@ledgerhq/hw-app-eth/lib-es/services/ledger/nfts.js

Ledger Hardware Wallet Ethereum Application API

import axios from "axios";
import { getLoadConfig } from "./loadConfig";
import { log } from "@ledgerhq/logs";
export const getNFTInfo = async (contractAddress, chainId, userLoadConfig) => {
    const { nftExplorerBaseURL } = getLoadConfig(userLoadConfig);
    if (!nftExplorerBaseURL)
        return;
    const url = `${nftExplorerBaseURL}/${chainId}/contracts/${contractAddress}`;
    const response = await axios
        .get(url)
        .then(r => r.data)
        .catch(e => {
        log("error", "could not fetch from " + url + ": " + String(e));
        return null;
    });
    if (!response)
        return;
    // APDU response specification: https://ledgerhq.atlassian.net/wiki/spaces/WALLETCO/pages/3269984297/NFT-1+NFT+Backend+design#NFT-Metadata-BLOB
    const payload = response["payload"];
    // Collection name length position: 3rd byte -> caracter 4 to 6
    const collectionNameLength = parseInt(payload.slice(4, 6), 16);
    const collectionNameHex = payload.substr(6, collectionNameLength * 2);
    const collectionName = collectionNameHex
        .match(/.{2}/g) // split every 2 characters
        ?.reduce((acc, curr) => (acc += String.fromCharCode(parseInt(curr, 16))), ""); // convert hex to string
    return {
        contractAddress,
        collectionName: collectionName || "",
        data: payload,
    };
};
export const loadNftPlugin = async (contractAddress, selector, chainId, userLoadConfig) => {
    const { nftExplorerBaseURL } = getLoadConfig(userLoadConfig);
    if (!nftExplorerBaseURL)
        return;
    const url = `${nftExplorerBaseURL}/${chainId}/contracts/${contractAddress}/plugin-selector/${selector}`;
    const response = await axios
        .get(url)
        .then(r => r.data)
        .catch(e => {
        log("error", "could not fetch from " + url + ": " + String(e));
        return null;
    });
    if (!response)
        return;
    const payload = response["payload"];
    return payload;
};
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