[PASSED] OP-PIP-5: Improve usability of Pyth Solana Receiver

Proposals
1

Abstract

Upgrade the Pyth Solana Receiver on Solana to support new features.

Rationale

We want the Pyth Solana Receiver to support these new features to improve its usability. Moreover, these features will enable the option to build a push oracle on top of the Pyth Solana Receiver.

Description

We are adding two features:

  • The option to provide a write authority, different than the payer when posting price updates. The payer is responsible for funding the rent of new price update accounts and to pay the fee for posting an update while the write authority has the ability to update the price update present in an existing price update account.
  • When a price update gets posted it will contain a posted_slot, this field can be used to check when the update got posted on Solana.

Implementation Plan

  1. Make sure you have the Solana CLI tools, Docker and sha256sum.
    solana: install solana from here.
    Docker: install it from here
    sha256sum: if on Mac you can install it as a part of coreutils with brew install coreutils
  2. Clone the pyth-crosschain repo (git clone https://github.com/pyth-network/pyth-crosschain.git).
  3. Go to pyth-crosschain/target_chains/solana/
  4. Run ./scripts/build_verifiable_program.sh. This will compile the code in a reproducible way and output a hash of the bytecode obtained from the code.
  5. In the proposal page, look at the following two important keys:
    The program field should match the program we’re trying to upgrade.
    The buffer field is the account that contains the proposed new implementation for the program. Copy the address.
  6. Get the hash of the proposed buffer solana -u m program dump <buffer> temp_file && sha256sum temp_file && rm temp_file
  7. Make sure the hash from step 4 and from step 6 match.
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