slashing: add proof account functionality

Cargo.toml

@@ -49,6 +49,7 @@ members = [
   "shared-memory/program",
   "single-pool/cli",
   "single-pool/program",
+  "slashing/program",
   "stake-pool/cli",
   "stake-pool/program",
   "stateless-asks/program",

slashing/README.md

@@ -0,0 +1,5 @@
+# Slashing Program
+
+A program that validates a proof of a slashable event on chain for logging purposes.
+Users can create a proof buffer for the flavor of slashable infraction, populate it,
+and submit for verification.

slashing/program/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "spl-slashing"
+version = "0.1.0"
+description = "Solana Program Library Slashing"
+authors = ["Solana Labs Maintainers <[email protected]>"]
+repository = "https://github.com/solana-labs/solana-program-library"
+license = "Apache-2.0"
+edition = "2021"
+
+[features]
+no-entrypoint = []
+test-sbf = []
+
+[dependencies]
+bytemuck = { version = "1.19.0", features = ["derive"] }
+num-derive = "0.4"
+num-traits = "0.2"
+solana-program = "2.0.3"
+thiserror = "1.0"
+spl-pod = { version = "0.4.0", path = "../../libraries/pod" }
+
+[dev-dependencies]
+solana-program-test = "2.0.3"
+solana-sdk = "2.0.3"
+
+[lib]
+crate-type = ["cdylib", "lib"]
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]

slashing/program/Xargo.toml

@@ -0,0 +1,2 @@
+[target.bpfel-unknown-unknown.dependencies.std]
+features = []

slashing/program/program-id.md

@@ -0,0 +1 @@
+8sT74BE7sanh4iT84EyVUL8b77cVruLHXGjvTyJ4GwCe

slashing/program/src/entrypoint.rs

@@ -0,0 +1,14 @@
+//! Program entrypoint
+
+#![cfg(all(target_os = "solana", not(feature = "no-entrypoint")))]
+
+use solana_program::{account_info::AccountInfo, entrypoint::ProgramResult, pubkey::Pubkey};
+
+solana_program::entrypoint!(process_instruction);
+fn process_instruction(
+    program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    instruction_data: &[u8],
+) -> ProgramResult {
+    crate::processor::process_instruction(program_id, accounts, instruction_data)
+}

slashing/program/src/error.rs

@@ -0,0 +1,35 @@
+//! Error types
+
+use {
+    num_derive::FromPrimitive,
+    solana_program::{decode_error::DecodeError, program_error::ProgramError},
+    thiserror::Error,
+};
+
+/// Errors that may be returned by the program.
+#[derive(Clone, Debug, Eq, Error, FromPrimitive, PartialEq)]
+pub enum SlashingError {
+    /// Incorrect authority provided on write or close
+    #[error("Incorrect authority provided on write or close")]
+    IncorrectAuthority,
+
+    /// Invalid proof type
+    #[error("Invalid proof type")]
+    InvalidProofType,
+
+    /// Calculation overflow
+    #[error("Calculation overflow")]
+    Overflow,
+}
+
+impl From<SlashingError> for ProgramError {
+    fn from(e: SlashingError) -> Self {
+        ProgramError::Custom(e as u32)
+    }
+}
+
+impl<T> DecodeError<T> for SlashingError {
+    fn type_of() -> &'static str {
+        "Slashing Error"
+    }
+}