spl_token_2022::extension

Trait BaseStateWithExtensions

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pub trait BaseStateWithExtensions<S: BaseState> {
    // Required method
    fn get_tlv_data(&self) -> &[u8] ⓘ;

    // Provided methods
    fn get_extension_bytes<V: Extension>(&self) -> Result<&[u8], ProgramError> { ... }
    fn get_extension<V: Extension + Pod>(&self) -> Result<&V, ProgramError> { ... }
    fn get_variable_len_extension<V: Extension + VariableLenPack>(
        &self,
    ) -> Result<V, ProgramError> { ... }
    fn get_extension_types(&self) -> Result<Vec<ExtensionType>, ProgramError> { ... }
    fn get_first_extension_type(
        &self,
    ) -> Result<Option<ExtensionType>, ProgramError> { ... }
    fn try_get_account_len(&self) -> Result<usize, ProgramError> { ... }
    fn try_get_new_account_len<V: Extension + Pod>(
        &self,
    ) -> Result<usize, ProgramError> { ... }
    fn try_get_new_account_len_for_variable_len_extension<V: Extension + VariableLenPack>(
        &self,
        new_extension: &V,
    ) -> Result<usize, ProgramError> { ... }
}
Expand description

Trait for base state with extension

Required Methods§

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fn get_tlv_data(&self) -> &[u8] ⓘ

Get the buffer containing all extension data

Provided Methods§

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fn get_extension_bytes<V: Extension>(&self) -> Result<&[u8], ProgramError>

Fetch the bytes for a TLV entry

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fn get_extension<V: Extension + Pod>(&self) -> Result<&V, ProgramError>

Unpack a portion of the TLV data as the desired type

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fn get_variable_len_extension<V: Extension + VariableLenPack>( &self, ) -> Result<V, ProgramError>

Unpacks a portion of the TLV data as the desired variable-length type

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fn get_extension_types(&self) -> Result<Vec<ExtensionType>, ProgramError>

Iterates through the TLV entries, returning only the types

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fn get_first_extension_type( &self, ) -> Result<Option<ExtensionType>, ProgramError>

Get just the first extension type, useful to track mixed initializations

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fn try_get_account_len(&self) -> Result<usize, ProgramError>

Get the total number of bytes used by TLV entries and the base type

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fn try_get_new_account_len<V: Extension + Pod>( &self, ) -> Result<usize, ProgramError>

Calculate the new expected size if the state allocates the given fixed-length extension instance. If the state already has the extension, the resulting account length will be unchanged.

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fn try_get_new_account_len_for_variable_len_extension<V: Extension + VariableLenPack>( &self, new_extension: &V, ) -> Result<usize, ProgramError>

Calculate the new expected size if the state allocates the given variable-length extension instance.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§