feat: Add account authority transfer wrapper

README.md

@@ -61,3 +61,52 @@ We welcome contributions to `mrgn-ts`! Please review our [contributing guideline
 ## License
 
 `mrgn-ts` is open source software licensed under the Apache 2.0 license.
+
+## Updating the IDL
+
+For historical reasons, the IDL file in this repository should be updated using
+the marginfi-v2 CLI tool to ensure the IDL stays in its canonical format.
+This is largely due to changes in the byte packing code used by Anchor,
+and the fact that Rust removed the `#repr(packed)` option in later releases.
+The process is to build the IDL file in the marginfi-v2 repository, patch it,
+then copy it into this repository and format it (via prettier).
+
+To update the IDL:
+
+1. Checkout the [marginfi-v2-cli](https://github.com/mrgnlabs/marginfi-v2/tree/main)
+   repository and build it. Ensure you are on an x86-64 machine to get the build
+   to succeed. Ensure the [solana](https://docs.solanalabs.com/cli/install) CLI tool is installed,
+   alongside anchor and rust and yarn.
+
+2. Run marginfi-v2/scripts/build-workspace to generate the original IDL (anchor build)
+
+3. Use the [marginfi-v2-cli](https://github.com/mrgnlabs/marginfi-v2/tree/main/clients/rust/marginfi-cli)
+   and run the `patch-idl` command against the generated marginfi.json IDL in the marginfi-v2 repository.
+
+Ensure you are on main branch in marginfi-v2.
+
+For example, run this command from the root of the marginfi-v2 repository,
+
+```
+cargo run \
+            --package marginfi-v2-cli \
+            --features dev \
+            -- patch-idl target
+```
+
+where `target` is the target directory for rust binaries. There should be an idl
+folder with the idl inside of `target`.
+
+This produces a modified marginfi.json file alongside the original file.
+The \_original file can be removed but is useful for checking diffs.
+
+4. Copy the marginfi.json file and the marginfi-types.ts into this repository.
+5. Lint the new IDL file using the prettier linter (.prettierrc) -- in VSCode you
+   can simply use Format Document and it applies the lint automatically.
+
+Review the IDL changes to make sure the new features/types in marginfiv2
+are reflected in the new IDL. For example new instructions or types, should be
+reflected in the new IDL.
+
+Commit the IDL changes and merge in the same mrgn-ts PR that adds features that rely on
+the new IDL. These should be committed together to ensure the new feature works.

packages/marginfi-client-v2/src/constants.ts

@@ -19,3 +19,4 @@ export const ADDRESS_LOOKUP_TABLE_FOR_GROUP: { [key: string]: [PublicKey] } = {
 
 export const DISABLED_FLAG: number = 1 << 0;
 export const FLASHLOAN_ENABLED_FLAG: number = 1 << 2;
+export const TRANSFER_ACCOUNT_AUTHORITY_FLAG: number = 1 << 3;