migrate_from_0_1_0

This instruction can be used to migrate the singleton storage account in-place from the legacy layout to the current storage layout.

The instruction handler takes the storage account as a raw AccountInfo, manually verifies the discriminant and deserializes it according to the legacy layout.

It then ensures that the top_authority signer account matches the top_authority field of the deserialized storage account.

The storage account is reallocated, increasing its size to account for the additional space needed by the newer Storage account type.

Finally, the function reinitializes the account, by instantiating an instance of the new Storage account type and serializing it manually into the storage account.

This function does not prevent to migrate an already migrated storage account, allowing to corrupt its data. Refer to finding ref↗ for a more in depth discussion.

Arguments

• treasury: public key value used to initialize the treasury field of the migrated storage account

Accounts

• top_authority: Signer account giving authorizing the migration

  • Anchor flags: signer

  • Checks: must match the top_authority field of the storage account when decoded using the legacy layout

• storage: storage account to be migrated; taken as a raw AccountInfo

  • Anchor flags: mut

  • Seed: STORAGE_SEED (fixed constant)

Tests

Positive cases

Negative cases

• Note: this test was added as part of the remediations