Initial integration of dynamic contracts and native module loading (#1256)

* Integration of native dynamic programs

programs/move_funds/Cargo.toml

@@ -0,0 +1,24 @@
+[package]
+name = "move_funds"
+version = "0.1.0"
+authors = [
+    "Anatoly Yakovenko <anatoly@solana.com>",
+    "Greg Fitzgerald <greg@solana.com>",
+    "Stephen Akridge <stephen@solana.com>",
+    "Michael Vines <mvines@solana.com>",
+    "Rob Walker <rob@solana.com>",
+    "Pankaj Garg <pankaj@solana.com>",
+    "Tyera Eulberg <tyera@solana.com>",
+    "Jack May <jack@solana.com>",
+]
+
+[dependencies]
+bincode = "1.0.0"
+generic-array = { version = "0.12.0", default-features = false, features = ["serde"] }
+libloading = "0.5.0"
+solana = { path = "../.." }
+
+[lib]
+name = "move_funds"
+crate-type = ["dylib"]
+

programs/move_funds/src/lib.rs

@@ -0,0 +1,48 @@
+extern crate bincode;
+extern crate solana;
+
+use bincode::deserialize;
+use solana::dynamic_program::KeyedAccount;
+
+#[no_mangle]
+pub extern "C" fn process(infos: &mut Vec<KeyedAccount>, data: &[u8]) {
+    let tokens: i64 = deserialize(data).unwrap();
+    if infos[0].account.tokens >= tokens {
+        infos[0].account.tokens -= tokens;
+        infos[1].account.tokens += tokens;
+    } else {
+        println!(
+            "Insufficient funds, asked {}, only had {}",
+            tokens, infos[0].account.tokens
+        );
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use bincode::serialize;
+    use solana::bank::Account;
+    use solana::signature::Pubkey;
+
+    #[test]
+    fn test_move_funds() {
+        let tokens: i64 = 100;
+        let data: Vec<u8> = serialize(&tokens).unwrap();
+        let keys = vec![Pubkey::default(); 2];
+        let mut accounts = vec![Account::default(), Account::default()];
+        accounts[0].tokens = 100;
+        accounts[1].tokens = 1;
+
+        {
+            let mut infos: Vec<KeyedAccount> = Vec::new();
+            for (key, account) in keys.iter().zip(&mut accounts).collect::<Vec<_>>() {
+                infos.push(KeyedAccount { key, account });
+            }
+
+            process(&mut infos, &data);
+        }
+        assert_eq!(0, accounts[0].tokens);
+        assert_eq!(101, accounts[1].tokens);
+    }
+}

programs/noop/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "noop"
+version = "0.1.0"
+authors = [
+    "Anatoly Yakovenko <anatoly@solana.com>",
+    "Greg Fitzgerald <greg@solana.com>",
+    "Stephen Akridge <stephen@solana.com>",
+    "Michael Vines <mvines@solana.com>",
+    "Rob Walker <rob@solana.com>",
+    "Pankaj Garg <pankaj@solana.com>",
+    "Tyera Eulberg <tyera@solana.com>",
+    "Jack May <jack@solana.com>",
+]
+
+[dependencies]
+libloading = "0.5.0"
+solana = { path = "../.." }
+
+[lib]
+name = "noop"
+crate-type = ["dylib"]
+

programs/noop/src/lib.rs

@@ -0,0 +1,6 @@
+extern crate solana;
+
+use solana::dynamic_program::KeyedAccount;
+
+#[no_mangle]
+pub extern "C" fn process(_infos: &mut Vec<KeyedAccount>, _data: &[u8]) {}

programs/print/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "print"
+version = "0.1.0"
+authors = [
+    "Anatoly Yakovenko <anatoly@solana.com>",
+    "Greg Fitzgerald <greg@solana.com>",
+    "Stephen Akridge <stephen@solana.com>",
+    "Michael Vines <mvines@solana.com>",
+    "Rob Walker <rob@solana.com>",
+    "Pankaj Garg <pankaj@solana.com>",
+    "Tyera Eulberg <tyera@solana.com>",
+    "Jack May <jack@solana.com>",
+]
+
+[dependencies]
+libloading = "0.5.0"
+solana = { path = "../.." }
+
+[lib]
+name = "print"
+crate-type = ["dylib"]
+

programs/print/src/lib.rs

@@ -0,0 +1,9 @@
+extern crate solana;
+
+use solana::dynamic_program::KeyedAccount;
+
+#[no_mangle]
+pub extern "C" fn process(infos: &mut Vec<KeyedAccount>, _data: &[u8]) {
+    println!("AccountInfos: {:#?}", infos);
+    //println!("data: {:#?}", data);
+}