feat(examples): add Base64 decoding async example

examples/Cargo.toml

@@ -3,6 +3,8 @@ members = [
   "aggregation/program",
   "alu-x0/program",
   "aggregation/script",
+  "base64/program",
+  "base64/script",
   "bls12381/program",
   "bls12381/script",
   "bn254/program",

examples/base64/program/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "base64-program"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+sp1-zkvm = { git = "https://github.com/succinctlabs/sp1.git" }
+base64 = "0.22"

examples/base64/program/src/main.rs

@@ -0,0 +1,13 @@
+#![no_main]
+sp1_zkvm::entrypoint!(main);
+
+use base64::{engine::general_purpose, Engine as _};
+
+pub fn main() {
+    let encoded_string: String = sp1_zkvm::io::read();
+
+    let decoded_bytes =
+        general_purpose::STANDARD.decode(&encoded_string).expect("Failed to decode base64");
+
+    sp1_zkvm::io::commit(&decoded_bytes);
+}

examples/base64/script/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "base64-script"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+sp1-sdk = { git = "https://github.com/succinctlabs/sp1.git" }
+tokio = { version = "1.37.0", features = ["full"] }

examples/base64/script/src/main.rs

@@ -0,0 +1,19 @@
+use sp1_sdk::{ProverClient, SP1Stdin, Prover};
+
+const ELF: &[u8] = include_bytes!("/home/amit_2004/sp1/examples/target/elf-compilation/riscv64im-succinct-zkvm-elf/release/base64-program");
+
+#[tokio::main]
+async fn main() {
+    let client = ProverClient::from_env().await;
+
+    let mut stdin = SP1Stdin::new();
+    stdin.write(&"SGVsbG8sIFNQMSE=".to_string());
+
+    println!("Executing program logic (Mock Mode)...");
+
+
+    let (mut public_values, _execution_report) = client.execute(sp1_sdk::Elf::Static(ELF), stdin).await.expect("Execution failed");    
+    let decoded = public_values.read::<Vec<u8>>();
+    println!("Decoded: {}", String::from_utf8(decoded).unwrap());
+    println!("Successfully verified execution logic!");
+}