Derive Pod/Zeroable for Pubkey (backport #20493) (#20496)

* Derive Pod/Zeroable for Pubkey

(cherry picked from commit f966859829)

# Conflicts:
#	Cargo.lock
#	programs/bpf/Cargo.lock
#	sdk/program/Cargo.toml

* rebase

Co-authored-by: Michael Vines <mvines@gmail.com>

Cargo.lock

@@ -468,6 +468,26 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b0017894339f586ccb943b01b9555de56770c11cda818e7e3d8bd93f4ed7f46e"
 
+[[package]]
+name = "bytemuck"
+version = "1.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72957246c41db82b8ef88a5486143830adeb8227ef9837740bdec67724cf2c5b"
+dependencies = [
+ "bytemuck_derive",
+]
+
+[[package]]
+name = "bytemuck_derive"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e215f8c2f9f79cb53c8335e687ffd07d5bfcb6fe5fc80723762d0be46e7cc54"
+dependencies = [
+ "proc-macro2 1.0.24",
+ "quote 1.0.9",
+ "syn 1.0.60",
+]
+
 [[package]]
 name = "byteorder"
 version = "1.3.4"
@@ -5101,6 +5121,7 @@ dependencies = [
  "borsh-derive",
  "bs58",
  "bv",
+ "bytemuck",
  "curve25519-dalek 2.1.0",
  "hex",
  "itertools 0.9.0",

programs/bpf/Cargo.lock

@@ -294,6 +294,26 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
 
+[[package]]
+name = "bytemuck"
+version = "1.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72957246c41db82b8ef88a5486143830adeb8227ef9837740bdec67724cf2c5b"
+dependencies = [
+ "bytemuck_derive",
+]
+
+[[package]]
+name = "bytemuck_derive"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e215f8c2f9f79cb53c8335e687ffd07d5bfcb6fe5fc80723762d0be46e7cc54"
+dependencies = [
+ "proc-macro2 1.0.24",
+ "quote 1.0.6",
+ "syn 1.0.67",
+]
+
 [[package]]
 name = "byteorder"
 version = "0.5.3"
@@ -3283,6 +3303,7 @@ dependencies = [
  "borsh-derive",
  "bs58",
  "bv",
+ "bytemuck",
  "curve25519-dalek 2.1.0",
  "hex",
  "itertools 0.9.0",

sdk/program/Cargo.toml

@@ -15,6 +15,7 @@ bincode = "1.3.1"
 borsh = "0.9.0"
 borsh-derive = "0.9.0"
 bs58 = "0.3.1"
+bytemuck = { version = "1.7.2", features = ["derive"] }
 bv = { version = "0.11.1", features = ["serde"] }
 hex = "0.4.2"
 itertools =  "0.9.0"

sdk/program/src/pubkey.rs

@@ -1,14 +1,16 @@
 #![allow(clippy::integer_arithmetic)]
-use crate::{decode_error::DecodeError, hash::hashv};
-
-use borsh::{BorshDeserialize, BorshSchema, BorshSerialize};
-use num_derive::{FromPrimitive, ToPrimitive};
-use std::{
-    convert::{Infallible, TryFrom},
-    fmt, mem,
-    str::FromStr,
+use {
+    crate::{decode_error::DecodeError, hash::hashv},
+    borsh::{BorshDeserialize, BorshSchema, BorshSerialize},
+    bytemuck::{Pod, Zeroable},
+    num_derive::{FromPrimitive, ToPrimitive},
+    std::{
+        convert::{Infallible, TryFrom},
+        fmt, mem,
+        str::FromStr,
+    },
+    thiserror::Error,
 };
-use thiserror::Error;
 
 /// Number of bytes in a pubkey
 pub const PUBKEY_BYTES: usize = 32;
@@ -48,20 +50,22 @@ impl From<u64> for PubkeyError {
 
 #[repr(transparent)]
 #[derive(
-    Serialize,
-    Deserialize,
-    BorshSerialize,
+    AbiExample,
     BorshDeserialize,
     BorshSchema,
+    BorshSerialize,
     Clone,
     Copy,
     Default,
+    Deserialize,
     Eq,
-    PartialEq,
-    Ord,
-    PartialOrd,
     Hash,
-    AbiExample,
+    Ord,
+    PartialEq,
+    PartialOrd,
+    Pod,
+    Serialize,
+    Zeroable,
 )]
 pub struct Pubkey([u8; 32]);