:50:57 -08:00 committed by GitHub
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@ -37,6 +37,7 @@ This change will break most programs. Do the following to upgrade:
* change all `ProgramResult`'s to `Result<()>`
* change `#[error]` to `#[error_code]`
* change all `Err(MyError::SomeError.into())` to `Err(error!(MyError::SomeError))` and all `Err(ProgramError::SomeProgramError)` to `Err(ProgramError::SomeProgramError.into())` or `Err(Error::from(ProgramError::SomeProgramError).with_source(source!()))` to provide file and line source of the error (`with_source` is most useful with `ProgramError`s. `error!` already adds source information for custom and anchor internal errors).
* change all `solana_program::program::invoke()` to `solana_program::program::invoke().map_err(Into::into)` and `solana_program::program::invoke_signed()` to `solana_program::program::invoke().map_err(Into::into)`
## [0.21.0] - 2022-02-07