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token-2022: Add MemoTransfer extension #2822
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CriesofCarrots
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Not fully functional, due to syscall, but everything else ready for a look! |
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joncinque
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Co-authored-by: Jon Cinque <[email protected]>
Co-authored-by: Jon Cinque <[email protected]>
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Woot! Excited to get this one in |
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Some users would like to require all transfers into particular accounts be accompanied by a memo.
This PR implements a MemoTransfer extension, which stores a byte indicating whether memo-transfers are or are not required. The extension can be initialized on any existing token Account, assuming the account has space for the extension. Callers should call Reallocate to make space, if the account is too small.
Currently, there is only a placeholder where the memo-requirement would be in
_process_transfer(), pending the syscall that will expose previous sibling instructions to be checked for the memo. Bumping the solana crates and using the syscall will be done in a subsequent PR.Needs:
Closes #2729