# Brief Introduction
Founded in October 2017, Liebi is a global-oriented decentralized financial service provider. The core team members are all from first-tier Internet companies such as Sina Weibo and Zhihu.

With the long-term exploration and accumulation of blockchain technology, it has launched a number of products such as Liebi pool, Liebi CPU lease and so on. Committed to providing safe, stable and nice experience of decentralized financial products for global users.

# Ways of Challenge
## Online Challenge
```
Fee: 1 KSM/Challenge
Regional: No Limit
Code Expiration: 12 Hours
```

- **Email Challenge**
    - Send a message containing `challenge code` and `identy info` to the challenged email
    - Use challenged address to sign email content, reply the signature to Registrar's email
    - Registrar using address to verify signature, verification success or failure
- **Social account riot\twitter\facebook etc. Challenge**
    - Send a message containing `challenge code` and `identy info` to the Social account by private message
    - Use challenged address to sign private message, reply the signature to Registrar's social account
    - Registrar using address to verify signature, verification success or failure

- **Website Challenge**
    - Send a message containing `challenge code` and `identy info` to the challenged email
    - Use challenged address to sign email content, choose one of the following methods
        - Place the signature in the website directory `.challenge/sign_message.txt`
        - Added `_dnsauth.domain TXT parsing content` using signature
    - Registrar using address to verify signature, verification success or failure

> Complete the above steps to get the `Reasonable` judgement

## Offline F2F(Face to Face) Challenge
```
Fee: 3-5 KSM/Challenge
Regional: Only Shanghai, China
Code Expiration: 48 Hours
```

- **Legal name Challenge**
    - Send a message containing `challenge code` and `identy info` to the challenged email
    - Use challenged address to sign email content, challenger print signature on the paper
    - The challenger show the `business license/IDs/passport` with legal name and signature paper to the registrar when F2F
    - Registrar completes the challenge after verifying the signature from paper

- **Reputation Challenge**
    - Send a message containing `challenge code` and `identy info` to the challenged email
    - Use challenged address to sign email content, challenger print signature on the paper
    - When the challenger participates in the `conference/workshop as a speaker offline`, challenger will show signature paper to the registrar when F2F
    - Registrar completes the challenge after verifying the signature from paper

> Complete the above steps to get the `KnowGood` judgement

## Other Judgement
If in the above judgement challenge, the challenged person has any attempt to defraud the Registrar, such as forging a phishing account, provide forged business license, etc. Once the fraud is confirmed by the Registrar, it will receive a `LowQuality` judgement.

All accounts judgement by Liebi Registrar are valid for 1 year, and need to be re-challenged after the expiration. If they are not re-challenged, they will be modified to `OutOfDate` judgement.

## Judgement Fee
```
Registrar Fee: 5 KSM (Default)
Online Challenge: 1 KSM/Challenge
Offline F2F Challenge: 3-5 KSM/Challenge
```

> Challenger can get a refund or provide an additional fee according to their needs

# Sign & Verify
- Generate Signature
    - Using https://polkadot.js.org/apps/#/toolbox/sign
    - Paste the JSON Content (including challenge code) received by email/pm/other into `sign the following data`
    - Click `sign message` to sign
    - Deliver the `signature` to the registrar for verification as described in the **Ways of Challenge**

- Verify Signature
    - Using https://polkadot.js.org/apps/#/toolbox/verify
    - Enter the challenger's KSM Address into `verify using address`
    - Paste the JSON Content (including Challenge Code) received by email/pm/other into `using the following data`
    - Fill `signature` into `the supplied signature`
    - If the result returns `success`, the verification is passed, and if it returns `failed`, the verification fails.

# Community & Partner
Based on years of community accumulation, Liebi has established a technical community of about 2,000 people. Among them are potential Validators, technical geeks, KOL and other high-quality accounts that need to be provided by judgement.

We will strictly review identity information such as Email, Legal name, Twitter, Riot, etc. Adhere to the concept of having signature characters to be trusted. At the same time, our team is mainly based in Shanghai, China. Shanghai is a city where the Chinese blockchain industry gathers, and there will be many opportunities to contact teams that require offline certification to give a KnowGood judgement.

# Contact us
Website: https://liebi.com

Email: hello@liebi.com

 Add a registrar to the system.

 The dispatch origin for this call must be `RegistrarOrigin` or `Root`.

 - `account`: the account of the registrar.

 Emits `RegistrarAdded` if successful.

 # <weight>
 - `O(R)` where `R` registrar-count (governance-bounded).
 - One storage mutation (codec `O(R)`).
 - One event.
 # </weight>


- Founded in October 2017, Liebi is a decentralized financial service provider
- Liebi offers a number of products such as Liebi pool, Liebi CPU lease, etc
- Liebi provides Online and Offline(F2F) judgements:
  - Online Challenge: Fee: 1 KSM/Challenge; Regional: No Limit; Code Expiration: 12 Hours
  - Offline Face to Face Challenge: Fee: 3-5 KSM/Challenge; Regional: Only Shanghai, China; Code Expiration: 48 Hours
  - Other Judgements: Reasonable, KnowGood, LowQuality, OutOfDate
- Registar Fee: 5 KSM (Default)
- Generate & Verify Signature: Using the tools on Polkadot.js.org
- Established a Technical Community with 2,000 people. Based in Shanghai, China

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