add basics/processing-instructions/steel (#166)

basics/processing-instructions/steel/.gitignore

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+target
+test-ledger

basics/processing-instructions/steel/Cargo.toml

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+[workspace]
+resolver = "2"
+members = ["api", "program"]
+
+[workspace.package]
+version = "0.1.0"
+edition = "2021"
+license = "Apache-2.0"
+homepage = ""
+documentation = ""
+respository = ""
+readme = "./README.md"
+keywords = ["solana"]
+
+[workspace.dependencies]
+processing-instructions-api = { path = "./api", version = "0.1.0" }
+bytemuck = "1.14"
+num_enum = "0.7"
+solana-program = "1.18"
+steel = "2.1"
+thiserror = "1.0"

basics/processing-instructions/steel/README.md

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+# ProcessingInstructions
+
+See the [Processing instructions's README](../README.md) for more information. In our case, we cannot use Borsh for serialization, as we're constrained by the `Steel` framework dependency on PODs (Plain Old Data).
+
+## Building
+
+```sh
+cargo build-sbf
+
+```
+## Tests
+
+This project includes both:
+- Rust tests: [`program/tests`](/program/tests) directory.
+- Node.js tests using [Bankrun](https://kevinheavey.github.io/solana-bankrun/): [`tests`](/tests) directory.
+
+```sh
+# rust tests
+cargo test-sbf 
+
+# node tests
+pnpm build-and-test # this will also build the program
+#or 
+pnpm test # if you have already built the program
+```

basics/processing-instructions/steel/api/Cargo.toml

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+[package]
+name = "processing-instructions-api"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+bytemuck.workspace = true
+num_enum.workspace = true
+solana-program.workspace = true
+steel.workspace = true
+thiserror.workspace = true

basics/processing-instructions/steel/api/src/instruction.rs

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+use steel::*;
+
+#[repr(u8)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, TryFromPrimitive)]
+pub enum ProcessingInstructionsInstruction {
+    GoToThePark = 0,
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable, PartialEq)]
+pub struct GoToTheParkData {
+    pub name: [u8; 64],
+    pub height: [u8; 8],
+}
+
+impl_to_bytes!(GoToTheParkData);
+
+fn string_to_bytes(s: &str) -> [u8; 64] {
+    let mut bytes = [0; 64];
+    let s_bytes = s.as_bytes();
+    let len = s_bytes.len().min(64);
+    bytes[..len].copy_from_slice(&s_bytes[..len]);
+    bytes
+}
+
+impl GoToTheParkData {
+    pub fn new(name: String, height: u64) -> Self {
+        Self {
+            name: string_to_bytes(&name),
+            height: height.to_le_bytes(),
+        }
+    }
+
+    pub fn try_from_bytes(data: &[u8]) -> Result<&Self, ProgramError> {
+        bytemuck::try_from_bytes(data).or(Err(ProgramError::InvalidInstructionData))
+    }
+
+    pub fn name(&self) -> String {
+        String::from_utf8_lossy(&self.name)
+            .trim_end_matches(char::from(0))
+            .to_string()
+    }
+
+    pub fn height(&self) -> u64 {
+        u64::from_le_bytes(self.height)
+    }
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable)]
+pub struct GoToThePark {
+    pub data: GoToTheParkData,
+}
+
+instruction!(ProcessingInstructionsInstruction, GoToThePark);

basics/processing-instructions/steel/api/src/lib.rs

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+pub mod instruction;
+pub mod sdk;
+
+pub mod prelude {
+    pub use crate::instruction::*;
+    pub use crate::sdk::*;
+}
+
+use steel::*;
+
+// TODO Set program id
+declare_id!("z7msBPQHDJjTvdQRoEcKyENgXDhSRYeHieN1ZMTqo35");

basics/processing-instructions/steel/api/src/sdk.rs

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+use steel::*;
+
+use crate::prelude::*;
+
+pub fn go_to_the_park(signer: Pubkey, data: GoToTheParkData) -> Instruction {
+    Instruction {
+        program_id: crate::ID,
+        accounts: vec![AccountMeta::new(signer, true)],
+        data: GoToThePark { data }.to_bytes(),
+    }
+}

basics/processing-instructions/steel/package.json

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+{
+  "name": "processing-instructions",
+  "version": "1.0.0",
+  "description": "",
+  "scripts": {
+    "test": "pnpm ts-mocha -p ./tsconfig.json -t 1000000 ./tests/*.test.ts",
+    "build-and-test": "cargo build-sbf --manifest-path=./program/Cargo.toml --sbf-out-dir=./tests/fixtures && pnpm test",
+    "build": "cargo build-sbf --manifest-path=./program/Cargo.toml --sbf-out-dir=./program/target/so",
+    "deploy": "solana program deploy ./program/target/so/processing_instructions_program.so"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@solana/web3.js": "^1.95.4"
+  },
+  "devDependencies": {
+    "@types/chai": "^4.3.7",
+    "@types/mocha": "10.0.9",
+    "@types/node": "^22.7.4",
+    "chai": "^4.3.7",
+    "mocha": "10.7.3",
+    "solana-bankrun": "0.4.0",
+    "ts-mocha": "^10.0.0",
+    "typescript": "5.6.3"
+  }
+}