Write and test a Template for Genesis Accounts (Simple Coin transfer)

[neysofu]

Genesis accounts should not be template-less, but rather they should have a template just like all other accounts (besides stubs as described in Self-Spawn). We must write a test a template that fits the bill that will spawn all accounts at genesis as created by go-svm.

[YaronWittenstein]

Once the Template will work I believe we can discard these pieces of code:

1. FFI svm_transfer API:
   

   svm/crates/runtime-ffi/src/api.rs

   Lines 579 to 600 in 6edb73d

   	/// Sends coins from the current executing account to a destination account.
   	///
   	/// # Panics
   	///
   	/// Panics when the destination account does not exist.
   	#[must_use]
   	#[no_mangle]
   	pub unsafe extern "C" fn svm_transfer(
   	runtime_ptr: *mut c_void,
   	src_addr: *const u8,
   	dst_addr: *const u8,
   	amount: u64,
   	) -> svm_result_t {
   	catch_unwind_or_fail(|| {
   	let runtime = get_runtime(runtime_ptr);
   	let src_account_addr = Address::new(std::slice::from_raw_parts(src_addr, Address::N));
   	let dst_account_addr = Address::new(std::slice::from_raw_parts(dst_addr, Address::N));
   	runtime.transfer(&src_account_addr, &dst_account_addr, amount);
   	svm_result_t::OK
   	})
   	}

2. Runtime transfer:
   

   svm/crates/runtime/src/runtime/runtime.rs

   Lines 720 to 747 in 6edb73d

   	/// Sends coins from the current executing account to a destination account.
   	///
   	/// # Panics
   	///
   	/// Panics when the destination account does not exist.
   	pub fn transfer(&self, src_addr: &Address, dst_addr: &Address, amount: u64) {
   	let mut src_account = AccountStorage::load(self.gs.clone(), src_addr).unwrap();
   	let mut dst_account = if let Some((_bal, _counter, _addr)) = self.get_account(dst_addr) {
   	AccountStorage::load(self.gs.clone(), dst_addr).unwrap()
   	} else {
   	panic!("Destination account does not exist")
   	};
   	let src_bal = src_account.balance().unwrap();
   	let dst_bal = dst_account.balance().unwrap();
   	if src_bal < amount {
   	panic!("Not enough balance to execute transfer");
   	}
   	src_account
   	.set_balance(src_bal.checked_sub(amount).unwrap())
   	.unwrap();
   	dst_account
   	.set_balance(dst_bal.checked_add(amount).unwrap())
   	.unwrap();
   	}
   	}

[neysofu]

Work for this issue is underway in the simple-coin-transfer-template/ crate.