Add example kybra_like

Author: youknowone

examples/kybra_like.py

@@ -0,0 +1,90 @@
+from dataclasses import dataclass
+from typing import Dict, Any
+
+Query = Any
+Update = Any
+nat64 = Any
+
+__all__ = [
+    "initialize_supply",
+    "transfer",
+    "balance",
+    "ticker",
+    "name",
+    "total_supply",
+]
+
+
+@dataclass
+class Account:
+    address: str
+    balance: nat64
+
+
+@dataclass
+class State:
+    accounts: Dict[str, Account]
+    total_supply: nat64
+    ticker: str
+    name: str
+
+
+state = State(
+    accounts={},
+    total_supply=0,
+    ticker="",
+    name="KYBRA",
+)
+
+
+def initialize_supply(
+    ticker: str, name: str, total_supply: nat64, original_address: str
+) -> Update:
+    global state
+    state = State(
+        accounts={
+            original_address: Account(
+                address=original_address,
+                balance=total_supply,
+            )
+        },
+        ticker=ticker,
+        name=name,
+        total_supply=total_supply,
+    )
+
+    return True
+
+
+def transfer(from_: str, to: str, amount: nat64) -> Update:
+    global state
+    if state.accounts[to] is None:
+        state.accounts[to] = Account(address=to, balance=0)
+
+    state.accounts[from_].balance -= amount
+    state.accounts[to].balance += amount
+
+    return True
+
+
+def balance(address: str) -> Query:
+    account = state.accounts[address]
+    if account is None:
+        return 0
+    return account.balance
+
+
+def ticker() -> Query:
+    return state.ticker
+
+
+def name() -> Query:
+    return state.name
+
+
+def total_supply() -> Query:
+    return state.total_supply
+
+
+if __name__ == "__main__":
+    print(name())

examples/kybra_like.rs

@@ -0,0 +1,27 @@
+use rustpython_vm as vm;
+use vm::builtins::PyStrRef;
+
+fn main() -> vm::PyResult<()> {
+    let interp = vm::Interpreter::with_init(Default::default(), |vm| {
+        vm.add_native_modules(rustpython_stdlib::get_module_inits());
+    });
+    let result = interp
+        .run_or_else(
+            |vm, exc| {
+                vm.print_exception(exc.clone());
+                Err(exc)
+            },
+            |vm| {
+                vm.insert_sys_path(vm.new_pyobj("examples"))
+                    .expect("add path");
+                let module = vm.import("kybra_like", None, 0)?;
+                let name_func = module.get_attr("name", vm)?;
+                let result = vm.invoke(&name_func, ())?;
+                let result: PyStrRef = result.try_into_value(vm)?;
+                Ok(result)
+            },
+        )
+        .unwrap();
+    println!("name: {}", &result);
+    Ok(())
+}