├── 6. 单元测试与集成测试 ├── .prettierrc.json ├── jest.config.json ├── .eslintrc.json ├── Cargo.toml ├── package.json ├── makefile ├── README.md ├── test │ ├── hello_test.spec.ts │ └── context.ts ├── src │ └── lib.rs └── tsconfig.json ├── 3. 合约的编译与部署 ├── near-cli-rs.png ├── macOS Keychain.png ├── Legacy Keychain.png └── README.md ├── 1. NEAR 区块链核心概念 ├── master key path.png └── README.md ├── 5. 跨合约调用与回调函数 ├── makefile ├── src │ ├── cross.rs │ └── lib.rs ├── Cargo.toml ├── README.md └── Cargo.lock ├── 2. 认识 NEAR 智能合约 ├── makefile ├── Cargo.toml ├── src │ └── lib.rs ├── README.md └── Cargo.lock ├── 4. 状态存储与容器 ├── makefile ├── Cargo.toml ├── src │ └── lib.rs ├── README.md └── Cargo.lock ├── 7. 编写一个 FT 合约 ├── makefile ├── Cargo.toml ├── README.md └── src │ └── lib.rs ├── 8. 编写一个 NFT 合约 ├── makefile ├── Cargo.toml ├── README.md └── src │ └── lib.rs ├── README.md └── .gitignore /6. 单元测试与集成测试/.prettierrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "singleQuote": true 3 | } 4 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/jest.config.json: -------------------------------------------------------------------------------- 1 | { 2 | "preset": "ts-jest", 3 | "detectOpenHandles": true, 4 | "testTimeout": 60000 5 | } 6 | -------------------------------------------------------------------------------- /3. 合约的编译与部署/near-cli-rs.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hanakannzashi/near-contract-course-basics/HEAD/3. 合约的编译与部署/near-cli-rs.png -------------------------------------------------------------------------------- /3. 合约的编译与部署/macOS Keychain.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hanakannzashi/near-contract-course-basics/HEAD/3. 合约的编译与部署/macOS Keychain.png -------------------------------------------------------------------------------- /3. 合约的编译与部署/Legacy Keychain.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hanakannzashi/near-contract-course-basics/HEAD/3. 合约的编译与部署/Legacy Keychain.png -------------------------------------------------------------------------------- /1. NEAR 区块链核心概念/master key path.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hanakannzashi/near-contract-course-basics/HEAD/1. NEAR 区块链核心概念/master key path.png -------------------------------------------------------------------------------- /6. 单元测试与集成测试/.eslintrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "root": true, 3 | "parser": "@typescript-eslint/parser", 4 | "plugins": [ 5 | "@typescript-eslint" 6 | ], 7 | "extends": [ 8 | "eslint:recommended", 9 | "plugin:@typescript-eslint/recommended" 10 | ], 11 | "rules": { 12 | "eol-last": "error" 13 | } 14 | } 15 | -------------------------------------------------------------------------------- /5. 跨合约调用与回调函数/makefile: -------------------------------------------------------------------------------- 1 | RUSTFLAGS = "-C link-arg=-s" 2 | PACKAGE_NAME = "hello_cross" 3 | 4 | lint: 5 | @cargo fmt --all 6 | @cargo clippy --fix --allow-dirty --allow-staged 7 | 8 | build: 9 | @rustup target add wasm32-unknown-unknown 10 | RUSTFLAGS=$(RUSTFLAGS) cargo build --target wasm32-unknown-unknown --release 11 | @mkdir -p res 12 | @cp target/wasm32-unknown-unknown/release/$(PACKAGE_NAME).wasm ./res/ 13 | 14 | all: lint build 15 | -------------------------------------------------------------------------------- /2. 认识 NEAR 智能合约/makefile: -------------------------------------------------------------------------------- 1 | RUSTFLAGS = "-C link-arg=-s" 2 | PACKAGE_NAME = "hello_near" 3 | 4 | lint: 5 | @cargo fmt --all 6 | @cargo clippy --fix --allow-dirty --allow-staged 7 | 8 | build: 9 | @rustup target add wasm32-unknown-unknown 10 | RUSTFLAGS=$(RUSTFLAGS) cargo build --target wasm32-unknown-unknown --release 11 | @mkdir -p res 12 | @cp target/wasm32-unknown-unknown/release/$(PACKAGE_NAME).wasm ./res/ 13 | 14 | all: lint build 15 | -------------------------------------------------------------------------------- /4. 状态存储与容器/makefile: -------------------------------------------------------------------------------- 1 | RUSTFLAGS = "-C link-arg=-s" 2 | PACKAGE_NAME = "hello_collections" 3 | 4 | lint: 5 | @cargo fmt --all 6 | @cargo clippy --fix --allow-dirty --allow-staged 7 | 8 | build: 9 | @rustup target add wasm32-unknown-unknown 10 | RUSTFLAGS=$(RUSTFLAGS) cargo build --target wasm32-unknown-unknown --release 11 | @mkdir -p res 12 | @cp target/wasm32-unknown-unknown/release/$(PACKAGE_NAME).wasm ./res/ 13 | 14 | all: lint build 15 | -------------------------------------------------------------------------------- /7. 编写一个 FT 合约/makefile: -------------------------------------------------------------------------------- 1 | RUSTFLAGS = "-C link-arg=-s" 2 | PACKAGE_NAME = "hello_ft" 3 | 4 | lint: 5 | @cargo fmt --all 6 | @cargo clippy --fix --allow-dirty --allow-staged 7 | 8 | build: 9 | @rustup target add wasm32-unknown-unknown 10 | RUSTFLAGS=$(RUSTFLAGS) cargo build --target wasm32-unknown-unknown --release 11 | @mkdir -p res 12 | @cp target/wasm32-unknown-unknown/release/$(PACKAGE_NAME).wasm ./res/ 13 | 14 | test: 15 | @cargo test 16 | 17 | all: lint build test 18 | -------------------------------------------------------------------------------- /8. 编写一个 NFT 合约/makefile: -------------------------------------------------------------------------------- 1 | RUSTFLAGS = "-C link-arg=-s" 2 | PACKAGE_NAME = "hello_nft" 3 | 4 | lint: 5 | @cargo fmt --all 6 | @cargo clippy --fix --allow-dirty --allow-staged 7 | 8 | build: 9 | @rustup target add wasm32-unknown-unknown 10 | RUSTFLAGS=$(RUSTFLAGS) cargo build --target wasm32-unknown-unknown --release 11 | @mkdir -p res 12 | @cp target/wasm32-unknown-unknown/release/$(PACKAGE_NAME).wasm ./res/ 13 | 14 | test: 15 | @cargo test 16 | 17 | all: lint build test 18 | -------------------------------------------------------------------------------- /5. 跨合约调用与回调函数/src/cross.rs: -------------------------------------------------------------------------------- 1 | use near_sdk::{ext_contract, AccountId, PromiseOrValue, PublicKey}; 2 | 3 | // 声明 Linkdrop 合约的接口 4 | #[ext_contract(linkdrop_contract)] 5 | pub trait LinkdropContract { 6 | fn create_account( 7 | &mut self, 8 | new_account_id: AccountId, 9 | new_public_key: PublicKey, 10 | ) -> PromiseOrValue; 11 | } 12 | 13 | // 宏展开后会生成一个 `pub mod linkdrop_contract`, 包含对 `Promise` 的封装 14 | // 该代码自动生成, 无需编写 15 | // pub mod linkdrop_contract { 16 | // 17 | // } 18 | -------------------------------------------------------------------------------- /2. 认识 NEAR 智能合约/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "hello_near" 3 | version = "1.0.0" 4 | edition = "2021" 5 | 6 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html 7 | 8 | [lib] 9 | crate-type = ["cdylib"] 10 | 11 | [dependencies] 12 | near-sdk = "4.1.1" 13 | 14 | [patch.crates-io] 15 | parity-secp256k1 = { git = 'https://github.com/paritytech/rust-secp256k1.git' } 16 | 17 | [profile.release] 18 | codegen-units = 1 19 | opt-level = "z" 20 | lto = true 21 | debug = false 22 | panic = "abort" 23 | overflow-checks = true 24 | -------------------------------------------------------------------------------- /5. 跨合约调用与回调函数/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "hello_cross" 3 | version = "1.0.0" 4 | edition = "2021" 5 | 6 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html 7 | 8 | [lib] 9 | crate-type = ["cdylib"] 10 | 11 | [dependencies] 12 | near-sdk = "4.1.1" 13 | 14 | [patch.crates-io] 15 | parity-secp256k1 = { git = 'https://github.com/paritytech/rust-secp256k1.git' } 16 | 17 | [profile.release] 18 | codegen-units = 1 19 | opt-level = "z" 20 | lto = true 21 | debug = false 22 | panic = "abort" 23 | overflow-checks = true 24 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "hello_test" 3 | version = "1.0.0" 4 | edition = "2021" 5 | 6 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html 7 | 8 | [lib] 9 | crate-type = ["cdylib"] 10 | 11 | [dependencies] 12 | near-sdk = "4.1.1" 13 | 14 | [patch.crates-io] 15 | parity-secp256k1 = { git = 'https://github.com/paritytech/rust-secp256k1.git' } 16 | 17 | [profile.release] 18 | codegen-units = 1 19 | opt-level = "z" 20 | lto = true 21 | debug = false 22 | panic = "abort" 23 | overflow-checks = true 24 | -------------------------------------------------------------------------------- /4. 状态存储与容器/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "hello_collections" 3 | version = "1.0.0" 4 | edition = "2021" 5 | 6 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html 7 | 8 | [lib] 9 | crate-type = ["cdylib"] 10 | 11 | [dependencies] 12 | near-sdk = "4.1.1" 13 | 14 | [patch.crates-io] 15 | parity-secp256k1 = { git = 'https://github.com/paritytech/rust-secp256k1.git' } 16 | 17 | [profile.release] 18 | codegen-units = 1 19 | opt-level = "z" 20 | lto = true 21 | debug = false 22 | panic = "abort" 23 | overflow-checks = true 24 | -------------------------------------------------------------------------------- /7. 编写一个 FT 合约/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "hello_ft" 3 | version = "1.0.0" 4 | edition = "2021" 5 | 6 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html 7 | 8 | [lib] 9 | crate-type = ["cdylib"] 10 | 11 | [dependencies] 12 | near-sdk = "4.1.1" 13 | near-contract-standards = "4.1.1" 14 | 15 | [patch.crates-io] 16 | parity-secp256k1 = { git = 'https://github.com/paritytech/rust-secp256k1.git' } 17 | 18 | [profile.release] 19 | codegen-units = 1 20 | opt-level = "z" 21 | lto = true 22 | debug = false 23 | panic = "abort" 24 | overflow-checks = true 25 | -------------------------------------------------------------------------------- /8. 编写一个 NFT 合约/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "hello_nft" 3 | version = "1.0.0" 4 | edition = "2021" 5 | 6 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html 7 | 8 | [lib] 9 | crate-type = ["cdylib"] 10 | 11 | [dependencies] 12 | near-sdk = "4.1.1" 13 | near-contract-standards = "4.1.1" 14 | 15 | [patch.crates-io] 16 | parity-secp256k1 = { git = 'https://github.com/paritytech/rust-secp256k1.git' } 17 | 18 | [profile.release] 19 | codegen-units = 1 20 | opt-level = "z" 21 | lto = true 22 | debug = false 23 | panic = "abort" 24 | overflow-checks = true 25 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/package.json: -------------------------------------------------------------------------------- 1 | { 2 | "private": true, 3 | "type": "commonjs", 4 | "scripts": { 5 | "test": "jest", 6 | "lint": "eslint 'test/**/*.ts' --fix", 7 | "prettier": "prettier 'test/**/*.ts' --write --list-different" 8 | }, 9 | "devDependencies": { 10 | "@types/jest": "^29.5.12", 11 | "@types/node": "^20.12.0", 12 | "@typescript-eslint/eslint-plugin": "^7.3.1", 13 | "@typescript-eslint/parser": "^7.3.1", 14 | "eslint": "^8.57.0", 15 | "jest": "^29.7.0", 16 | "near-workspaces": "^3.5.0", 17 | "prettier": "^3.0.1", 18 | "ts-jest": "^29.1.2", 19 | "typescript": "5.4.3" 20 | }, 21 | "engines": { 22 | "node": ">=20" 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/makefile: -------------------------------------------------------------------------------- 1 | RUSTFLAGS = "-C link-arg=-s" 2 | PACKAGE_NAME = "hello_test" 3 | 4 | lint-contract: 5 | @cargo fmt --all 6 | @cargo clippy --fix --allow-dirty --allow-staged 7 | 8 | lint-integration: 9 | @pnpm install 10 | @pnpm lint 11 | @pnpm prettier 12 | 13 | lint: lint-contract lint-integration 14 | 15 | build: 16 | @rustup target add wasm32-unknown-unknown 17 | RUSTFLAGS=$(RUSTFLAGS) cargo build --target wasm32-unknown-unknown --release 18 | @mkdir -p res 19 | @cp target/wasm32-unknown-unknown/release/$(PACKAGE_NAME).wasm ./res/ 20 | 21 | test-unit: 22 | @cargo test 23 | 24 | test-integration: 25 | @pnpm test 26 | 27 | test: test-unit test-integration 28 | 29 | all: lint build test 30 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # NEAR 智能合约开发教程 (基础篇) 2 | 3 | 本篇是 [NEAR](https://docs.near.org/concepts/basics/protocol) 智能合约 (以下简称合约) 开发教程 (基础篇), 适合刚接触合约发开的新人开发者 4 | 5 | 通过本篇的学习, 你将了解合约开发的基本知识, 学会编写和测试合约代码, 学会部署合约并与之进行交互. 在本篇的最后还会带你了解 NEAR 协议标准 6 | [NEPs](https://github.com/near/neps) 并带你实现其中的两个标准合约 7 | 8 | 学习本篇之前, 希望你拥有以下前置知识 9 | * [Rust](https://www.rust-lang.org/zh-CN) 编程语言基础 10 | 11 | ## 章节列表 12 | 1. [NEAR 区块链核心概念](1.%20NEAR%20区块链核心概念/README.md) 13 | 2. [认识 NEAR 智能合约](2.%20认识%20NEAR%20智能合约/README.md) 14 | 3. [合约的编译与部署](3.%20合约的编译与部署/README.md) 15 | 4. [状态存储与容器](4.%20状态存储与容器/README.md) 16 | 5. [跨合约调用与回调函数](5.%20跨合约调用与回调函数/README.md) 17 | 6. [单元测试与集成测试](6.%20单元测试与集成测试/README.md) 18 | 7. [编写一个 FT 合约](7.%20编写一个%20FT%20合约/README.md) 19 | 8. [编写一个 NFT 合约](8.%20编写一个%20NFT%20合约/README.md) 20 | -------------------------------------------------------------------------------- /5. 跨合约调用与回调函数/README.md: -------------------------------------------------------------------------------- 1 | # 跨合约调用与回调函数 2 | NEAR 是一条异步链, 一笔交易会被拆分为一个或多个 Receipt 在不同的区块执行. 3 | Receipt 在 NEAR SDK 中被抽象为 `Promsie`, 发起跨合约调用就是创建一个包含 `FunctionCall` 的 `Promise`, 调用逻辑在当前方法执行的区块不会执行, 而是在之后的区块中异步执行 4 | 5 | 由于 Receipt 跨了区块, 当交易失败时无法完全回滚, 只会回滚发生错误的那个 Receipt, 因此我们往往需要对调用结果进行回调, 以保证合约状态一致性 6 | 7 | NEAR SDK 针对跨合约调用提供了高级 API, 该 API 本质上是对 Promise 的封装 8 | 9 | ## 跨合约调用示例 (使用高级 API) 10 | 该合约可以通过调用 [Linkdrop](https://github.com/near/near-linkdrop) 合约提供的 `create_account` 方法创建一个该合约账户的子账户, 用户需要支付一定的 NEAR 作为初始余额, 如果创建失败, 则退回这笔费用 11 | 12 | 1. 在 [cross.rs](./src/cross.rs) 中声明 Linkdrop 合约方法的接口 13 | 2. 在 [lib.rs](./src/lib.rs) 中实现回调函数 `resolve_create_account`, 主要实现账户创建失败后的退款逻辑 14 | 3. 在 [lib.rs](./src/lib.rs) 中编写完整的跨合约调用逻辑 `create_account_by_linkdrop` 15 | 16 | ## 手动分配 gas 17 | 跨合约调用时默认将剩余 gas 平均分配给所有调用, 高级 API 中可以通过 `with_static_gas` 和 `with_unused_gas_weight` 手动分配 gas 18 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/README.md: -------------------------------------------------------------------------------- 1 | # 单元测试与集成测试 2 | 3 | ## 单元测试 4 | 单元测试用于检测单元模块的代码逻辑, 从内部测试合约代码, 无法检测一些外部 API 和宏 5 | 6 | 如 [lib.rs](./src/lib.rs) 所示, 用 `#[cfg(test)]` 标注测试模块, 用 `#[test]` 标注测试任务, 测试主要使用 `near_sdk::test_utils` 模块 7 | 8 | ### 运行单元测试 9 | 运行单元测试 10 | ```shell 11 | cargo test 12 | ``` 13 | 14 | ## 集成测试 15 | 集成测试需要使用 workspaces, 会在本地起一个 sandbox, 模拟链上环境, 可以进行外部测试. 有 [workspaces-rs](https://github.com/near/workspaces-rs) 和 [workspaces-js](https://github.com/near/workspaces-js) 两种版本. 16 | 其中 JS 版本更加契合外部调用合约的习惯, 因此本教程选择 JS 版本 17 | 18 | ### 安装 workspaces 19 | ```shell 20 | pnpm add near-workspaces -D 21 | ``` 22 | 23 | ### 安装 jest 24 | workspaces 并不具备测试能力, 因此需要配合测试框架使用, 本教程使用 [jest](https://github.com/jestjs/jest) 作为测试框架 25 | ```shell 26 | pnpm add ts-jest jest @types/jest -D 27 | ``` 28 | 29 | 在 [jest.config.json](./jest.config.json) 中配置 jest 30 | ```json 31 | { 32 | "preset": "ts-jest", 33 | "detectOpenHandles": true, 34 | "testTimeout": 60000 35 | } 36 | ``` 37 | 38 | ### 运行集成测试 39 | jest 会自动寻找后缀为 `.sepc.ts` 或 `.test.ts` 的文件并执行测试代码 40 | ```shell 41 | pnpm test 42 | ``` 43 | 44 | ## 运行示例测试代码 45 | ```shell 46 | make all 47 | ``` 48 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/test/hello_test.spec.ts: -------------------------------------------------------------------------------- 1 | import { initContext, Context } from './context'; 2 | 3 | let context: Context; 4 | 5 | beforeAll(async () => { 6 | // 初始化全局上下文 7 | context = await initContext(); 8 | }); 9 | 10 | afterAll(async () => { 11 | const { worker } = context; 12 | // 记得关 sandbox, 不然多跑几次内存就满了 13 | await worker.tearDown(); 14 | }); 15 | 16 | test('Test setter without permission', async () => { 17 | const { contract, root } = context; 18 | 19 | const promise = root.call(contract, 'set_account_description', { 20 | account_id: 'bob.near', 21 | description: 'Nice Bob', 22 | }); 23 | 24 | await expect(promise).rejects.toThrow( 25 | 'Only contract owner can call this method.', 26 | ); 27 | }); 28 | 29 | test('Test setter getter', async () => { 30 | const { contract, alice } = context; 31 | 32 | await alice.call(contract, 'set_account_description', { 33 | account_id: 'bob.near', 34 | description: 'Nice Bob', 35 | }); 36 | 37 | const description = await contract.view('get_account_description', { 38 | account_id: 'bob.near', 39 | }); 40 | 41 | expect(description).toEqual('Nice Bob'); 42 | }); 43 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/test/context.ts: -------------------------------------------------------------------------------- 1 | import fs from 'fs'; 2 | import { NearAccount, Worker } from 'near-workspaces'; 3 | 4 | export interface Context { 5 | worker: Worker; 6 | root: NearAccount; 7 | contract: NearAccount; 8 | alice: NearAccount; 9 | } 10 | 11 | export async function initContext(): Promise { 12 | const worker = await Worker.init({ 13 | network: 'sandbox', 14 | rm: true, // 关闭 sandbox 后删除测试缓存文件, 节约硬盘空间 15 | }); 16 | 17 | // 默认根账户名为 `test.near` 18 | const root = worker.rootAccount; 19 | 20 | // `hello_test.test.near` 21 | const contract = await root.createSubAccount('hello_test'); 22 | 23 | // `alice.test.near` 24 | const alice = await root.createSubAccount('alice'); 25 | 26 | const code = fs.readFileSync('res/hello_test.wasm'); 27 | 28 | // 部署并初始化合约 29 | const result = await contract 30 | .batch(contract.accountId) 31 | // Deploy Action 32 | .deployContract(code) 33 | // FunctionCall Action 34 | .functionCall('init', { 35 | owner_id: alice.accountId, 36 | }) 37 | // 执行交易 38 | .transact(); 39 | 40 | if (result.succeeded) { 41 | console.log('Succeed to init contract'); 42 | } else { 43 | throw Error(`Failed to init contract: ${result.Failure?.error_message}`); 44 | } 45 | 46 | return { worker, root, contract, alice }; 47 | } 48 | -------------------------------------------------------------------------------- /2. 认识 NEAR 智能合约/src/lib.rs: -------------------------------------------------------------------------------- 1 | use near_sdk::borsh::{self, BorshDeserialize, BorshSerialize}; 2 | use near_sdk::{env, near_bindgen, require, AccountId, PanicOnDefault}; 3 | use std::collections::HashMap; 4 | 5 | #[near_bindgen] // 定义合约根结构, 一个项目中只能有一个根结构 6 | #[derive(BorshDeserialize, BorshSerialize, PanicOnDefault)] // 实现 Borsh 序列化 7 | pub struct Contract { 8 | // 合约所有者 9 | owner_id: AccountId, 10 | // 账户及其描述信息. 注: `std::collections` 作为容器不是最好的选择, 此处仅用于教学目的 11 | descriptions: HashMap, 12 | } 13 | 14 | #[near_bindgen] // 定义合约方法 15 | impl Contract { 16 | #[init] // 标记合约初始化方法 17 | pub fn init(owner_id: AccountId) -> Self { 18 | Self { 19 | owner_id, 20 | descriptions: HashMap::new(), 21 | } 22 | } 23 | 24 | // Change 方法, 第一个参数为 `&mut self` 25 | pub fn set_account_description(&mut self, account_id: AccountId, description: String) { 26 | require!( 27 | env::predecessor_account_id() == self.owner_id, 28 | "Only contract owner can call this method." 29 | ); 30 | self.descriptions.insert(account_id, description); 31 | } 32 | 33 | // View 方法, 第一个参数为 `&self` 34 | pub fn get_account_description(&self, account_id: AccountId) -> Option<&String> { 35 | self.descriptions.get(&account_id) 36 | } 37 | } 38 | -------------------------------------------------------------------------------- /4. 状态存储与容器/src/lib.rs: -------------------------------------------------------------------------------- 1 | use near_sdk::borsh::{self, BorshDeserialize, BorshSerialize}; 2 | use near_sdk::store::LookupMap; 3 | use near_sdk::{ 4 | env, near_bindgen, require, AccountId, BorshStorageKey, CryptoHash, PanicOnDefault, 5 | }; 6 | 7 | #[near_bindgen] 8 | #[derive(BorshDeserialize, BorshSerialize, PanicOnDefault)] 9 | pub struct Contract { 10 | owner_id: AccountId, 11 | // 来自 `near_sdk::store` 12 | // 该容器内的数据与容器本身分开存储, 容器本身是根结构的一部分, 但内部数据是独立的存储记录 13 | descriptions: LookupMap, 14 | } 15 | 16 | // 容器在初始化的时候都需要唯一的 Storage Key 17 | // 可以使用 `BorshStorageKey` 宏来获取 Storage Key 18 | #[derive(BorshSerialize, BorshStorageKey)] 19 | enum StorageKey { 20 | Descriptions, 21 | 22 | #[allow(unused)] 23 | UnusedKey, 24 | 25 | // 动态的 Storage Key, 通常用于容器嵌套的情况 26 | #[allow(unused)] 27 | UnusedDynamicKey { 28 | hash: CryptoHash, 29 | }, 30 | } 31 | 32 | #[near_bindgen] 33 | impl Contract { 34 | #[init] 35 | pub fn init(owner_id: AccountId) -> Self { 36 | Self { 37 | owner_id, 38 | descriptions: LookupMap::new(StorageKey::Descriptions), 39 | } 40 | } 41 | 42 | pub fn set_account_description(&mut self, account_id: AccountId, description: String) { 43 | require!( 44 | env::predecessor_account_id() == self.owner_id, 45 | "Only contract owner can call this method." 46 | ); 47 | self.descriptions.insert(account_id, description); 48 | } 49 | 50 | pub fn get_account_description(&self, account_id: AccountId) -> Option<&String> { 51 | self.descriptions.get(&account_id) 52 | } 53 | } 54 | -------------------------------------------------------------------------------- /2. 认识 NEAR 智能合约/README.md: -------------------------------------------------------------------------------- 1 | # 认识 NEAR 智能合约 2 | NEAR 是一条高性能分片 Layer1 公链. NEAR 账户是 NEAR 区块链的访问入口, 而智能合约就是部署在 NEAR 账户上的一段代码. 3 | 智能合约提供接口, 让外部能够访问和修改账户状态 (也叫合约状态). 目前, 一个账户只能部署一份合约代码, 重复部署会覆盖原有代码 4 | 5 | 通常的合约交互的流程: 发起合约调用 -> 执行合约代码 -> 读写合约状态 -> 返回调用结果. 6 | 流程中有 3 处主要的数据交互 7 | 1. 发起合约调用时的参数传递 8 | 2. 读写合约状态 9 | 3. 返回调用结果时的返回值传递 10 | 11 | 1 和 3 属于合约外部数据传递, 默认情况下使用 [JSON](https://github.com/serde-rs/json) 序列化. 12 | 2 属于合约内部数据传递, 默认情况下使用 [Borsh](https://github.com/near/borsh-rs) 序列化 13 | 14 | ## 合约项目结构 15 | NEAR 合约项目与普通的 Rust 项目结构一致 16 | ``` 17 | . 18 | ├── Cargo.lock 19 | ├── Cargo.toml 20 | └── src 21 | └── lib.rs 22 | ``` 23 | 24 | [NEAR SDK](https://github.com/near/near-sdk-rs) 是 NEAR 合约发开的最常用工具, 我们需要导入该库 (本教程使用 `4.1.1` 版本) 25 | ```shell 26 | cargo add near-sdk@4.1.1 27 | ``` 28 | 29 | 我们需要在 `Cargo.toml` 中设置 `crate-type` 用于编译 WASM 二进制文件 30 | ```toml 31 | [lib] 32 | crate-type = ["cdylib"] 33 | ``` 34 | 35 | 注: 若出现找不到 `parity-secp256k1` 的错误, 请在 `Cargo.toml` 中添加 36 | ```toml 37 | [patch.crates-io] 38 | parity-secp256k1 = { git = 'https://github.com/paritytech/rust-secp256k1.git' } 39 | ``` 40 | 41 | ## 合约代码解析 42 | [lib.rs](./src/lib.rs) 是合约代码的入口, 本教程编写了一个非常简单的智能合约, 该合约有一个所有者权限 `owner_id`, 合约存储账户 `AccountId` 以及账户对应的描述信息 `String`. 43 | 只有合约所有者可以修改描述信息，任何人都可以读取描述信息 44 | 45 | ### 合约根结构 46 | `Contract` 结构体是合约的根结构, 使用 `#[near_bindgen]` 标记, 根结构需要被存储在合约状态里, 因此还需要实现 Borsh 序列化 47 | 48 | ### 合约方法 49 | 合约方法被定义在使用 `#[near_bindgen]` 标记的 `impl` 块中, 并且只有 `pub` 的方法才能被合约外部访问 50 | 51 | 合约方法可以是 52 | * 第一个参数为 `&self` 的 View 方法 53 | * 第一个参数为 `&mut self` 的 Change 方法 54 | * 第一个参数与 `self` 无关的合约初始化方法 55 | 56 | ### 合约初始化 57 | 合约默认使用 `Default` trait 来初始化, 因此我们必须为根结构实现这个 trait, 但是 `default` 方法没有参数, 用于初始化不太灵活, 绝大多数情况下我们都会自定义初始化方法. 58 | `init` 方法就是一个带参数的初始化方法, 使用 `#[init]` 标记, 同时我们还需要为根结构实现一个不可用的 `default` 方法 `#derive[PanicOnDefault]` 以通过编译. 59 | 60 | ### View 方法和 Change 方法 61 | `get_account_description` 方法第一个参数是 `&self` 无法修改合约状态, 因此是一个 View 方法; 62 | 而 `set_account_description` 第一个参数是 `&mut self` 允许修改合约状态，因此是一个 Change 方法. 63 | View 方法可以不消耗 gas 直接调用, 而 Change 方法必须发起一笔交易消耗 gas 去调用 64 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Logs 2 | logs 3 | *.log 4 | npm-debug.log* 5 | yarn-debug.log* 6 | yarn-error.log* 7 | lerna-debug.log* 8 | 9 | # Diagnostic reports (https://nodejs.org/api/report.html) 10 | report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json 11 | 12 | # Runtime data 13 | pids 14 | *.pid 15 | *.seed 16 | *.pid.lock 17 | 18 | # Directory for instrumented libs generated by jscoverage/JSCover 19 | lib-cov 20 | 21 | # Coverage directory used by tools like istanbul 22 | coverage 23 | *.lcov 24 | 25 | # nyc test coverage 26 | .nyc_output 27 | 28 | # Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files) 29 | .grunt 30 | 31 | # Bower dependency directory (https://bower.io/) 32 | bower_components 33 | 34 | # node-waf configuration 35 | .lock-wscript 36 | 37 | # Compiled binary addons (https://nodejs.org/api/addons.html) 38 | build/Release 39 | 40 | # Dependency directories 41 | node_modules/ 42 | jspm_packages/ 43 | 44 | # TypeScript v1 declaration files 45 | typings/ 46 | 47 | # TypeScript cache 48 | *.tsbuildinfo 49 | 50 | # Optional npm cache directory 51 | .npm 52 | 53 | # Optional eslint cache 54 | .eslintcache 55 | 56 | # Microbundle cache 57 | .rpt2_cache/ 58 | .rts2_cache_cjs/ 59 | .rts2_cache_es/ 60 | .rts2_cache_umd/ 61 | 62 | # Optional REPL history 63 | .node_repl_history 64 | 65 | # Output of 'npm pack' 66 | *.tgz 67 | 68 | # Yarn Integrity file 69 | .yarn-integrity 70 | 71 | # dotenv environment variables file 72 | .env 73 | .env.test 74 | 75 | # parcel-bundler cache (https://parceljs.org/) 76 | .cache 77 | 78 | # Next.js build output 79 | .next 80 | 81 | # Nuxt.js build / generate output 82 | .nuxt 83 | dist 84 | 85 | # Gatsby files 86 | .cache/ 87 | # Comment in the public line in if your project uses Gatsby and *not* Next.js 88 | # https://nextjs.org/blog/next-9-1#public-directory-support 89 | # public 90 | 91 | # vuepress build output 92 | .vuepress/dist 93 | 94 | # Serverless directories 95 | .serverless/ 96 | 97 | # FuseBox cache 98 | .fusebox/ 99 | 100 | # DynamoDB Local files 101 | .dynamodb/ 102 | 103 | # TernJS port file 104 | .tern-port 105 | 106 | # Local dataset 107 | dataset/local 108 | 109 | # Local files 110 | .DS_Store 111 | 112 | # JetBrains IDE 113 | .idea 114 | 115 | # Contract WASM 116 | res 117 | 118 | # Build target 119 | target 120 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/src/lib.rs: -------------------------------------------------------------------------------- 1 | use near_sdk::borsh::{self, BorshDeserialize, BorshSerialize}; 2 | use near_sdk::store::LookupMap; 3 | use near_sdk::{env, near_bindgen, require, AccountId, BorshStorageKey, PanicOnDefault}; 4 | 5 | #[near_bindgen] 6 | #[derive(BorshDeserialize, BorshSerialize, PanicOnDefault)] 7 | pub struct Contract { 8 | owner_id: AccountId, 9 | descriptions: LookupMap, 10 | } 11 | 12 | #[derive(BorshSerialize, BorshStorageKey)] 13 | enum StorageKey { 14 | Descriptions, 15 | } 16 | 17 | #[near_bindgen] 18 | impl Contract { 19 | #[init] 20 | pub fn init(owner_id: AccountId) -> Self { 21 | Self { 22 | owner_id, 23 | descriptions: LookupMap::new(StorageKey::Descriptions), 24 | } 25 | } 26 | } 27 | 28 | #[near_bindgen] 29 | impl Contract { 30 | pub fn set_account_description(&mut self, account_id: AccountId, description: String) { 31 | require!( 32 | env::predecessor_account_id() == self.owner_id, 33 | "Only contract owner can call this method." 34 | ); 35 | self.descriptions.insert(account_id, description); 36 | } 37 | 38 | pub fn get_account_description(&self, account_id: AccountId) -> Option<&String> { 39 | self.descriptions.get(&account_id) 40 | } 41 | } 42 | 43 | #[cfg(test)] 44 | mod test { 45 | use crate::Contract; 46 | use near_sdk::test_utils::VMContextBuilder; 47 | use near_sdk::{testing_env, AccountId}; 48 | 49 | fn alice() -> AccountId { 50 | "alice.near".parse().unwrap() 51 | } 52 | 53 | fn bob() -> AccountId { 54 | "bob.near".parse().unwrap() 55 | } 56 | 57 | #[test] 58 | #[should_panic(expected = "Only contract owner can call this method.")] 59 | fn test_setter_without_permission() { 60 | let mut contract = Contract::init(alice()); 61 | contract.set_account_description(bob(), "Nice Bob".to_string()); 62 | } 63 | 64 | #[test] 65 | fn test_setter_getter() { 66 | let mut contract = Contract::init(alice()); 67 | 68 | let context = VMContextBuilder::new() 69 | .predecessor_account_id(alice()) 70 | .build(); 71 | testing_env!(context); 72 | 73 | contract.set_account_description(bob(), "Nice Bob".to_string()); 74 | let description = contract.get_account_description(bob()).unwrap(); 75 | assert_eq!(description, "Nice Bob"); 76 | } 77 | } 78 | -------------------------------------------------------------------------------- /4. 状态存储与容器/README.md: -------------------------------------------------------------------------------- 1 | # 状态存储与容器 2 | 3 | ## 状态存储 4 | NEAR 链上数据以 Key - Value 的形式存储 5 | 6 | 合约根结构 (由 `#[near_bindgen]` 标记的结构体) 会被序列化成一条记录, 并且这条记录的 Key 固定为 `b"STATE"`, 对应的 base64 值为 `U1RBVEU=`. 7 | 当合约被调用时, 根结构会被反序列化到内存 8 | 9 | ### 合约状态 10 | ```json 11 | [ 12 | { 13 | "key": "U1RBVEU=", 14 | "value": "EgAAAGNvcm5mbG93ZXIudGVzdG5ldAAAAAA=" 15 | } 16 | ] 17 | ``` 18 | 初始化后的合约状态只有一条记录, 其中 `value` 的值就是我们定义的 `Contract` 结构体 19 | 20 | ### 插入数据后的合约状态 21 | 当我们仿照第一章中的示例合约, 使用 `std::collections::HashMap` 作为容器时, 这个容器包括它内部的数据都会作为合约根结构的一部分存在. 22 | 当插入数据时, 数据会被保存为根结构的一部分, 使根结构变大 23 | ```json 24 | [ 25 | { 26 | "key": "U1RBVEU=", 27 | "value": "EgAAAGNvcm5mbG93ZXIudGVzdG5ldAEAAAAFAAAAYWxpY2UEAAAAZ29vZA==" 28 | } 29 | ] 30 | ``` 31 | 32 | 可以看到 `value` 对应的字符串变长了但是记录的数量没改变 33 | 34 | ## 容器 35 | 如果根结构一直增大, 当合约被调用时反序列化需要消耗更多的 gas, 一旦超出 gas 上限可能会导致合约无法正常运行 36 | 37 | 为了解决这个问题, near-sdk 提供了两个容器模块, 分别是 `near_sdk::store` 和 `near_sdk::collections` (以下简称 Store 和 Collections). 38 | 这些容器本身与它们内部的数据是分离的, 当我们向容器中插入一条数据时, 在链上会产生一条 (或多条) 新的记录, 而不是将数据保存为合约根结构的一部分 39 | 40 | ⚠️ Store 和 Collections 的容器均未实现 JSON 序列化, 因此默认情况下无法把它们作为合约方法的返回值. 如果希望返回容器内的部分或全部数据, 请使用迭代器功能转换为标准库容器 41 | 42 | ### 使用 Collections 时合约状态示例 43 | 插入数据前 44 | ```json 45 | [ 46 | { 47 | "key": "U1RBVEU=", 48 | "value": "EgAAAGNvcm5mbG93ZXIudGVzdG5ldAEAAAAA" 49 | } 50 | ] 51 | ``` 52 | 53 | 插入数据后 54 | ```json 55 | [ 56 | { 57 | "key": "U1RBVEU=", 58 | "value": "EgAAAGNvcm5mbG93ZXIudGVzdG5ldAEAAAAA" 59 | }, 60 | { 61 | "key": "AAUAAABhbGljZQ==", 62 | "value": "BAAAAGdvb2Q=" 63 | } 64 | ] 65 | ``` 66 | 67 | 可以看到合约根结构的 `value` 值并没有变化, 但是产生了一条新的记录, 这些记录只有在需要的时候才会参与反序列化 68 | 69 | ### 常用容器 70 | * `LookupMap `: 不可迭代的映射类型 71 | * `LookupSet`: 不可迭代的集合类型 72 | * `Vector`: 可迭代的列表类型 73 | * `UnorderedMap`: 可迭代的映射类型, 相比 `LookupMap` 存储占用更大 74 | * `UnorderedSet`: 可迭代的集合类型, 相比 `LookupSet` 存储占用更大 75 | * `LazyOption`: 按需加载的数据类型, 适合存储大型数据 76 | 77 | 由于每个容器在插入数据时都会在全局状态中产生一条新的记录, 需要有唯一的前缀与容器绑定, 用于区分不同容器的数据. 78 | 因此这些容器在初始化时都需要传入唯一的 Storage Key 作为记录前缀 79 | 80 | 可以使用 rust 的 `enum` 类型配合 `BorshStorageKey` 宏得到 Storage Key 81 | 82 | ### Store 与 Collections 的区别 83 | | | Store | Collections | 84 | |---------------|--------------------------------------|-------------------| 85 | | 缓存 | 有 | 无 | 86 | | 插入的数据类型 | 所有权类型 `K` 和 `V` | 引用类型 `&K` 和 `&V` | 87 | | 获取的数据类型 | 引用类型 `Option<&V>` 或 `Option<&mut V>` | 所有权类型 `Option` | 88 | | 修改数据后是否需要重新插入 | 不需要 | 需要 | 89 | 90 | Store 与 Collections 在使用方式上区别较大, 通常不建议在同一个项目中同时使用这两个模块 91 | -------------------------------------------------------------------------------- /3. 合约的编译与部署/README.md: -------------------------------------------------------------------------------- 1 | # 合约的编译与部署 2 | 3 | ## 安装 NEAR CLI 4 | NEAR CLI 是一个与 NEAR 区块链交互的终端工具, 有 [near-cli-rs](https://github.com/near/near-cli-rs) 和 [near-cli-js](https://github.com/near/near-cli) 两种版本 5 | 6 | 其中 Rust 版是交互式终端, 并且功能更加强大, 因此本教程选择 Rust 版本 7 | ```shell 8 | cargo install near-cli-rs 9 | ``` 10 | 11 | 与 CLI 交互 12 | ```shell 13 | near 14 | ``` 15 | 16 | ![near-cli-rs](./near-cli-rs.png) 17 | 18 | ### 切换 RPC 19 | NEAR [官方 RPC](https://rpc.testnet.near.org) 需要科学上网, 因此我们可能需要使用个人 RPC, 可以通过 [All That Node](https://www.allthatnode.com) 免费注册个人 RPC 20 | 21 | 以 macOS 为例, 获取测试网 RPC 后编辑 `~/Library/Application\ Support/near-cli/config.toml` 文件, 修改 `[network_connection.testnet]` 下的 `rpc_url` 字段即可切换 RPC 22 | 23 | ## 创建并导入 NEAR 账户 24 | 1. 打开测试网网页钱包 [MyNearWallet](https://testnet.mynearwallet.com), 根据指引注册 NEAR 账户, 保存好助记词 25 | 2. 将助记词导入终端 26 | ```shell 27 | near account import-account using-seed-phrase "${YOUR_SEED_PHRASE}" --seed-phrase-hd-path 'm/44'\''/397'\''/0'\''' network-config testnet 28 | ``` 29 | 30 | ### Keychain 31 | 导入私钥时, 可以选择保存在 macOS Keychain 或 Legacy Keychain 中 32 | 33 | 如果保存在 macOS Keychain 中, 可以在 macOS 自带的**钥匙串访问**应用中找到私钥文件. 34 | 当导入同一个账户的多个不同私钥时, 虽然钥匙串名称是相同的, 但由于钥匙串账户不同, 私钥文件不会发生覆盖. 当需要签署交易的时候, 会自动去找钥匙串中可用的私钥进行签名. 35 | **私钥文件不会被 iCloud 同步** 36 | 37 | ![macOS Keychain](./macOS%20Keychain.png) 38 | 39 | 如果保存在 Legacy Keychain 中, 可以在 `~/.near-credentials/${NETWORK_ID}` 目录中找到私钥文件. 包括一个与账户同名的 JSON 文件和一个与账户同名的目录, 40 | 目录里有一个与公钥同名的 JSON 文件, 该文件的内容和外面那个 JSON 是一样的, 都是私钥文件, 只是文件名不一样. 41 | 当导入同一个账户的多个不同私钥时, 最外面的 JSON 文件不会被覆盖, 而是将新的私钥文件保存在对应目录中. 当需要签署交易的时候, 会自动去找对应目录中可用的私钥进行签名 42 | 43 | ![Legacy Keychain](./Legacy%20Keychain.png) 44 | 45 | ## 编译第一章中的示例合约 46 | 1. 安装 WASM 编译目标 47 | ```shell 48 | rustup target add wasm32-unknown-unknown 49 | ``` 50 | 2. 编译合约 51 | ```shell 52 | RUSTFLAGS="-C link-arg=-s" cargo build --target wasm32-unknown-unknown --release 53 | ``` 54 | 3. 将合约 WASM 文件移动到项目根目录下方便后续操作 55 | ```shell 56 | mkdir -p ./res && cp ./target/wasm32-unknown-unknown/release/hello_near.wasm ./res/ 57 | ``` 58 | 59 | 以上操作已经封装在 makefile 文件中 60 | ```shell 61 | make all 62 | ``` 63 | 64 | ## 部署和交互 65 | 假设你注册了两个测试网账户 `alice.testnet` 和 `code.testnet`, 一个用于作为主账户, 另一个用于作为合约账户, 私钥保存在 legacy keychain 中 66 | 67 | 1. 部署并初始化合约 68 | ```shell 69 | near contract deploy code.testnet use-file ./res/hello_near.wasm with-init-call init json-args '{"owner_id":"alice.testnet"}' prepaid-gas '100.000 TeraGas' attached-deposit '0 NEAR' network-config testnet sign-with-keychain send 70 | ``` 71 | 2. 调用 Change 方法 72 | ```shell 73 | near contract call-function as-transaction code.testnet set_account_description json-args '{"account_id":"bob.testnet","description":"Nice Bob"}' prepaid-gas '100.000 TeraGas' attached-deposit '0 NEAR' sign-as alice.testnet network-config testnet sign-with-keychain send 74 | ``` 75 | 3. 调用 View 方法 76 | ```shell 77 | near contract call-function as-read-only code.testnet get_account_description json-args '{"account_id":"bob.testnet"}' network-config testnet now 78 | ``` 79 | -------------------------------------------------------------------------------- /7. 编写一个 FT 合约/README.md: -------------------------------------------------------------------------------- 1 | # 编写一个 FT 合约 2 | FT 即 Fungible Token 同质化通证 3 | 4 | NEAR 的 FT 标准 5 | * [NEP141](https://github.com/near/NEPs/blob/master/neps/nep-0141.md) 6 | * [NEP148](https://github.com/near/NEPs/blob/master/neps/nep-0148.md) 7 | 8 | ## FT 标准实现 9 | NEAR SDK 实现了标准的 FT, 需要额外引入 `near-contract-standards` 10 | ```toml 11 | [dependencies] 12 | near-sdk = "4.1.1" 13 | near-contract-standards = "4.1.1" 14 | ``` 15 | 16 | 其中的 `FungibleToken` 类型即 FT 标准实现, 我们可以将其作为合约的一个字段, 然后把它的实现封装成合约方法. 17 | 标准 FT 不仅实现了 NEP141 和 NEP148, 还实现了存储管理 [NEP145](https://github.com/near/NEPs/blob/master/neps/nep-0145.md) 18 | 19 | ### NEP141 20 | ```rust 21 | pub trait FungibleTokenCore { 22 | // 给普通账户转账. 调用该方法需要附加 1 yocto NEAR 以保证安全性 23 | fn ft_transfer(&mut self, receiver_id: AccountId, amount: U128, memo: Option); 24 | 25 | // 给合约账户转账, 以触发合约相关逻辑, 返回值的含义是实际转账的 FT 数量. 调用该方法需要附加 1 yocto NEAR 以保证安全性 26 | fn ft_transfer_call( 27 | &mut self, 28 | receiver_id: AccountId, 29 | amount: U128, 30 | memo: Option, 31 | msg: String, 32 | ) -> PromiseOrValue; 33 | 34 | // 查询 FT 总供应量 35 | fn ft_total_supply(&self) -> U128; 36 | 37 | // 查询账户持有 FT 的数量 38 | fn ft_balance_of(&self, account_id: AccountId) -> U128; 39 | } 40 | 41 | pub trait FungibleTokenResolver { 42 | // `ft_transfer_call` 内部的回调函数 43 | fn ft_resolve_transfer( 44 | &mut self, 45 | sender_id: AccountId, 46 | receiver_id: AccountId, 47 | amount: U128, 48 | ) -> U128; 49 | } 50 | ``` 51 | 52 | `near-contract-standards` 提供了 `impl_fungible_token_core` 宏来快速给合约实现上述接口 53 | 54 | ### NEP 145 55 | ```rust 56 | pub trait StorageManagement { 57 | // 注册 FT 持有者信息并支付存储费. 调用该方法需要附加一定量的 NEAR 作为存储费 58 | fn storage_deposit( 59 | &mut self, 60 | account_id: Option, 61 | registration_only: Option, 62 | ) -> StorageBalance; 63 | 64 | // 提取用户已支付的存储费. 调用该方法需要附加 1 yocto NEAR 以保证安全性 65 | fn storage_withdraw(&mut self, amount: Option) -> StorageBalance; 66 | 67 | // 注销 FT 持有者信息并返还存储费. 调用该方法需要附加 1 yocto NEAR 以保证安全性 68 | fn storage_unregister(&mut self, force: Option) -> bool; 69 | 70 | // 查询合约对单个用户需要的存储费范围 71 | fn storage_balance_bounds(&self) -> StorageBalanceBounds; 72 | 73 | // 查询用户支付的存储费, 对于未注册的用户返回 `None` 74 | fn storage_balance_of(&self, account_id: AccountId) -> Option; 75 | } 76 | ``` 77 | 78 | `near-contract-standards` 提供了 `impl_fungible_token_storage` 宏来快速给合约实现上述接口 79 | 80 | ### NEP148 81 | ```rust 82 | pub trait FungibleTokenMetadataProvider { 83 | // FT 合约详情 84 | fn ft_metadata(&self) -> FungibleTokenMetadata; 85 | } 86 | ``` 87 | 88 | ## Mint 和 Burn 89 | mint 和 burn 不是标准的操作, 因此我们需要自己实现. 需要注意的是 mint 的时候对于没有注册 FT 持有者信息的用户, 需要先注册再 mint. 90 | 也可以让用户自己从合约外部调用 `storage_deposit` 进行注册并支付存储费, 取决于开发者想怎么实现 91 | 92 | ## 接收合约 93 | 如果一个合约需要感知到自己接收了用户转账的 FT, 则该合约需要实现 `ft_on_transfer` 来触发合约相关操作 94 | ```rust 95 | pub trait FungibleTokenReceiver { 96 | // 接收合约的这个方法会被 `ft_transfer_call` 调用, 返回值的含义是退回的 FT 数量 97 | fn ft_on_transfer( 98 | &mut self, 99 | sender_id: AccountId, 100 | amount: U128, 101 | msg: String, 102 | ) -> PromiseOrValue; 103 | } 104 | ``` 105 | -------------------------------------------------------------------------------- /1. NEAR 区块链核心概念/README.md: -------------------------------------------------------------------------------- 1 | # NEAR 区块链核心概念 2 | NEAR 是一条基于分片的异步区块链, 有一些与其他区块链不同的独特概念 3 | 4 | ## 出块时间 5 | NEAR 的出块时间在 1.2 s 左右 6 | 7 | ## 最终确认 8 | NEAR 的最终确认时间是 1 s 左右 9 | 10 | ## 单位换算 11 | `1 NEAR = 10 ^ 24 yoctoNEAR` 12 | 13 | `1 Tgas = 10 ^ 12 gas`. 单笔交易 gas 消耗上限为 `300 Tgas` 14 | 15 | ## 存储与 gas 价格 16 | NEAR 的存储价格为 `10 ^ -5 NEAR / Byte` 17 | 18 | NEAR 的 gas 价格为 `10 ^ -4 NEAR / Tgas` 19 | 20 | ## 分片 21 | NEAR 是一条全分片区块链, 没有所谓的主链用于协调分片. 22 | 验证节点只处理自己分片的交易, 也只打包自己分片的交易. 23 | 验证节点与分片的对应关系是隐藏的, 且会随周期改变. 24 | 跨分片通信至少需要 2 个区块才能完成 25 | 26 | ## Action 27 | Action 是 NEAR 链上操作的基本单位 28 | 29 | 在 NEAR 上有且仅有以下 8 种 Action 30 | * `Transfer`: 转账 NEAR 31 | * `FunctionCall`: 合约调用 32 | * `CreateAccount`: 创建子账户 33 | * `DeleteAccount`: 删除账户 34 | * `AddKey`: 新增公钥 35 | * `DeleteKey`: 删除公钥 36 | * `Deploy`: 部署合约 37 | * `Stake`: 质押 NEAR 38 | 39 | ## Transaction 40 | Transaction 是由用户私钥签名并支付 gas 费发起的一系列修改链上状态的 Action 的集合 41 | 42 | Transaction 包括几个关键参数 43 | * `signer_id`: 交易签名者 44 | * `receiver_id`: 交易接收者 45 | * `actions`: Action 列表 46 | * `tx_hash`: 最近的任意一笔链上交易的哈希 47 | * `public_key`: 用于验证签名的公钥 48 | * `nonce`: 比公钥当前 nonce 值大的新 nonce 值 49 | 50 | ## Receipt 51 | Receipt 是为了处理跨分片通信而存在的概念 52 | 53 | Transaction 被打包进区块后不会直接执行, 而是先转换为 Receipt, 可以认为 Receipt 是一种可执行的 Transaction 格式. 54 | Receipt 中的 Action 列表会在一个区块内执行完成, 执行具有原子性 55 | 56 | 如果 Action 列表中包含 FunctionCall, 则执行完毕后可能产生新的子 Receipt. 57 | 子 Receipt 会在后面的区块执行, 因此子 Receipt 中的 Action 列表与父 Receipt 中的 Action 列表之间**不具有原子性**. 58 | 产生子 Receipt 是因为被调用的函数内部可能发生了跨合约调用 (FunctionCall Action) 或转账 (Transfer Action) 或其他操作, 这些操作都是异步的, 在函数被调用的那个区块不会执行 59 | 60 | ### Signer, Predecessor, Receiver 61 | Signer 是绝对概念, Predecessor 和 Receiver 是相对概念 62 | 63 | 假设用户 Alice 发起一笔交易调用了 ContractA 合约, ContractA 合约又调用了 ContractB 合约. 64 | 即 Alice -> ContractA -> ContractB. 65 | Signer 始终是 Alice. 66 | 对于 Alice -> ContractA, Predecessor 是 Alice, Receiver 是 ContractA. 67 | 对于 ContractA -> ContractB, Predecessor 是 ContractA, Receiver 是 ContractB 68 | 69 | ## 账户模型 70 | 71 | ### 域名账户 72 | NEAR 的账户是可读域名账户 73 | 74 | 没有 `.` 的账户是顶级账户, 其余都是子账户. 75 | 顶级账户 (32 字符以内) 只能由 [registrar](https://explorer.near.org/accounts/registrar) 创建, 该账户目前受 NEAR Foundation 控制. 76 | 子账户只能由其**直接父账户**创建, 子账户没有级数限制, 只要总长度不超过 64 个字符即可, 父账户对子账户没有控制权. 77 | 通过对公钥的 16 进制编码可以获得一个长度为 64 个字符的账户, 一般称为 Implicit Account, 其本质是一个顶级账户, 由于占满了 64 个字符, 它不能创建子账户 78 | 79 | ### 抽象账户 80 | NEAR 的账户是抽象账户, 可以在指定账户直接部署智能合约 81 | 82 | ### 多密钥对账户 83 | NEAR 的账户是多密钥对账户, 创建一个账户即向链上申请一个账户名, 然后绑定一个公钥到该账户名上, 通过对应的私钥访问该账户, 一个账户上面可以绑定多个公钥 84 | 85 | 密钥分为两种权限 86 | * `FullAccess`: 完全访问权限 87 | * `FunctionCallAccess`: 只允许调用特定的合约方法 88 | 89 | `FunctionCallAccess` 权限的密钥通常在登陆 APP 的时候生成并给到 App 前端, 让 App 能自动帮用户签署低风险交易, 减少用户与钱包交互的频率, 从而优化用户的体验 90 | 91 | ## 私钥 92 | NEAR 使用 ed25519 椭圆曲线 93 | 94 | 私钥 `base58(32 bytes private key + 32 bytes public key)` 原始数据大小为 64 字节, base58 字符串长度为 88 字符 95 | 96 | 公钥 `base58(32 bytes public key)` 原始数据大小为 32 字节, base58 字符串长度为 44 字符 97 | 98 | ## 助记词 99 | NEAR 助记词符合以下规范 100 | * [BIP32](https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki) 101 | * [BIP39](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki) 102 | * [BIP44](https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki) 103 | 104 | ### 派生路径 105 | 助记词通过派生路径转换为私钥 106 | 107 | 默认派生路径为 `m/44'/397'/0'` 108 | 109 | ![master path](./master%20key%20path.png) 110 | 111 | ⚠️ 使用 [Ledger](https://www.ledger.com) 时默认派生路径为 `m/44'/397'/0'/0'/1'` 112 | -------------------------------------------------------------------------------- /5. 跨合约调用与回调函数/src/lib.rs: -------------------------------------------------------------------------------- 1 | mod cross; 2 | 3 | use crate::cross::linkdrop_contract; 4 | use near_sdk::borsh::{self, BorshDeserialize, BorshSerialize}; 5 | use near_sdk::json_types::U128; 6 | use near_sdk::serde::Serialize; 7 | use near_sdk::{ 8 | env, log, near_bindgen, serde_json, AccountId, Gas, GasWeight, PanicOnDefault, Promise, 9 | PromiseError, PromiseOrValue, PublicKey, 10 | }; 11 | 12 | #[near_bindgen] 13 | #[derive(BorshDeserialize, BorshSerialize, PanicOnDefault)] 14 | pub struct Contract { 15 | // Linkdrop 合约地址 16 | linkdrop_contract_id: AccountId, 17 | } 18 | 19 | #[near_bindgen] 20 | impl Contract { 21 | #[init] 22 | pub fn init(linkdrop_contract_id: AccountId) -> Self { 23 | Self { 24 | linkdrop_contract_id, 25 | } 26 | } 27 | } 28 | 29 | #[near_bindgen] 30 | impl Contract { 31 | // 通过 Linkdrop 合约创建一个子账户, 需要支付一定的 NEAR 作为初始余额, 如果创建失败. 则退回这笔费用 32 | // 该方法使用高级 API 编写, 不直接使用 `Promise` 33 | #[payable] // 标记该方法在调用时接受附带的 NEAR 34 | pub fn create_account_by_linkdrop( 35 | &mut self, 36 | new_account_id: AccountId, 37 | new_public_key: PublicKey, 38 | ) -> PromiseOrValue<()> { 39 | let amount = env::attached_deposit(); 40 | // `U128` 是 `u128` 的封装类型, 使用 `String` 的 JSON 序列化方式, 避免大数在序列化之后产生精度丢失 41 | let amount = U128(amount); 42 | 43 | // `ext` 是一个固定的方法 44 | linkdrop_contract::ext(self.linkdrop_contract_id.clone()) 45 | // 附带 NEAR 用于创建账户 46 | .with_attached_deposit(amount.0) 47 | // 创建调用 `create_account` 的 `Promise`, 调用逻辑在当前区块不执行 48 | .create_account(new_account_id, new_public_key) 49 | .then( 50 | // `ext` 是一个固定的方法, 除了使用 `Self::ext` 之外, 也可以像调用 Linkdrop 合约一样先声明接口, 再通过模块进行调用 51 | Self::ext(env::current_account_id()) 52 | // 创建调用 `resolve_create_account` 的 `Promise`, 调用逻辑在当前区块不执行 53 | .resolve_create_account(env::predecessor_account_id(), amount), 54 | ) 55 | .into() 56 | } 57 | } 58 | 59 | #[near_bindgen] 60 | impl Contract { 61 | // 通过 Linkdrop 合约创建一个子账户, 需要支付一定的 NEAR 作为初始余额, 如果创建失败. 则退回这笔费用 62 | // 该方法直接使用 `Promise` 编写, 不使用高级 API, 代码量更大 63 | #[payable] 64 | pub fn create_account_by_linkdrop_using_promise( 65 | &mut self, 66 | new_account_id: AccountId, 67 | new_public_key: PublicKey, 68 | ) -> PromiseOrValue<()> { 69 | let amount = env::attached_deposit(); 70 | let amount = U128(amount); 71 | 72 | #[derive(Serialize)] 73 | #[serde(crate = "near_sdk::serde")] 74 | struct CreateAccountArgs { 75 | new_account_id: AccountId, 76 | new_public_key: PublicKey, 77 | } 78 | 79 | #[derive(Serialize)] 80 | #[serde(crate = "near_sdk::serde")] 81 | struct ResolveCreateAccountArgs { 82 | payer_id: AccountId, 83 | amount: U128, 84 | } 85 | 86 | Promise::new(self.linkdrop_contract_id.clone()) 87 | .function_call_weight( 88 | "create_account".to_string(), 89 | serde_json::to_vec(&CreateAccountArgs { 90 | new_account_id, 91 | new_public_key, 92 | }) 93 | .unwrap(), 94 | amount.0, 95 | Gas(0), 96 | GasWeight(1), 97 | ) 98 | .then( 99 | Promise::new(env::current_account_id()).function_call_weight( 100 | "resolve_create_account".to_string(), 101 | serde_json::to_vec(&ResolveCreateAccountArgs { 102 | payer_id: env::predecessor_account_id(), 103 | amount, 104 | }) 105 | .unwrap(), 106 | 0, 107 | Gas(0), 108 | GasWeight(1), 109 | ), 110 | ) 111 | .into() 112 | } 113 | } 114 | 115 | #[near_bindgen] 116 | impl Contract { 117 | #[private] // 标记该方法只能由合约自己调用 118 | pub fn resolve_create_account( 119 | &mut self, 120 | payer_id: AccountId, 121 | amount: U128, 122 | // 如果被回调的方法有返回值, 可以使用 `#[callback_result]` 来获取返回值 123 | #[callback_result] is_success: Result, 124 | ) { 125 | if is_success.unwrap_or(false) { 126 | log!("Account is successfully created."); 127 | } else { 128 | log!("Failed to create account, refund the money."); 129 | Promise::new(payer_id).transfer(amount.0); 130 | } 131 | } 132 | } 133 | -------------------------------------------------------------------------------- /8. 编写一个 NFT 合约/README.md: -------------------------------------------------------------------------------- 1 | # 编写一个 NFT 合约 2 | NFT 即 Non Fungible Token 非同质化通证 3 | 4 | NEAR 的 NFT 标准 5 | * [NEP171](https://github.com/near/NEPs/blob/master/neps/nep-0171.md) 6 | * [NEP177](https://github.com/near/NEPs/blob/master/neps/nep-0177.md) 7 | * [NEP178](https://github.com/near/NEPs/blob/master/neps/nep-0178.md) 8 | * [NEP181](https://github.com/near/NEPs/blob/master/neps/nep-0181.md) 9 | 10 | ## NFT 标准实现 11 | NEAR SDK 实现了标准的 NFT, 需要额外引入 `near-contract-standards` 12 | ```toml 13 | [dependencies] 14 | near-sdk = "4.1.1" 15 | near-contract-standards = "4.1.1" 16 | ``` 17 | 18 | 其中的 `NonFungibleToken` 类型即 NFT 标准实现, 我们可以将其作为合约的一个字段, 然后把它的实现封装成合约方法 19 | 20 | ### NEP171 21 | ```rust 22 | pub trait NonFungibleTokenCore { 23 | // 给普通账户转移 NFT. 调用该方法需要附加 1 yocto NEAR 以保证安全性 24 | fn nft_transfer( 25 | &mut self, 26 | receiver_id: AccountId, 27 | token_id: TokenId, 28 | approval_id: Option, 29 | memo: Option, 30 | ); 31 | 32 | // 给合约账户转移 NFT, 以触发合约相关逻辑, 返回值的含义是转移是否成功. 调用该方法需要附加 1 yocto NEAR 以保证安全性 33 | fn nft_transfer_call( 34 | &mut self, 35 | receiver_id: AccountId, 36 | token_id: TokenId, 37 | approval_id: Option, 38 | memo: Option, 39 | msg: String, 40 | ) -> PromiseOrValue; 41 | 42 | // 查询某个 NFT 详情 43 | fn nft_token(&self, token_id: TokenId) -> Option; 44 | } 45 | 46 | pub trait NonFungibleTokenResolver { 47 | // `nft_transfer_call` 内部的回调函数 48 | fn nft_resolve_transfer( 49 | &mut self, 50 | previous_owner_id: AccountId, 51 | receiver_id: AccountId, 52 | token_id: TokenId, 53 | approved_account_ids: Option>, 54 | ) -> bool; 55 | } 56 | ``` 57 | 58 | `near-contract-standards` 提供了 `impl_non_fungible_token_core` 宏来快速给合约实现上述接口 59 | 60 | ### NEP 178 61 | ```rust 62 | pub trait NonFungibleTokenApproval { 63 | // 当用户把 NFT 授权给别的账户时, 别的账户就有权转移这个 NFT, 该功能通常用于在 NFT 市场挂单 64 | // 转移 NFT 时, 如果没有传 `approval_id` 参数, 则不校验该值 65 | // 否则必须保证传入的参数和实际值一致才能转移成功, 该校验是为了保护挂单中的 NFT 的安全性 66 | // 当 NFT 成功发生转移之后, 该 NFT 所有的授权都会被重置 67 | // 调用该方法需要附加一些 NEAR 作为被授权账户的存储费 68 | fn nft_approve( 69 | &mut self, 70 | token_id: TokenId, 71 | account_id: AccountId, 72 | msg: Option, 73 | ) -> Option; 74 | 75 | // 取消某个 NFT 对某个账户的授权. 调用该方法需要附加 1 yocto NEAR 以保证安全性 76 | fn nft_revoke(&mut self, token_id: TokenId, account_id: AccountId); 77 | 78 | // 取消某个 NFT 对所有账户的授权. 调用该方法需要附加 1 yocto NEAR 以保证安全性 79 | fn nft_revoke_all(&mut self, token_id: TokenId); 80 | 81 | // 判断 NFT 是否授权给某个账户 82 | // 如果没有传 `approval_id` 参数, 则不校验该值 83 | // 否则必须保证传入的参数和实际值一致才会返回 `true` 84 | fn nft_is_approved( 85 | &self, 86 | token_id: TokenId, 87 | approved_account_id: AccountId, 88 | approval_id: Option, 89 | ) -> bool; 90 | } 91 | ``` 92 | 93 | `near-contract-standards` 提供了 `impl_non_fungible_token_approval` 宏来快速给合约实现上述接口 94 | 95 | ### NEP181 96 | ```rust 97 | pub trait NonFungibleTokenEnumeration { 98 | // 查询 NFT 总供应量 99 | fn nft_total_supply(&self) -> U128; 100 | 101 | // 查询多个 NFT 详情 102 | fn nft_tokens( 103 | &self, 104 | from_index: Option, 105 | limit: Option, 106 | ) -> Vec; 107 | 108 | // 查询某个用户持有的 NFT 数量 109 | fn nft_supply_for_owner(&self, account_id: AccountId) -> U128; 110 | 111 | // 查询某个用户持有的多个 NFT 详情 112 | fn nft_tokens_for_owner( 113 | &self, 114 | account_id: AccountId, 115 | from_index: Option, 116 | limit: Option, 117 | ) -> Vec; 118 | } 119 | ``` 120 | 121 | `near-contract-standards` 提供了 `impl_non_fungible_token_enumeration` 宏来快速给合约实现上述接口 122 | 123 | ### NEP 177 124 | ```rust 125 | pub trait NonFungibleTokenMetadataProvider { 126 | // NFT 合约详情 127 | fn nft_metadata(&self) -> NFTContractMetadata; 128 | } 129 | ``` 130 | 131 | ## Mint 和 Burn 132 | mint 和 burn 不是标准的操作, 因此我们需要自己实现. 需要注意的是 mint NFT 会大量占用存储, 需要关注合约中用于存储质押的 NEAR 是否足够 133 | 134 | ## 接收合约 135 | 如果一个合约需要感知到自己接收了用户转账的 NFT, 则该合约需要实现 `nft_on_transfer` 来触发合约相关操作 136 | ```rust 137 | pub trait NonFungibleTokenReceiver { 138 | // 接收合约的这个方法会被 `nft_transfer_call` 调用, 返回值的含义是是否需要退回 NFT 139 | fn nft_on_transfer( 140 | &mut self, 141 | sender_id: AccountId, 142 | previous_owner_id: AccountId, 143 | token_id: TokenId, 144 | msg: String, 145 | ) -> PromiseOrValue; 146 | } 147 | ``` 148 | 149 | ## 接收授权合约 150 | 如果一个合约需要感知到自己被用户授权了 NFT, 则该合约需要实现 `nft_on_approve` 来触发合约相关操作 151 | ```rust 152 | pub trait NonFungibleTokenApprovalReceiver { 153 | // 接收授权合约的这个方法会被 `nft_approve` 调用, 返回值没有明确含义 154 | fn nft_on_approve( 155 | &mut self, 156 | token_id: TokenId, 157 | owner_id: AccountId, 158 | approval_id: u64, 159 | msg: String, 160 | ) -> PromiseOrValue; 161 | } 162 | ``` 163 | -------------------------------------------------------------------------------- /7. 编写一个 FT 合约/src/lib.rs: -------------------------------------------------------------------------------- 1 | use near_contract_standards::fungible_token::events::{FtBurn, FtMint}; 2 | use near_contract_standards::fungible_token::metadata::{ 3 | FungibleTokenMetadata, FungibleTokenMetadataProvider, FT_METADATA_SPEC, 4 | }; 5 | use near_contract_standards::fungible_token::FungibleToken; 6 | use near_contract_standards::{impl_fungible_token_core, impl_fungible_token_storage}; 7 | use near_sdk::borsh::{self, BorshDeserialize, BorshSerialize}; 8 | use near_sdk::json_types::U128; 9 | use near_sdk::{ 10 | env, near_bindgen, require, AccountId, Balance, BorshStorageKey, PanicOnDefault, PromiseOrValue, 11 | }; 12 | 13 | #[near_bindgen] 14 | #[derive(BorshDeserialize, BorshSerialize, PanicOnDefault)] 15 | pub struct Contract { 16 | owner_id: AccountId, 17 | tokens: FungibleToken, 18 | } 19 | 20 | #[derive(BorshSerialize, BorshStorageKey)] 21 | enum StorageKey { 22 | FungibleToken, 23 | } 24 | 25 | #[near_bindgen] 26 | impl Contract { 27 | #[init] 28 | pub fn init(owner_id: AccountId) -> Self { 29 | Self { 30 | owner_id, 31 | tokens: FungibleToken::new(StorageKey::FungibleToken), 32 | } 33 | } 34 | 35 | // 合约所有者能为任意用户 mint 指定数量的 FT 36 | pub fn mint(&mut self, account_id: AccountId, amount: U128, memo: Option) { 37 | require!( 38 | env::predecessor_account_id() == self.owner_id, 39 | "Only contract owner can call this method." 40 | ); 41 | self.internal_mint(&account_id, amount.0, memo); 42 | } 43 | 44 | // 合约所有者能为任意用户 burn 指定数量的 FT 45 | pub fn burn(&mut self, account_id: AccountId, amount: U128, memo: Option) { 46 | require!( 47 | env::predecessor_account_id() == self.owner_id, 48 | "Only contract owner can call this method." 49 | ); 50 | self.internal_burn(&account_id, amount.0, memo); 51 | } 52 | } 53 | 54 | // 为合约实现 NEP141 55 | // ft_transfer 56 | // ft_transfer_call 57 | // ft_total_supply 58 | // ft_balance_of 59 | // ft_resolve_transfer 60 | impl_fungible_token_core!(Contract, tokens); 61 | 62 | // 为合约实现 NEP145 63 | // storage_deposit 64 | // storage_withdraw 65 | // storage_unregister 66 | // storage_balance_bounds 67 | // storage_balance_of 68 | impl_fungible_token_storage!(Contract, tokens); 69 | 70 | // 为合约实现 NEP148 71 | #[near_bindgen] 72 | impl FungibleTokenMetadataProvider for Contract { 73 | fn ft_metadata(&self) -> FungibleTokenMetadata { 74 | FungibleTokenMetadata { 75 | spec: FT_METADATA_SPEC.to_string(), 76 | name: "Hello Fungible Token".to_string(), 77 | symbol: "HelloFT".to_string(), 78 | icon: None, 79 | reference: None, 80 | reference_hash: None, 81 | decimals: 18, 82 | } 83 | } 84 | } 85 | 86 | // ------------------------------------- 合约内部方法 ------------------------------------------------ 87 | 88 | impl Contract { 89 | pub(crate) fn internal_mint( 90 | &mut self, 91 | account_id: &AccountId, 92 | amount: Balance, 93 | memo: Option, 94 | ) { 95 | // 注册 FT 持有者信息 96 | if !self.tokens.accounts.contains_key(account_id) { 97 | self.tokens.internal_register_account(account_id); 98 | } 99 | 100 | // mint 101 | self.tokens.internal_deposit(account_id, amount); 102 | 103 | // 打印标准 log 104 | FtMint { 105 | owner_id: account_id, 106 | amount: &U128(amount), 107 | memo: memo.as_deref(), 108 | } 109 | .emit(); 110 | } 111 | 112 | pub(crate) fn internal_burn( 113 | &mut self, 114 | account_id: &AccountId, 115 | amount: Balance, 116 | memo: Option, 117 | ) { 118 | // burn 119 | self.tokens.internal_withdraw(account_id, amount); 120 | 121 | // 打印标准 log 122 | FtBurn { 123 | owner_id: account_id, 124 | amount: &U128(amount), 125 | memo: memo.as_deref(), 126 | } 127 | .emit(); 128 | } 129 | } 130 | 131 | #[cfg(test)] 132 | mod test { 133 | use crate::Contract; 134 | use near_contract_standards::fungible_token::core::FungibleTokenCore; 135 | use near_contract_standards::storage_management::StorageManagement; 136 | use near_sdk::json_types::U128; 137 | use near_sdk::test_utils::VMContextBuilder; 138 | use near_sdk::{testing_env, AccountId, Balance, ONE_YOCTO}; 139 | 140 | fn owner() -> AccountId { 141 | "owner.near".parse().unwrap() 142 | } 143 | 144 | fn alice() -> AccountId { 145 | "alice.near".parse().unwrap() 146 | } 147 | 148 | fn bob() -> AccountId { 149 | "bob.near".parse().unwrap() 150 | } 151 | 152 | const ONE_TOKEN: Balance = 1_000_000_000_000_000_000; 153 | 154 | #[test] 155 | fn test_mint_transfer_burn() { 156 | let mut contract = Contract::init(owner()); 157 | 158 | // ----------------------------- 给 Bob mint 1000 FT --------------------------------------- 159 | 160 | testing_env!(VMContextBuilder::new() 161 | .predecessor_account_id(owner()) 162 | .build()); 163 | 164 | contract.mint(bob(), U128(1000 * ONE_TOKEN), None); 165 | 166 | assert_eq!(contract.ft_balance_of(bob()), U128(1000 * ONE_TOKEN)); 167 | assert_eq!(contract.ft_total_supply(), U128(1000 * ONE_TOKEN)); 168 | 169 | // --------------------------- Bob 给 Alice 转账 200 FT ------------------------------------- 170 | 171 | // 给 Alice 注册持有者信息并支付存储费 172 | let storage_balance_bounds = contract.storage_balance_bounds(); 173 | 174 | testing_env!(VMContextBuilder::new() 175 | .predecessor_account_id(bob()) 176 | .attached_deposit(storage_balance_bounds.min.0) 177 | .build()); 178 | 179 | contract.storage_deposit(Some(alice()), None); 180 | 181 | // `ft_transfer` 调用需要附加 1 yocto NEAR 182 | testing_env!(VMContextBuilder::new() 183 | .predecessor_account_id(bob()) 184 | .attached_deposit(ONE_YOCTO) 185 | .build()); 186 | 187 | contract.ft_transfer(alice(), U128(200 * ONE_TOKEN), None); 188 | 189 | assert_eq!(contract.ft_balance_of(bob()), U128(800 * ONE_TOKEN)); 190 | assert_eq!(contract.ft_balance_of(alice()), U128(200 * ONE_TOKEN)); 191 | assert_eq!(contract.ft_total_supply(), U128(1000 * ONE_TOKEN)); 192 | 193 | // ------------------------------ 销毁 Bob 的 300 FT ---------------------------------------- 194 | 195 | testing_env!(VMContextBuilder::new() 196 | .predecessor_account_id(owner()) 197 | .build()); 198 | 199 | contract.burn(bob(), U128(300 * ONE_TOKEN), None); 200 | 201 | assert_eq!(contract.ft_balance_of(bob()), U128(500 * ONE_TOKEN)); 202 | assert_eq!(contract.ft_balance_of(alice()), U128(200 * ONE_TOKEN)); 203 | assert_eq!(contract.ft_total_supply(), U128(700 * ONE_TOKEN)); 204 | } 205 | } 206 | -------------------------------------------------------------------------------- /6. 单元测试与集成测试/tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | /* Visit https://aka.ms/tsconfig to read more about this file */ 4 | 5 | /* Projects */ 6 | // "incremental": true, /* Save .tsbuildinfo files to allow for incremental compilation of projects. */ 7 | // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ 8 | // "tsBuildInfoFile": "./.tsbuildinfo", /* Specify the path to .tsbuildinfo incremental compilation file. */ 9 | // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects. */ 10 | // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ 11 | // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ 12 | 13 | /* Language and Environment */ 14 | "target": "ESNext", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ 15 | // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ 16 | // "jsx": "preserve", /* Specify what JSX code is generated. */ 17 | // "experimentalDecorators": true, /* Enable experimental support for legacy experimental decorators. */ 18 | // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ 19 | // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */ 20 | // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ 21 | // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */ 22 | // "reactNamespace": "", /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */ 23 | // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ 24 | // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ 25 | // "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */ 26 | 27 | /* Modules */ 28 | "module": "CommonJS", /* Specify what module code is generated. */ 29 | // "rootDir": "./", /* Specify the root folder within your source files. */ 30 | // "moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */ 31 | // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ 32 | // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ 33 | // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ 34 | // "typeRoots": [], /* Specify multiple folders that act like './node_modules/@types'. */ 35 | // "types": [], /* Specify type package names to be included without being referenced in a source file. */ 36 | // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ 37 | // "moduleSuffixes": [], /* List of file name suffixes to search when resolving a module. */ 38 | // "allowImportingTsExtensions": true, /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */ 39 | // "resolvePackageJsonExports": true, /* Use the package.json 'exports' field when resolving package imports. */ 40 | // "resolvePackageJsonImports": true, /* Use the package.json 'imports' field when resolving imports. */ 41 | // "customConditions": [], /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */ 42 | // "resolveJsonModule": true, /* Enable importing .json files. */ 43 | // "allowArbitraryExtensions": true, /* Enable importing files with any extension, provided a declaration file is present. */ 44 | // "noResolve": true, /* Disallow 'import's, 'require's or ''s from expanding the number of files TypeScript should add to a project. */ 45 | 46 | /* JavaScript Support */ 47 | // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */ 48 | // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ 49 | // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */ 50 | 51 | /* Emit */ 52 | // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ 53 | // "declarationMap": true, /* Create sourcemaps for d.ts files. */ 54 | // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ 55 | // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ 56 | // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ 57 | // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */ 58 | // "outDir": "./", /* Specify an output folder for all emitted files. */ 59 | // "removeComments": true, /* Disable emitting comments. */ 60 | "noEmit": true, /* Disable emitting files from a compilation. */ 61 | // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ 62 | // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types. */ 63 | // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ 64 | // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ 65 | // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ 66 | // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ 67 | // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ 68 | // "newLine": "crlf", /* Set the newline character for emitting files. */ 69 | // "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */ 70 | // "noEmitHelpers": true, /* Disable generating custom helper functions like '__extends' in compiled output. */ 71 | // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ 72 | // "preserveConstEnums": true, /* Disable erasing 'const enum' declarations in generated code. */ 73 | // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ 74 | // "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */ 75 | 76 | /* Interop Constraints */ 77 | // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ 78 | // "verbatimModuleSyntax": true, /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */ 79 | // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ 80 | "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */ 81 | // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ 82 | "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ 83 | 84 | /* Type Checking */ 85 | "strict": true, /* Enable all strict type-checking options. */ 86 | // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */ 87 | // "strictNullChecks": true, /* When type checking, take into account 'null' and 'undefined'. */ 88 | // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ 89 | // "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */ 90 | // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ 91 | // "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */ 92 | // "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */ 93 | // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ 94 | // "noUnusedLocals": true, /* Enable error reporting when local variables aren't read. */ 95 | // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read. */ 96 | // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ 97 | // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ 98 | // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ 99 | // "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */ 100 | // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ 101 | // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */ 102 | // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ 103 | // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ 104 | 105 | /* Completeness */ 106 | // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ 107 | "skipLibCheck": true /* Skip type checking all .d.ts files. */ 108 | } 109 | } 110 | -------------------------------------------------------------------------------- /8. 编写一个 NFT 合约/src/lib.rs: -------------------------------------------------------------------------------- 1 | use near_contract_standards::non_fungible_token::events::{NftBurn, NftMint}; 2 | use near_contract_standards::non_fungible_token::metadata::{ 3 | NFTContractMetadata, NonFungibleTokenMetadataProvider, TokenMetadata, NFT_METADATA_SPEC, 4 | }; 5 | use near_contract_standards::non_fungible_token::{NonFungibleToken, Token, TokenId}; 6 | use near_contract_standards::{ 7 | impl_non_fungible_token_approval, impl_non_fungible_token_core, 8 | impl_non_fungible_token_enumeration, 9 | }; 10 | use near_sdk::borsh::{self, BorshDeserialize, BorshSerialize}; 11 | use near_sdk::collections::UnorderedSet; 12 | use near_sdk::{ 13 | env, near_bindgen, require, AccountId, BorshStorageKey, PanicOnDefault, Promise, PromiseOrValue, 14 | }; 15 | 16 | #[near_bindgen] 17 | #[derive(BorshDeserialize, BorshSerialize, PanicOnDefault)] 18 | pub struct Contract { 19 | owner_id: AccountId, 20 | tokens: NonFungibleToken, 21 | 22 | // 使用全局自增 id 作为 NFT id 23 | unique_id: u64, 24 | } 25 | 26 | #[derive(BorshSerialize, BorshStorageKey)] 27 | enum StorageKey { 28 | NonFungibleToken, 29 | TokenMetadata, 30 | Enumeration, 31 | Approval, 32 | } 33 | 34 | #[near_bindgen] 35 | impl Contract { 36 | #[init] 37 | pub fn init(owner_id: AccountId) -> Self { 38 | Self { 39 | owner_id: owner_id.clone(), 40 | tokens: NonFungibleToken::new( 41 | StorageKey::NonFungibleToken, 42 | owner_id, 43 | Some(StorageKey::TokenMetadata), 44 | Some(StorageKey::Enumeration), 45 | Some(StorageKey::Approval), 46 | ), 47 | unique_id: 0, 48 | } 49 | } 50 | 51 | // 合约所有者能为任意用户 mint NFT 52 | pub fn mint(&mut self, account_id: AccountId, metadata: TokenMetadata, memo: Option) { 53 | require!( 54 | env::predecessor_account_id() == self.owner_id, 55 | "Only contract owner can call this method." 56 | ); 57 | let token_id = self.next_id().to_string(); 58 | self.internal_mint(&account_id, &token_id, &metadata, memo); 59 | } 60 | 61 | // 合约所有者能为任意用户 burn NFT 62 | pub fn burn(&mut self, account_id: AccountId, token_id: TokenId, memo: Option) { 63 | require!( 64 | env::predecessor_account_id() == self.owner_id, 65 | "Only contract owner can call this method." 66 | ); 67 | self.internal_burn(&account_id, &token_id, memo); 68 | } 69 | } 70 | 71 | // 为合约实现 NEP171 72 | // nft_transfer 73 | // nft_transfer_call 74 | // nft_token 75 | // nft_resolve_transfer 76 | impl_non_fungible_token_core!(Contract, tokens); 77 | 78 | // 为合约实现 NEP178 79 | // nft_approve 80 | // nft_revoke 81 | // nft_revoke_all 82 | // nft_is_approved 83 | impl_non_fungible_token_approval!(Contract, tokens); 84 | 85 | // 为合约实现 NEP181 86 | // nft_total_supply 87 | // nft_tokens 88 | // nft_supply_for_owner 89 | // nft_tokens_for_owner 90 | impl_non_fungible_token_enumeration!(Contract, tokens); 91 | 92 | // 为合约实现 NEP177 93 | #[near_bindgen] 94 | impl NonFungibleTokenMetadataProvider for Contract { 95 | fn nft_metadata(&self) -> NFTContractMetadata { 96 | NFTContractMetadata { 97 | spec: NFT_METADATA_SPEC.to_string(), 98 | name: "Hello Non Fungible Token".to_string(), 99 | symbol: "HelloNFT".to_string(), 100 | icon: None, 101 | base_uri: None, 102 | reference: None, 103 | reference_hash: None, 104 | } 105 | } 106 | } 107 | 108 | // ------------------------------------- 合约内部方法 ------------------------------------------------ 109 | 110 | impl Contract { 111 | pub(crate) fn next_id(&mut self) -> u64 { 112 | self.unique_id += 1; 113 | self.unique_id 114 | } 115 | 116 | pub(crate) fn internal_mint( 117 | &mut self, 118 | account_id: &AccountId, 119 | token_id: &TokenId, 120 | metadata: &TokenMetadata, 121 | memo: Option, 122 | ) { 123 | // 添加 token_id -> token_owner_id 映射 124 | self.tokens.owner_by_id.insert(token_id, account_id); 125 | 126 | // 更新或添加 token_owner_id -> token_ids 映射 127 | if let Some(tokens_per_owner) = &mut self.tokens.tokens_per_owner { 128 | let mut token_ids = tokens_per_owner.get(account_id).unwrap_or_else(|| { 129 | UnorderedSet::new( 130 | near_contract_standards::non_fungible_token::core::StorageKey::TokensPerOwner { 131 | account_hash: env::sha256(&account_id.try_to_vec().unwrap()), // 也可以用 `account_id.as_bytes()`, 但使用 borsh 字节更加通用 132 | }, 133 | ) 134 | }); 135 | token_ids.insert(token_id); 136 | tokens_per_owner.insert(account_id, &token_ids); 137 | } 138 | 139 | // 添加 token_id -> token_metadata 映射 140 | if let Some(token_metadata_by_id) = &mut self.tokens.token_metadata_by_id { 141 | token_metadata_by_id.insert(token_id, metadata); 142 | } 143 | 144 | // 打印标准 log 145 | NftMint { 146 | owner_id: account_id, 147 | token_ids: &[token_id], 148 | memo: memo.as_deref(), 149 | } 150 | .emit(); 151 | } 152 | 153 | pub(crate) fn internal_burn( 154 | &mut self, 155 | account_id: &AccountId, 156 | token_id: &TokenId, 157 | memo: Option, 158 | ) { 159 | // 移除 token_id -> token_owner_id 映射 160 | self.tokens.owner_by_id.remove(token_id); 161 | 162 | // 更新或移除 token_owner_id -> token_ids 映射 163 | if let Some(tokens_per_owner) = &mut self.tokens.tokens_per_owner { 164 | if let Some(mut token_ids) = tokens_per_owner.remove(account_id) { 165 | token_ids.remove(token_id); 166 | if !token_ids.is_empty() { 167 | tokens_per_owner.insert(account_id, &token_ids); 168 | } 169 | } 170 | }; 171 | 172 | // 移除 token_id -> token_metadata 映射 173 | if let Some(token_metadata_by_id) = &mut self.tokens.token_metadata_by_id { 174 | token_metadata_by_id.remove(token_id); 175 | } 176 | 177 | // 移除 token_id -> approval_ids 映射 178 | if let Some(approvals_by_id) = &mut self.tokens.approvals_by_id { 179 | approvals_by_id.remove(token_id); 180 | } 181 | 182 | // 移除 token_id -> next_approval_id 映射 183 | if let Some(next_approval_id_by_id) = &mut self.tokens.next_approval_id_by_id { 184 | next_approval_id_by_id.remove(token_id); 185 | } 186 | 187 | // 打印标准 log 188 | NftBurn { 189 | owner_id: account_id, 190 | token_ids: &[token_id], 191 | authorized_id: Some(account_id), 192 | memo: memo.as_deref(), 193 | } 194 | .emit(); 195 | } 196 | } 197 | 198 | #[cfg(test)] 199 | mod test { 200 | use crate::Contract; 201 | use near_contract_standards::non_fungible_token::approval::NonFungibleTokenApproval; 202 | 203 | use near_contract_standards::non_fungible_token::core::NonFungibleTokenCore; 204 | use near_contract_standards::non_fungible_token::enumeration::NonFungibleTokenEnumeration; 205 | use near_contract_standards::non_fungible_token::metadata::TokenMetadata; 206 | use near_contract_standards::non_fungible_token::TokenId; 207 | 208 | use near_sdk::json_types::U128; 209 | use near_sdk::test_utils::VMContextBuilder; 210 | use near_sdk::{testing_env, AccountId, ONE_NEAR, ONE_YOCTO}; 211 | 212 | fn owner() -> AccountId { 213 | "owner.near".parse().unwrap() 214 | } 215 | 216 | fn alice() -> AccountId { 217 | "alice.near".parse().unwrap() 218 | } 219 | 220 | fn bob() -> AccountId { 221 | "bob.near".parse().unwrap() 222 | } 223 | 224 | fn token(token_id: TokenId) -> TokenMetadata { 225 | TokenMetadata { 226 | title: Some(format!("HelloNFT #{}", token_id)), 227 | description: None, 228 | media: None, 229 | media_hash: None, 230 | copies: None, 231 | issued_at: None, 232 | expires_at: None, 233 | starts_at: None, 234 | updated_at: None, 235 | extra: None, 236 | reference: None, 237 | reference_hash: None, 238 | } 239 | } 240 | 241 | #[test] 242 | fn test_mint_transfer_burn() { 243 | let mut contract = Contract::init(owner()); 244 | 245 | let token_id_1 = "1".to_string(); 246 | let token_1 = token(token_id_1.clone()); 247 | let token_id_2 = "2".to_string(); 248 | let token_2 = token(token_id_2.clone()); 249 | 250 | // --------------------------------- 给 Bob mint NFT --------------------------------------- 251 | 252 | testing_env!(VMContextBuilder::new() 253 | .predecessor_account_id(owner()) 254 | .build()); 255 | 256 | contract.mint(bob(), token_1, None); 257 | contract.mint(bob(), token_2, None); 258 | 259 | assert_eq!( 260 | contract.nft_token(token_id_1.clone()).unwrap().owner_id, 261 | bob() 262 | ); 263 | assert_eq!( 264 | contract.nft_token(token_id_2.clone()).unwrap().owner_id, 265 | bob() 266 | ); 267 | assert_eq!(contract.nft_total_supply(), U128(2)); 268 | 269 | // -------------------------------- Bob 给 Alice 转 NFT ------------------------------------- 270 | 271 | // `nft_transfer` 调用需要附加 1 yocto NEAR 272 | testing_env!(VMContextBuilder::new() 273 | .predecessor_account_id(bob()) 274 | .attached_deposit(ONE_YOCTO) 275 | .build()); 276 | 277 | contract.nft_transfer(alice(), token_id_1.clone(), None, None); 278 | 279 | assert_eq!( 280 | contract.nft_token(token_id_1.clone()).unwrap().owner_id, 281 | alice() 282 | ); 283 | assert_eq!( 284 | contract.nft_token(token_id_2.clone()).unwrap().owner_id, 285 | bob() 286 | ); 287 | assert_eq!(contract.nft_total_supply(), U128(2)); 288 | 289 | // ---------------------------------- 销毁 Bob 的 NFT --------------------------------------- 290 | 291 | testing_env!(VMContextBuilder::new() 292 | .predecessor_account_id(owner()) 293 | .build()); 294 | 295 | contract.burn(bob(), token_id_2.clone(), None); 296 | 297 | assert_eq!(contract.nft_token(token_id_1).unwrap().owner_id, alice()); 298 | assert!(contract.nft_token(token_id_2).is_none()); 299 | assert_eq!(contract.nft_total_supply(), U128(1)); 300 | } 301 | 302 | #[test] 303 | fn test_approve_transfer() { 304 | let mut contract = Contract::init(owner()); 305 | 306 | let token_id = "1".to_string(); 307 | let token = token(token_id.clone()); 308 | 309 | // --------------------------------- 给 Bob mint NFT --------------------------------------- 310 | 311 | testing_env!(VMContextBuilder::new() 312 | .predecessor_account_id(owner()) 313 | .build()); 314 | 315 | contract.mint(bob(), token, None); 316 | 317 | assert_eq!( 318 | contract.nft_token(token_id.clone()).unwrap().owner_id, 319 | bob() 320 | ); 321 | 322 | // ------------------------------- Bob 授权 NFT 给 Alice ------------------------------------ 323 | 324 | // `nft_approve` 需要附加一些 NEAR 作为被授权账户的存储费 325 | testing_env!(VMContextBuilder::new() 326 | .predecessor_account_id(bob()) 327 | .attached_deposit(ONE_NEAR / 100) // 附加 0.01 NEAR 328 | .build()); 329 | 330 | contract.nft_approve(token_id.clone(), alice(), None); 331 | 332 | assert!(contract.nft_is_approved(token_id.clone(), alice(), None)); 333 | 334 | // ---------------------------- Alice 通过授权把 Bob 的NFT 转给自己 --------------------------- 335 | 336 | // `nft_transfer` 调用需要附加 1 yocto NEAR 337 | testing_env!(VMContextBuilder::new() 338 | .predecessor_account_id(alice()) 339 | .attached_deposit(ONE_YOCTO) 340 | .build()); 341 | 342 | contract.nft_transfer(alice(), token_id.clone(), None, None); 343 | 344 | assert_eq!( 345 | contract.nft_token(token_id.clone()).unwrap().owner_id, 346 | alice() 347 | ); 348 | assert!(!contract.nft_is_approved(token_id, alice(), None)); 349 | } 350 | } 351 | -------------------------------------------------------------------------------- /2. 认识 NEAR 智能合约/Cargo.lock: -------------------------------------------------------------------------------- 1 | # This file is automatically @generated by Cargo. 2 | # It is not intended for manual editing. 3 | version = 3 4 | 5 | [[package]] 6 | name = "Inflector" 7 | version = "0.11.4" 8 | source = 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