# Resolver

Resolver records the DID user personal information (eg: `name`, `avatar`, `blockchain address`). DID user can display the personal information by resolver contract. all of the information is optional.

### Architecture

<figure><img src="/files/pX1ulrY2mGVtnTsMtIhH" alt=""><figcaption></figcaption></figure>

### Core

The `tokenId` is used as the core to bind all information together. TokenId and DID are one-to-one mappings relationship in the DID contract. DID is essentially a non-transferable NFT. Setting DID resolver information is equivalent to setting additional metadata for NFTS.


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