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https://github.com/PrimLabs/Bucket
https://github.com/PrimLabs/Bucket
Last synced: about 2 months ago
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- Host: GitHub
- URL: https://github.com/PrimLabs/Bucket
- Owner: PrimLabs
- Created: 2022-03-10T11:56:17.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2022-10-10T14:31:40.000Z (over 1 year ago)
- Last Synced: 2024-01-07T18:08:56.409Z (5 months ago)
- Language: Motoko
- Size: 7.56 MB
- Stars: 30
- Watchers: 1
- Forks: 7
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
Lists
- awesome-motoko - Bucket - A data bucket library that use stable memory to store files bytes and assist developers to build http response. (Libraries / Storage)
README
# Bucket
The library is a **storage library** for canisters to manage Stable Memory.
As far as we know, canisters that storage data into stable memory have many advantages, such as :
- upgradable (when rts memory goes large)
- larger storage space : Stable Memory can be allocated to 8 GB as present
- no GC cost
Therefore, In order to be compatible with the existing development ecology, we develop two versions :
- [Bucket](#Bucket)
- [Bucket-HTTP](#Bucket-HTTP)
You can use this as simple as using the TireMap.
## Bucket
- First, you need to import Bucket in your project
```motoko
import Bucket "Bucket";
```
- Second, you need to declare a Bucket
**upgrade** ：This means that you can upgrade your canister without discarding files stored in the stablememory. Meanwhile available stablememory will become **aval_stablememory** = **8G - heap memory**
```motoko
let bucket = Bucket.Bucket(true); // true : upgradable, false : unupgradable
```
You have a few more things to do below:
1. you should use a stable entries to store your key-value pairs during upgrade
```motoko
stable var bucket_entries: [(Text,[(Nat64, Nat)])] = [];
```
2. You also need to configure the system function [preupgrade and postupgrade](https://smartcontracts.org/docs/language-guide/upgrades.html#_preupgrade_and_postupgrade_system_methods)
```motoko
system func preupgrade(){
bucket_entries := bucket.preupgrade();
};
system func postupgrade(){
bucket.postupgrade(bucket_entries);
bucket_entries := [];
};
```
**nonupgradable** : This means that if you upgrade your canister, you will discard files stored in the stablememory
```motoko
let bucket = Bucket.Bucket(false); // true : upgradable, false : nonupgradable
```
- Third,configure the **dfx.json**
you should point out how much stable memory pages you want to use in dfx.json(recommendation : 131072)
```motoko
"build" :{
"args": "--max-stable-pages=131072" // the max size is 131072 [131072 = 8G / 64KB(each page size)]
}
```
**[more details please read the demo](https://github.com/PrimLabs/Bucket/blob/main/src/Bucket/example.mo)**
### API
- **put** ：put the value into stablememory,use key to index
if you add it again with the same key, it will overwrite the previous file
```motoko
public func put(key: Text, value : Blob): Result.Result<(), Error>
```
tips: you can transform any type T to Text by using ``debug_show(t: T)``
- **append** ：put the value into stablememory,use key to index
if added again with the same key, it will be merged with the previous file block
```motoko
public func append(key: Text, value : Blob): Result.Result<(), Error>
```
tips: you can transform any type T to Text by using ``debug_show(t: T)``
- **get** : use the key to get the value
```motoko
public func get(key: Text): Result.Result<[Blob], Error>
```
- **preupgrade** : return entries
```motoko
public func preupgrade(): [(Text, [(Nat64, Nat)])]
```
- **postupgrade**
```motoko
public func postupgrade(entries : [(Text, [(Nat64, Nat)])]): ()
```
## Bucket-HTTP
The difference between Bucket-HTTP and Bucket is that Bucket-HTTP has built-in **http_request**, so people can query files through example : **canisterID.raw.ic0.app/static/key**
example
```
https://2fli5-jyaaa-aaaao-aabea-cai.raw.ic0.app/static/0
```
Due to the problem of IC mainnet, HTTP-StreamingCallback cannot work at present, so only files less than or equal to **3M** can be accessed through http.
**We will fix this deficiency as soon as possible.**
[**The preparation is almost the same as the above, just change Bucket to Bucket-HTTP**](#prework)
**[more details please read the demo](https://github.com/PrimLabs/Bucket/blob/main/src/Bucket-HTTP/example.mo)**
### API
- **put** ：put the value into stablememory,use key to index
if you add it again with the same key, it will overwrite the previous file
```motoko
public func put(key: Text, value : Blob): Result.Result<(), Error>
```
tips: you can transform any type T to Text by using ``debug_show(t: T)``
- **append** ：put the value into stablememory,use key to index
if added again with the same key, it will be merged with the previous file block
```motoko
public func append(key: Text, value : Blob): Result.Result<(), Error>
```
tips: you can transform any type T to Text by using ``debug_show(t: T)``
- **get** : use the key to get the value
```motoko
public func get(key: Text): Result.Result<[Blob], Error>
```
- **build_http** : Pass in the function that parses the key in the url,the key is used to get the value
ATTENTION : YOU MUST SET YOUR DECODE FUNCITON OR REWRITE IT AND CALL THE BUILD FUNCTION TO ENABLE IT WHEN YOU NEED TO USE THE HTTP INTERFACE.
```motoko
public func build_http(fn_: DecodeUrl): ()
```
```motoko
public type DecodeUrl = (Text) -> (Text);
```
- **http_request**
```motoko
public func http_request(request: HttpRequest): HttpResponse
```
- **preupgrade** : return entries
```motoko
public func preupgrade(): [(Text, [(Nat64, Nat)])]
```
- **postupgrade**
```motoko
public func postupgrade(entries : [(Text, [(Nat64, Nat)])]): ()
```
## Disclaimer
YOU EXPRESSLY ACKNOWLEDGE AND AGREE THAT USE OF THIS SOFTWARE IS AT YOUR SOLE RISK. AUTHORS OF THIS SOFTWARE SHALL NOT BE LIABLE FOR DAMAGES OF ANY TYPE, WHETHER DIRECT OR INDIRECT.
## Contributing
We'd like to collaborate with the community to provide better data storage standard implementation for the developers on the IC, if you have some ideas you'd like to discuss, submit an issue, if you want to improve the code or you made a different implementation, make a pull request!