nearprotocol - 无法从最新的 sdk 编译独立的 ft_example

Question

我试图得到这个例子
https://github.com/near/near-sdk-rs/tree/master/examples/fungible-token
从 sdk 作为独立文件夹在本地构建，所以我将所有 3 个 Cargo.toml 更改为使用

near-sdk = { git = "https://github.com/near/near-sdk-rs.git" }
near-contract-standards = { git = "https://github.com/near/near-sdk-rs.git" }

并得到这个错误

error[E0424]: expected value, found module `self`
  --> ft/src/lib.rs:63:1
   |
63 | near_contract_standards::impl_fungible_token_core!(Contract, token, on_tokens_burned);
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   | |
   | `self` value is a keyword only available in methods with a `self` parameter
   | this function has a `self` parameter, but a macro invocation can only access identifiers it receives from parameters
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find value `sender_id` in this scope
  --> ft/src/lib.rs:63:1
   |
63 | near_contract_standards::impl_fungible_token_core!(Contract, token, on_tokens_burned);
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find value `burned_amount` in this scope
  --> ft/src/lib.rs:63:1
   |
63 | near_contract_standards::impl_fungible_token_core!(Contract, token, on_tokens_burned);
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0424]: expected value, found module `self`
  --> ft/src/lib.rs:65:1
   |
65 | near_contract_standards::impl_fungible_token_ar!(Contract, token, on_account_closed);
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   | |
   | `self` value is a keyword only available in methods with a `self` parameter
   | this function has a `self` parameter, but a macro invocation can only access identifiers it receives from parameters
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find value `account_id` in this scope
  --> ft/src/lib.rs:65:1
   |
65 | near_contract_standards::impl_fungible_token_ar!(Contract, token, on_account_closed);
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find value `balance` in this scope
  --> ft/src/lib.rs:65:1
   |
65 | near_contract_standards::impl_fungible_token_ar!(Contract, token, on_account_closed);
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0308]: mismatched types
  --> ft/src/lib.rs:48:57
   |
48 |         let mut this = Self { token: FungibleToken::new(b"a"), reference, reference_hash };
   |                                                         ^^^^
   |                                                         |
   |                                                         expected struct `Vec`, found `&[u8; 1]`
   |                                                         help: try using a conversion method: `b"a".to_vec()`
   |
   = note: expected struct `Vec<u8>`
           found reference `&'static [u8; 1]`

error[E0308]: mismatched types
  --> ft/src/lib.rs:77:24
   |
77 |             reference: self.reference.clone(),
   |                        ^^^^^^^^^^^^^^^^^^^^^^
   |                        |
   |                        expected enum `std::option::Option`, found struct `std::string::String`
   |                        help: try using a variant of the expected enum: `Some(self.reference.clone())`
   |
   = note: expected enum `std::option::Option<std::string::String>`
            found struct `std::string::String`

error[E0308]: mismatched types
  --> ft/src/lib.rs:78:29
   |
78 |             reference_hash: self.reference_hash.clone(),
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |                             |
   |                             expected enum `std::option::Option`, found struct `Base64VecU8`
   |                             help: try using a variant of the expected enum: `Some(self.reference_hash.clone())`
   |
   = note: expected enum `std::option::Option<Base64VecU8>`
            found struct `Base64VecU8`

error: aborting due to 9 previous errors

Some errors have detailed explanations: E0308, E0424, E0425.
For more information about an error, try `rustc --explain E0308`.
error: could not compile `fungible-token`

当我尝试使用以下版本的 crate 时

near-sdk = { version = "=3.0.0-pre.2" }
near-contract-standards = { version = "=0.1.0-pre.2"}

我收到这个错误

error: no rules expected the token ,
  --> ft/src/lib.rs:63:67
   |
63 | near_contract_standards::impl_fungible_token_core!(Contract, token, on_tokens_burned);
   |                                                                   ^ no rules expected this token in macro call

error[E0432]: unresolved import near_contract_standards::fungible_token::metadata::FT_METADATA_SPEC
  --> ft/src/lib.rs:19:59
   |
19 |     FungibleTokenMetadata, FungibleTokenMetadataProvider, FT_METADATA_SPEC,
   |                                                           ^^^^^^^^^^^^^^^^ no FT_METADATA_SPEC in fungible_token::metadata

error[E0433]: failed to resolve: could not find impl_fungible_token_ar in near_contract_standards
  --> ft/src/lib.rs:65:26
   |
65 | near_contract_standards::impl_fungible_token_ar!(Contract, token, on_account_closed);
   |                          ^^^^^^^^^^^^^^^^^^^^^^ could not find impl_fungible_token_ar in near_contract_standards

warning: unused import: PromiseOrValue
  --> ft/src/lib.rs:24:76
   |
24 | use near_sdk::{env, log, near_bindgen, AccountId, Balance, PanicOnDefault, PromiseOrValue};
   |                                                                            ^^^^^^^^^^^^^^
   |
   = note: #[warn(unused_imports)] on by default

error[E0560]: struct FungibleTokenMetadata has no field named spec
  --> ft/src/lib.rs:71:13
   |
71 |             spec: FT_METADATA_SPEC.to_string(),
   |             ^^^^ FungibleTokenMetadata does not have this field
   |
   = note: available fields are: version, name, symbol, reference, decimals

error[E0560]: struct FungibleTokenMetadata has no field named icon
  --> ft/src/lib.rs:74:13
   |
74 |             icon: Some(
   |             ^^^^ FungibleTokenMetadata does not have this field
   |
   = note: available fields are: version, name, symbol, reference, decimals

error[E0560]: struct FungibleTokenMetadata has no field named reference_hash
  --> ft/src/lib.rs:78:13
   |
78 |             reference_hash: self.reference_hash.clone(),
   |             ^^^^^^^^^^^^^^ FungibleTokenMetadata does not have this field
   |
   = note: available fields are: version, name, symbol, reference, decimals

error: aborting due to 6 previous errors; 1 warning emitted

我也不得不注释掉 # source ../flags.sh在 build.sh ，这是我在 ./build.sh 时遇到的错误
这个问题的原因可能是什么？请就如何进行提供建议，我将不胜感激，因为我仍在弄清楚这个新的可爱的生态系统:)

Answer 1

感谢您的关注并解释您的尝试。在您发布此消息时，可替代代币的示例在媒体上很火爆。 crate 尚未发布，因为有一些依赖性需要解决。
为了确保我了解您的流程，您是否复制/粘贴了 fungible-token其他地方的目录？
如果您运行 build.sh那个目录中的文件，它编译吗？这应该。如果您运行 rustc --version我们能得到那个值吗？对我来说是 rustc 1.47.0 (18bf6b4f0 2020-10-07) .另外，请确保您已为目标执行此操作:

rustup target add wasm32-unknown-unknown

也许你可以浏览一下这个介绍以确保基础知识正常工作: https://docs.near.org/docs/develop/contracts/rust/intro
此外，请随时联系 https://near.chat我们尽最大努力回答可能需要多一点来回的问题。很高兴你这么快找到了那个例子!它是如此新鲜，它仍然在窗台上，冒着热气。