Add utils to generate instruction_data based on name (anza-xyz#57)

Towards anza-xyz#55

external-crates/move/solana/util/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "input_json"
+version = "1.0.0"
+edition = "2021"
+
+[[bin]]
+name = "generate_input_json"
+path = "src/generate_input_json.rs"
+
+[dependencies]
+binascii = "0.1"
+clap = { version = "3.1.8", features = ["derive"] }

external-crates/move/solana/util/src/generate_input_json.rs

@@ -0,0 +1,50 @@
+#[cfg(test)]
+use binascii::{b32encode, b32decode};
+
+use clap::Parser;
+
+#[derive(Debug, Parser)]
+#[clap(author, version, about)]
+pub struct Args {
+    /// Entry function name
+    #[clap(short = 'f', long = "func-name")]
+    pub entry_function_name: String,
+    // Remaining arguments that we want to serialize as bytes
+    #[clap(short = 's', long = "args", default_value = "")]
+    pub argstring: String,
+}
+
+fn print_as_bytes(data : &str) -> Vec<u8> {
+    let length = data.len();
+    let input = &data[..length].as_bytes();
+    input.to_vec()
+}
+
+#[test]
+fn test_encode_decode() {
+    let data : &str = "counter__owner";
+    let input = &data[..data.len()].as_bytes();
+    let mut output = [0u8; 500];
+    let mut dec_out = [0u8; 200];
+    let encoded_output = b32encode(&input, &mut output).ok().unwrap();
+    let decoded_output = b32decode(&encoded_output, &mut dec_out).ok().unwrap();
+    assert_eq!(input, &decoded_output);
+}
+
+#[test]
+fn test_print_as_bytes() {
+    const ENCODED_DATA : [u8; 11] = [104, 101, 108, 108, 111, 95, 95, 109, 97, 105, 110];
+    let b = print_as_bytes("hello__main");
+    assert_eq!(b.len(), ENCODED_DATA.len());
+    assert_eq!(&ENCODED_DATA, &b[..ENCODED_DATA.len()]);
+}
+
+pub fn main() {
+    let args = Args::parse();
+    let mut b = print_as_bytes(args.entry_function_name.as_str());
+    let mut blen = b.len().to_le_bytes().to_vec();
+    println!("As bytes: {:?}", b.clone());
+    println!("len: {:?}", blen.clone());
+    blen.append(&mut b);
+    println!("\"instruction_data\": {:?}", blen);
+}