pezkuwichain
b6d35f6faf
Updated 4763 files with dual copyright: - Parity Technologies (UK) Ltd. - Dijital Kurdistan Tech Institute
68 lines
2.1 KiB
Rust
68 lines
2.1 KiB
Rust
// This file is part of Bizinikiwi.
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// Copyright (C) Parity Technologies (UK) Ltd. and Dijital Kurdistan Tech Institute
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#![no_std]
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#![no_main]
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include!("../panic_handler.rs");
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use uapi::{u256_bytes, u64_output, HostFn, HostFnImpl as api};
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#[no_mangle]
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#[polkavm_derive::polkavm_export]
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pub extern "C" fn deploy() {}
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#[no_mangle]
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#[polkavm_derive::polkavm_export]
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pub extern "C" fn call() {
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let balance = u64_output!(api::balance,);
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let mut output_buf = [0u8; 32];
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let output = &mut &mut output_buf[..];
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let _ = api::call(
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uapi::CallFlags::READ_ONLY,
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&uapi::SYSTEM_PRECOMPILE_ADDR,
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u64::MAX, // How much ref_time to devote for the execution. u64::MAX = use all.
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u64::MAX, // How much proof_size to devote for the execution. u64::MAX = use all.
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&[u8::MAX; 32], // No deposit limit.
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&[0u8; 32], // Value transferred to the contract.
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&uapi::solidity_selector("minimumBalance()"),
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Some(output),
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).unwrap();
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assert_ne!(output_buf, [0u8; 32]);
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let mut u64_buf = [0u8; 8];
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u64_buf[..8].copy_from_slice(&output_buf[24..32]);
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let minimum_balance = u64::from_be_bytes(u64_buf);
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// Make the transferred value exceed the balance by adding the minimum balance.
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let balance = balance + minimum_balance;
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// Try to self-destruct by sending more balance to the 0 address.
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// The call will fail because a contract transfer has a keep alive requirement.
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let res = api::call(
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uapi::CallFlags::empty(),
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&[0u8; 20],
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0,
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0,
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&[u8::MAX; 32],
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&u256_bytes(balance),
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&[],
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None,
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);
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assert!(matches!(res, Err(uapi::ReturnErrorCode::TransferFailed)));
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}
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