NFT Image Proxy

nft-image-proxy is a javascript/typescript api to interact with NFT Image Proxy to allow for easy image filtering and moderation.

Installation

nft-image-proxy is available via npm. Run npm install nft-image-proxy

Usage

Fetch

To fetch an image, use proxyFetch. This function takes in a server object, the url to fetch, the response type (either ImageProxyDataType.Json or ImageProxyDataType.Raw), and a force flag. If force is set to true, the image will be fetched regardless of if it contains explicit content. If it is set to false, then explicit images will be blocked and a JSON response will be returned which contains a list of moderation labels that the image was found to match with.

import {
  proxyFetch,
  ImageProxyServer,
  ImageProxyDataType,
} from "nft-image-proxy";

const server: ImageProxyServer = {
  url: "https://imgproxy-prod.cryptonomic-infra.tech",
  version: "1.0.0",
  apikey: "myapikey",
};

proxyFetch(
  server,
  "https://upload.wikimedia.org/wikipedia/commons/8/84/Michelangelo%27s_David_2015.jpg",
  ImageProxyDataType.Json,
  false
).then((response) => console.log(response));

Some convenience functions are also available. safeFetch is equivilant to proxyFetch with the force parameter set to false and unsafeFetch is equivilant to proxyFetch with the force parameter set to true.

import { safeFetch, unsafeFetch } from "nft-image-proxy";

safeFetch(server, url, ImageProxyDataType.Json).then(
  (response: FetchResponse | ImageProxyError) => console.log(response)
);

unsafeFetch(server, url, ImageProxyDataType.Json).then(
  (response: FetchResponse | ImageProxyError) => console.log(response)
);

Describe

If the image proxy has seen an image previously, it can return moderation results from its cache before fetching. describe takes in an array of url strings and returns a JSON response containing a description of each image. The status of each image can be either Blocked, Allowed, or NotSeen (if the image hasn't been cached yet).

import { describe } from "nft-image-proxy";

describe(server, [url1, url2, url3]).then(
  (response: DescribeResponse | ImageProxyError) => console.log(response)
);

Report

If an explicit image were to make it past the content moderation provider, a user could also report the image to the proxy with suggested moderation labels.

import { response } from "nft-image-proxy";

report(server, url, [ModerationLabel.Drugs, ModerationLabel.Alcohol]).then(
  (response: ReportResponse | ImageProxyError) => {
    console.log(response);
  }
);

Describe Reports

All of the current reports submitted to the image proxy can be viewed using describeReports

import { describeReports } from "nft-image-proxy";

describeReports(server).then(
  (response: DescribeReportsResponse | ImageProxyError) => console.log(response)
);

Other References

For more information about the image proxy, the request and reponse formats, or how it works, view our public repo here.