佛萨奇2.0-Metaforce模式源码开发

波场链/币安链/马蹄链2.0佛萨奇开发源码

2.0佛萨奇马蹄链/币安链/波场链dapp智能合约系统开发(详情及规则)5.1.0. 部署调用合约编译完成后，将得到一个.wasm格式的合约文件，可将之部署到指定到长安链上，完成合约部署。

部署合约的使用教程可详见：部署示例合约。5.1. 1迭代器使用示例点击此处查看接口说明使用示例如下：#[no_mangle]

pub extern "C" fn how_to_use_iterator() {

let ctx = &mut sim_context::get_sim_context();

// 构造数据

ctx.put_state("key1", "field1", "val".as_bytes());

ctx.put_state("key1", "field2", "val".as_bytes());

ctx.put_state("key1", "field23", "val".as_bytes());

ctx.put_state("key1", "field3", "val".as_bytes());

// 使用迭代器，能查出来 field1，field2，field23 三条数据

let r = ctx.new_iterator_with_field("key1", "field1", "field3");

if r.is_ok() {

let rs = r.unwrap();

// 遍历

while rs.has_next() {

// 获取下一行值

let row = rs.next_row().unwrap();

let key = row.get_string("key").unwrap();

let field = row.get_bytes("field");

let val = row.get_bytes("value");

// do something

}

// 关闭游标

rs.close();

}

ctx.put_state("key2", "field1", "val".as_bytes());

ctx.put_state("key3", "field2", "val".as_bytes());

ctx.put_state("key33", "field2", "val".as_bytes());

ctx.put_state("key4", "field3", "val".as_bytes());

// 能查出来 key2，key3，key33 三条数据

ctx.new_iterator("key2", "key4");

// 能查出来 key3，key33 两条数据

ctx.new_iterator_prefix_with_key("key3");

// 能查出来 field2，field23 三条数据

ctx.new_iterator_prefix_with_key_field("key1", "field2");

ctx.put_state_from_key("key5","val".as_bytes());

ctx.put_state_from_key("key56","val".as_bytes());

ctx.put_state_from_key("key6","val".as_bytes());

// 能查出来 key5，key56 两条数据

ctx.new_iterator("key5", "key6");

}复制5.1.2 Rust SDK API描述5.1.3. 下载 contract-sdk-rust 项目代码git clone https://git.chainmaker.org.cn/chainmaker/contract-sdk-rust -b v2.3.0复制5.1.4. 项目文件说明tree -I target

├── Cargo.lock # 依赖版本信息

├── Cargo.toml # 项目配置及依赖，参考：https://rustwasm.github.io/wasm-pack/book/cargo-toml-configuration.html

├── Makefile # build一个wasm文件

├── README.md # 编译环境说明

├── src

│ ├── easycodec.rs # 序列化工具类

│ ├── lib.rs # 程序入口

│ ├── sim_context.rs # 合约SDK主要接口及实现

│ ├── sim_context_bulletproofs.rs # 合约SDK基于bulletproofs的范围证明接口实现

│ ├── sim_context_paillier.rs # 合约SDK基于paillier的半同态运算接口实现

│ ├── sim_context_rs.rs # 合约SDK sql接口实现

│ └── vec_box.rs # 内存管理类复制5.1.5. 内置链交互接口用于链与SDK数据交互。// 申请size大小内存，返回该内存的首地址

pub extern "C" fn allocate(size: usize) -> i32 {}

// 释放某地址

pub extern "C" fn deallocate(pointer: *mut c_void) {}

// 获取SDK运行时环境

pub extern "C" fn runtime_type() -> i32 { 0 }复制5.1.6 用户与链交互接口/// SimContext is a interface with chainmaker interaction

pub trait SimContext {

// common method

fn call_contract(

&self,

contract_name: &str,

method: &str,

param: EasyCodec,

) -> Result;

fn ok(&self, value: &[u8]) -> result_code;

fn error(&self, body: &str) -> result_code;

fn log(&self, msg: &str);

fn arg(&self, key: &str) -> Result;

fn arg_as_utf8_str(&self, key: &str) -> String;

fn args(&self) -> &EasyCodec;

fn get_creator_org_id(&self) -> String;

fn get_creator_pub_key(&self) -> String;

fn get_creator_role(&self) -> String;

fn get_sender_org_id(&self) -> String;

fn get_sender_pub_key(&self) -> String;

fn get_sender_role(&self) -> String;

fn get_block_height(&self) -> u64;

fn get_tx_id(&self) -> String;

fn emit_event(&mut self, topic: &str, data: &Vec) -> result_code;

// paillier

fn get_paillier_sim_context(&self) -> Box;

// bulletproofs

fn get_bulletproofs_sim_context(&self) -> Box;

// sql

fn get_s(&self) -> Box;

// KV method

fn get_state(&self, key: &str, field: &str) -> Result;

fn get_state_from_key(&self, key: &str) -> Result;

fn put_state(&self, key: &str, field: &str, value: &[u8]) -> result_code;

fn put_state_from_key(&self, key: &str, value: &[u8]) -> result_code;

fn delete_state(&self, key: &str, field: &str) -> result_code;

fn delete_state_from_key(&self, key: &str) -> result_code;

/// new_iterator range of [startKey, limitKey), front closed back open

fn new_iterator(

&self,

start_key: &str,

limit_key: &str,

) -> Result;