# \[PASSED\] OP-PIP-7: Improve Pyth Solana Receiver compute cost

**URL:** <https://forum.pyth.network/t/passed-op-pip-7-improve-pyth-solana-receiver-compute-cost/35>\
**Category:** Proposals\
**Tags:** operational-pip\
**Created:** [May 9, 2024, 3:39pm UTC](https://forum.pyth.network/t/passed-op-pip-7-improve-pyth-solana-receiver-compute-cost/35 "2024-05-09T15:39:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Pyth-DAO](https://avatars.discourse-cdn.com/v4/letter/p/edb3f5/32.png) [@Pyth-DAO](https://forum.pyth.network/u/Pyth-DAO)\
**Post date:** [May 9, 2024, 3:39pm UTC](https://forum.pyth.network/t/passed-op-pip-7-improve-pyth-solana-receiver-compute-cost/35/1 "2024-05-09T15:39:09Z")

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## Abstract

Upgrade the Pyth Solana Receiver on Solana to reduce compute cost on posting price updates.

## Rationale

Posting price update uses a lot of compute units because it uses an expensive hash function.

## Description

This upgrade will employ Solana SDK’s `hashv` function which uses much less compute units.

## Implementation Plan

- The Pyth Solana Receiver contract has been deployed and tested at the [`rec5EKMGg6MxZYaMdyBfgwp4d5rB9T1VQH5pJv5LtFJ`](https://solscan.io/account/rec5EKMGg6MxZYaMdyBfgwp4d5rB9T1VQH5pJv5LtFJ) address.

- Proposal id: [`BP1hfpWAVZx9Lwgn9B4fokYpbKikqhPWGGmav5SCS89A`](https://proposals.pyth.network/?tab=proposals&proposal=BP1hfpWAVZx9Lwgn9B4fokYpbKikqhPWGGmav5SCS89A)

- Relevant commits:

- [perf: use solana hash precompile (#1400) · pyth-network/pyth-crosschain@0e6484d · GitHub](https://github.com/pyth-network/pyth-crosschain/commit/0e6484daca38ed5eb5470a9816a81a2b48244ab8)

- Verify the implementation following the guide below:

1. Make sure you have the Solana CLI tools, Docker and sha256sum.  
solana: install `solana` from [here](https://docs.solanalabs.com/cli/install).  
Docker: install it from [here](https://www.docker.com/products/docker-desktop/)  
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` (or if you have already cloned it pull the latest changes with `git pull`).
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](https://proposals.pyth.network/?tab=proposals&proposal=BP1hfpWAVZx9Lwgn9B4fokYpbKikqhPWGGmav5SCS89A), 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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<div class="post-metadata">

**Author:** ![Pyth-DAO](https://avatars.discourse-cdn.com/v4/letter/p/edb3f5/32.png) [@Pyth-DAO](https://forum.pyth.network/u/Pyth-DAO)\
**Post date:** [May 9, 2024, 3:39pm UTC](https://forum.pyth.network/t/passed-op-pip-7-improve-pyth-solana-receiver-compute-cost/35/2 "2024-05-09T15:39:15Z")

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