Get the list of identity providers

The list of identity providers can be retrieved from a Concordium node; however, the provided list lacks the necessary metadata for creating or recovering an identity from an identity provider. Therefore, Concordium hosts a service called the wallet-proxy that serves this information to wallets.

Get list of identity providers and their metadata

Here is an example of how the list of identity providers can be retrieved from the wallet-proxy service. The libraries used here to perform the requests are merely examples, so feel free to use the libraries already utilized in your project.

TypeScript (Web)

import {
    IdentityProvider,
} from '@concordium/web-sdk';

interface IdentityProviderMetaData {
    issuanceStart: string;
    recoveryStart: string;
    icon: string;
    support: string;
}

type IdentityProviderWithMetadata = IdentityProvider & {
    metadata: IdentityProviderMetaData;
};

const walletProxyTestnetBaseUrl = 'https://wallet-proxy.testnet.concordium.com';
const walletProxyMainnetBaseUrl = 'https://wallet-proxy.mainnet.concordium.software';

async function getIdentityProviders(walletProxyBaseUrl: string): Promise< IdentityProviderWithMetadata[]> {
    const response = await fetch(walletProxyBaseUrl + '/v1/ip_info');
    return response.json();
}

const testnetIdentityProviders = getIdentityProviders(walletProxyTestnetBaseUrl);
const mainnetIdentityProviders = getIdentityProviders(walletProxyMainnetBaseUrl);

Kotlin (Android)

import com.concordium.sdk.responses.blocksummary.updates.queues.AnonymityRevokerInfo
import com.concordium.sdk.responses.blocksummary.updates.queues.IdentityProviderInfo
import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
import java.io.Serializable
import okhttp3.OkHttpClient
import okhttp3.Request

data class IdentityProvider(
    val ipInfo: IdentityProviderInfo,
    val arsInfos: Map<String, AnonymityRevokerInfo>,
    val metadata: IdentityProviderMetaData
) : Serializable

data class IdentityProviderMetaData(
    val icon: String,
    val issuanceStart: String,
    val support: String?,
    val recoveryStart: String?
) : Serializable

fun getIdentityProviders(walletProxyBaseUrl: String): ArrayList<IdentityProvider> {
    val request = Request.Builder().url("$walletProxyBaseUrl/v1/ip_info").build()
    val client = OkHttpClient().newBuilder().build()

    client.newCall(request).execute().use { response ->
        response.body()?.use { body ->
            val mapper = jacksonObjectMapper()
            return mapper.readValue(body.string(), mapper.typeFactory.constructCollectionType(ArrayList::class.java, IdentityProvider::class.java))
        }
    }
    throw Exception("Something went wrong")
}

fun main() {
    val walletProxyTestnetBaseUrl = "https://wallet-proxy.testnet.concordium.com"
    val walletProxyMainnetBaseUrl = "https://wallet-proxy.mainnet.concordium.software"

    val testnetIdentityProviders = getIdentityProviders(walletProxyTestnetBaseUrl)
    val mainnetIdentityProviders = getIdentityProviders(walletProxyMainnetBaseUrl)
}

Swift (macOS, iOS)

import Concordium
import Foundation

// Inputs.
let walletProxyBaseURL = URL(string: "https://wallet-proxy.testnet.concordium.com")!

let walletProxy = WalletProxy(baseURL: walletProxyBaseURL)
print("Identity providers:")
for ip in try await identityProviders(walletProxy) {
    print("- \(ip.info.description.name)")
}