nomicon | Implementation walkthrough of the NearProtocol client | Development Tools library

 by   nearprotocol Shell Version: Current License: No License

kandi X-RAY | nomicon Summary

kandi X-RAY | nomicon Summary

nomicon is a Shell library typically used in Utilities, Development Tools applications. nomicon has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Implementation details of the NearProtocol client.
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              nomicon has a low active ecosystem.
              It has 5 star(s) with 3 fork(s). There are 23 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 1 open issues and 0 have been closed. There are 2 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of nomicon is current.

            kandi-Quality Quality

              nomicon has no bugs reported.

            kandi-Security Security

              nomicon has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              nomicon does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              nomicon releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            nomicon Key Features

            No Key Features are available at this moment for nomicon.

            nomicon Examples and Code Snippets

            No Code Snippets are available at this moment for nomicon.

            Community Discussions

            QUESTION

            How can I load all entries of a Vec of arbitrary length onto the stack?
            Asked 2021-Jun-13 at 11:36

            I am currently working with vectors and trying to ensure I have what is essentially an array of my vector on the stack. I cannot call Vec::into_boxed_slice since I am dynamically allocating space in my Vec. Is this at all possible?

            Having read the Rustonomicon on how to implement Vec, it seems to stride over pointers on the heap, dereferencing at each entry. I want to chunk in Vec entries from the heap into the stack for fast access.

            ...

            ANSWER

            Answered 2021-Feb-02 at 02:09

            You can use the unsized_locals feature in nightly Rust:

            Source https://stackoverflow.com/questions/66002645

            QUESTION

            Why can a generic lifetime parameter in Rust be specialized to two disjoint lifetimes for one object?
            Asked 2021-Jun-06 at 05:06

            In the following piece of code, I am trying to understand how the generic lifetime parameter 'a is specialized.

            ...

            ANSWER

            Answered 2021-May-22 at 22:32

            You are thinking about lifetime in the wrong way. The lifetime of r doesn't get specialized into neither 'x nor 'y. It has its own lifetime (lets call it 'r).

            As explained in the Non-Lexical Lifetimes RFC, the lifetime of a value (or its scope as the RFC calls it) is the points on the program where the value may still be used in the future. Crucially, lifetimes aren't necessarily linear, nor do they have to fit to a specific syntax scope (i.e. a {} block). Additionally, lifetimes aren't connected to a variable (like r), but the values they are bound to. Therefore, if you assign to a variable (i.e. r = ..), you effectively killing one value and starting another. It doesn't count as a usage. However, assigning to a member of a value (i.e. r.0 = ..), is a usage, since you are changing a small part of an existing value.

            In your case, 'r has two starting points and two end points. The first start point is at r = Wrapper(&x); and the first endpoint is at the first drop(r). The second start and end points are in the y-block. Visualized:

            Source https://stackoverflow.com/questions/67632034

            QUESTION

            What is local receipt in NEAR Protocol?
            Asked 2021-May-26 at 16:27

            According to nomicon, local receipts are only created during transaction-to-receipt conversion; is this accurate?

            Is the only reason for its existence is optimization of [at least] one block delay when transaction sender account id is equal to the receiver account id?

            ...

            ANSWER

            Answered 2021-May-26 at 16:27

            There are 2 reasons:

            1. Optimize the execution for transactions on the same account. This saves us a few reads and serialization and executes faster.
            2. Original goal: Allow to execute staking operation on a congested shard. Because the staking operation is performed on your own account, such transaction will be executed in front of the delayed queue of the receipts. This assumption is likely to change if NEAR Protocol switches to different receipt priority, e.g. based on gas price or some premium.

            EDIT: To answer the first question. The local receipt can only be created from a conversion of a transaction to a receipt.

            Source https://stackoverflow.com/questions/67678135

            QUESTION

            How can a dynamically-sized object be constructed on the heap
            Asked 2021-Apr-20 at 05:05

            Given a Box holding a dyn Trait object, is there any way to construct a Boxed unsized type?

            For example, suppose I have a (potentially) unsized type:

            ...

            ANSWER

            Answered 2021-Apr-20 at 05:05

            The page you linked says:

            Currently the only properly supported way to create a custom DST is by making your type generic and performing an unsizing coercion: …

            (Yes, custom DSTs are a largely half-baked feature for now.)

            The thing you're asking for is entirely reasonable in context — it just doesn't exist yet. The unsizing coercion requires that the size is known at the coercion site.

            I thought it might be interesting to try to make it work anyway by liberally applying unsafe. Don't use this for anything — I am not really familiar with writing good unsafe Rust code and just tinkered with things until it worked. There are probably even ways to get the same thing done with fewer hazards.

            This code is for entertainment purposes only.

            Source https://stackoverflow.com/questions/67171086

            QUESTION

            Borrowing self as mutable and a member of self not possible?
            Asked 2021-Apr-08 at 05:16
            struct State {
                x: i32
            }
            
            trait A {
                fn a(&mut self, b: &i32);
            }
            
            impl A for State {
                fn a(&mut self, b: &i32) {
                    
                }
            }
            
            fn main() {
                let mut a = State{x: 0};
                a.a(&a.x);
            }
            
            ...

            ANSWER

            Answered 2021-Apr-08 at 05:16

            When you call your A::a method, it borrows a whole variable it implemented for. So you can't have immutable references to the same object (or it's content) at the same time.

            Source https://stackoverflow.com/questions/66997539

            QUESTION

            Unable to specify lifetime parameter to solve compilation error
            Asked 2021-Mar-08 at 11:00

            I'm learning Rust by doing small stuffs. I'm currently writing this app so, its first step is to read a config.json file, but I'm having this compilation error that I'm unable to resolve.

            Here's my Cargo.toml dependencies

            ...

            ANSWER

            Answered 2021-Mar-08 at 11:00

            You'll never be able to do what you want as you can't guarantee to the compiler that the closure will NEVER go out of scope for the applications life time (which you'd have to do in this case because the compiler has no idea how long you'll hold on to the &Value reference).

            Instead, since it looks like you're reading the configuration from disk only once why not store it in a static variable with the help of the lazy_static crate.

            Source https://stackoverflow.com/questions/66523009

            QUESTION

            Polymorphic update on struct fields in Rust
            Asked 2021-Mar-03 at 16:48

            Suppose I have a polymorphic type T:

            ...

            ANSWER

            Answered 2021-Mar-03 at 16:48

            You're confusing yourself with the whole T stuff. This should be much easier to analyze. Specifically, read here.

            Source https://stackoverflow.com/questions/66457845

            QUESTION

            Why does rust libc use repr(packed) for struct?
            Asked 2021-Jan-31 at 10:22

            Rust libc use repr(packed) as shown here for struct which will be then passed to system libc. For example, utsname is repr(packed) and then used in fn uname As per the doc mentioned here,

            ...

            ANSWER

            Answered 2021-Jan-31 at 10:22

            Then why does rust libc use repr(packed) and not repr(C) for passing struct to system libc?

            One obvious reason is that the equivalent structures are specified as packed on the C side as well. (Many C compilers support "packed" as a non-standard extension with the same meaning as in Rust.) The definition of epoll_event on Linux confirms this:

            Source https://stackoverflow.com/questions/65967324

            QUESTION

            Is there a way to tell the Rust's drop checker we effectively own a `T` without it being in generic parameters?
            Asked 2021-Jan-25 at 11:04

            Let's say I want to write code like this:

            ...

            ANSWER

            Answered 2021-Jan-24 at 04:49

            I can do other nasty things with this MyBox that have nothing to do with Drop...

            Source https://stackoverflow.com/questions/65866583

            QUESTION

            Why is returning None when of return type option not return the null pointer when T is not a reference
            Asked 2020-Nov-25 at 07:57

            The FFI section in the nomicon states that

            The most common type that takes advantage of the nullable pointer optimization is Option, where None corresponds to null. So Option c_int> is a correct way to represent a nullable function pointer using the C ABI (corresponding to the C type int (*)(int)).

            However, this function does not return null instead returning an address.

            ...

            ANSWER

            Answered 2020-Nov-25 at 01:17

            nullable pointer optimization.

            If the Option contains a pointer type, such as Box then the optimisation can be applied. A u8 cannot be null and is not a pointer, but a Box is an owned pointer to a u8, so the optimisation works there.

            More generally, this optimisation is called "niche-filling" which also applies to a few non-pointer Rust types, notably enums. In the general case this is not safe for FFI though, and therefore doesn't apply to data in #[repr(C)] structs except for pointer types.

            Source https://stackoverflow.com/questions/64997028

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install nomicon

            You can download it from GitHub.

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            gh repo clone nearprotocol/nomicon

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