Embedded Wallet用モバイルSDK（React Native）

import { install } from "react-native-quick-crypto";
install();

import "react-native-url-polyfill/auto";
import { ReadableStream } from "web-streams-polyfill";
globalThis.ReadableStream = ReadableStream;

import crypto from "react-native-quick-crypto";
global.getRandomValues = crypto.getRandomValues;

export * from "@ethersproject/shims";

import * as ethers from "ethers";

ethers.pbkdf2.register(
  (
    password: Uint8Array,
    salt: Uint8Array,
    iterations: number,
    keylen: number,
    algo: "sha256" | "sha512"
  ) => {
    console.info("Using react-native-quick-crypto for pbkdf2");
    return ethers.hexlify(
      new Uint8Array(
        crypto.pbkdf2Sync(
          password,
          salt,
          iterations,
          keylen,
          algo === "sha256" ? "SHA-256" : "SHA-512"
        )
      )
    );
  }
);

export * from "ethers";

export const sequenceWaas = new SequenceWaaS(
  {
    network: initialNetwork,
    projectAccessKey: projectAccessKey,
    waasConfigKey: waasConfigKey,
  },
  localStorage,
  null,
  new KeychainSecureStoreBackend()
);

const redirectUri = `${iosRedirectUri}:/oauthredirect`;

const scopes = ["openid", "profile", "email"];
const request = new AuthRequest({
  clientId,
  scopes,
  redirectUri,
  usePKCE: true,
  extraParams: {
    audience: webClientId,
    include_granted_scopes: "true",
  },
});

const result = await request.promptAsync({
  authorizationEndpoint: `https://accounts.google.com/o/oauth2/v2/auth`,
});

if (result.type === "cancel") {
  return undefined;
}

const serverAuthCode = result?.params?.code;

const configForTokenExchange: AccessTokenRequestConfig = {
  code: serverAuthCode,
  redirectUri,
  clientId: iosClientId,
  extraParams: {
    code_verifier: request?.codeVerifier || "",
    audience: webClientId,
  },
};

const tokenResponse = await exchangeCodeAsync(configForTokenExchange, {
  tokenEndpoint: "https://oauth2.googleapis.com/token",
});

const userInfo = await fetchUserInfo(tokenResponse.accessToken);

const idToken = tokenResponse.idToken;

if (!idToken) {
  throw new Error("No idToken");
}

try {
  const signInResult = await sequenceWaas.signIn(
    {
      idToken: idToken,
    },
    randomName()
  );

  console.log("signInResult", JSON.stringify(signInResult));
} catch (e) {
  console.log("error", JSON.stringify(e));
}

// Signing a message
const signature = await sequenceWaas.signMessage({ message: "your message" });

// Sending a txn
const txn = await sequenceWaas.sendTransaction({
  transactions: [
    {
      to: walletAddress,
      value: 0,
    },
  ],
});