From 09ff0162808ed5f443efa4fad127178ed3a6edd7 Mon Sep 17 00:00:00 2001
From: Hardhat Chad <hardhatchad@gmail.com>
Date: Fri, 6 Jun 2025 13:42:29 -0700
Subject: [PATCH] no-std keccak

---
 Cargo.lock              | 10 ++++++++++
 Cargo.toml              |  1 +
 ore/program/Cargo.toml  |  1 +
 ore/program/src/mine.rs | 11 +++++++----
 4 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index d4bd11f..197b2e6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1338,6 +1338,7 @@ dependencies = [
  "ore-api 3.7.0",
  "ore-boost-api",
  "rand 0.8.5",
+ "solana-nostd-keccak",
  "solana-program",
  "spl-associated-token-account",
  "spl-token 4.0.2",
@@ -1973,6 +1974,15 @@ version = "2.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49f626d3d461a623d7f8131fc4eedaed186e0f63c6f388b5ca782cdfcc8326e0"
 
+[[package]]
+name = "solana-nostd-keccak"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8ced70920435b1baa58f76e6f84bbc1110ddd1d6161ec76b6d731ae8431e9c4"
+dependencies = [
+ "sha3",
+]
+
 [[package]]
 name = "solana-packet"
 version = "2.1.15"
diff --git a/Cargo.toml b/Cargo.toml
index 1c3e69a..2155915 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,6 +25,7 @@ ore-api = { path = "./ore/api" }
 ore-delegate-api = { path = "./ore-delegate/api" }
 ore-boost-api = "4.0.0-alpha"
 solana-account-decoder = "^2.1"
+solana-nostd-keccak = "0.1.3"
 solana-program = "^2.1"
 solana-client = "^2.1"
 solana-sdk = "^2.1"
diff --git a/ore/program/Cargo.toml b/ore/program/Cargo.toml
index 25116ee..84be267 100644
--- a/ore/program/Cargo.toml
+++ b/ore/program/Cargo.toml
@@ -22,6 +22,7 @@ bincode.workspace = true
 mpl-token-metadata.workspace = true
 ore-api.workspace = true
 ore-boost-api.workspace = true
+solana-nostd-keccak.workspace = true
 solana-program.workspace = true
 spl-token.workspace = true
 spl-token-2022.workspace = true
diff --git a/ore/program/src/mine.rs b/ore/program/src/mine.rs
index c4fb04b..06e577e 100644
--- a/ore/program/src/mine.rs
+++ b/ore/program/src/mine.rs
@@ -1,5 +1,6 @@
 use ore_api::prelude::*;
-use solana_program::{keccak, slot_hashes::SlotHashes};
+use solana_nostd_keccak::hash;
+use solana_program::slot_hashes::SlotHashes;
 use steel::*;
 
 /// Mine a block.
@@ -75,13 +76,15 @@ pub fn process_mine(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
     // Reset miner hash if mining new block.
     if miner.block_id != block.id {
         miner.block_id = block.id;
-        miner.hash =
-            keccak::hashv(&[block.slot_hash.as_ref(), miner.authority.as_ref()]).to_bytes();
+        let mut args = [0u8; 64];
+        args[..32].copy_from_slice(&block.slot_hash);
+        args[32..].copy_from_slice(&miner.authority.to_bytes());
+        miner.hash = hash(&args);
     }
 
     // Mine.
     for _ in 0..amount {
-        miner.hash = keccak::hashv(&[miner.hash.as_ref()]).to_bytes();
+        miner.hash = hash(miner.hash.as_ref());
         if miner.hash < block.best_hash {
             block.best_hash = miner.hash;
             block.best_miner = miner.authority;