...tract deployer the default admin role: it will be able
// to grant and revoke any roles
// 授予合约部署者默认的管理角色：它将能够授予和撤销任何角色
_grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
}
function mint(address to, uint256 amount) pub...
...use graphics::math::{add, mul_scalar, Vec2d};
use piston_window::*;
use rand::prelude::*;
use std::alloc::{GlobalAlloc, Layout, System};
use std::time::Instant;
use std::cell::Cell;
#[global_allocator]
static ALLOCATOR: ReportingAllocator = ReportingAllocator;
struct ReportingAllocator...
...he Right RaaS Partner\\
\\
Explore the industry’s leading RaaS providers and factors to consider when choosing a RaaS.](https://www.alchemy.com/overviews/compare-raas-providers) [\\
\\
Layer 2\\
\\
What is ...
...我们探讨几个练习。
#### 练习 1
```javascript
contract Grandparent {
function myFunc() public virtual {}
}
contract Parent1 is Grandparent {
function p1() public {
myFunc();
}
}
contract Parent2 is Grandparent {
function p2() public {
my...
...rials.gitbook.io/zokyo-tutorials/tutorial-16-zero-knowledge-zk/definitions-and-essentials/incremental-merkle-tree?ref=ghost-2077.arvensis.systems)的 Merkle 树结构中存储与存款相关的信息。增量 Merkle 树表现得像一个常规的 Merkle 树（[Verkle Trees For The Rest Of Us](https:...
...wnloading...
Unpacking...
Setting up...
Unbox successful. Sweet!
Commands:
Compile: truffle compile
Migrate: truffle migrate
Test contracts: truffle test
Run dev server: npm run dev
duncanwang@ubuntu:~/work/name-age$
```
### 3.2 创建智能合约代码
...