waas: Add support for signTypedData intent

packages/waas-ethers/src/signer.ts

@@ -57,14 +57,16 @@ export class SequenceSigner extends ethers.AbstractSigner {
   ): Promise<string> {
     await this._ensureNetworkValid(false)
 
-    const typedDataDigest = ethers.TypedDataEncoder.encode(domain, types, value)
-
     const args = {
-      message: typedDataDigest,
+      typedData: {
+        domain,
+        types,
+        message: value,
+      },
       network: await this.getSimpleNetwork(),
       ...authArgs
     }
-    return this.sequence.signMessage(args).then(response => response.data.signature)
+    return this.sequence.signTypedData(args).then(response => response.data.signature)
   }
 
   async signTransaction(_transaction: ethers.TransactionRequest): Promise<string> {

packages/waas/src/auth.ts

@@ -19,7 +19,8 @@ import {
   SignMessageArgs,
   getTimeDrift,
   updateTimeDrift,
-  getLocalTime
+  getLocalTime,
+  SignTypedDataArgs
 } from './intents'
 import {
   FeeOptionsResponse,
@@ -35,10 +36,12 @@ import {
   isMaySentTransactionResponse,
   isSessionAuthProofResponse,
   isSignedMessageResponse,
+  isSignedTypedDataResponse,
   isTimedOutTransactionResponse,
   isValidationRequiredResponse,
   MaySentTransactionResponse,
-  SignedMessageResponse
+  SignedMessageResponse,
+  SignedTypedDataResponse
 } from './intents/responses'
 import { WaasAuthenticator, AnswerIncorrectError, Chain, EmailAlreadyInUseError, Session } from './clients/authenticator.gen'
 import { SimpleNetwork, WithSimpleNetwork } from './networks'
@@ -780,6 +783,13 @@ export class SequenceWaaS {
     return this.trySendIntent(args, intent, isSignedMessageResponse)
   }
 
+  async signTypedData(args: WithSimpleNetwork<SignTypedDataArgs> & CommonAuthArgs): Promise<SignedTypedDataResponse> {
+    await this.updateTimeDrift()
+
+    const intent = await this.waas.signTypedData(await this.useIdentifier(args))
+    return this.trySendIntent(args, intent, isSignedTypedDataResponse)
+  }
+
   private async trySendTransactionIntent(
     intent: SignedIntent<IntentDataSendTransaction>,
     args: CommonAuthArgs

packages/waas/src/base.ts

@@ -28,6 +28,8 @@ import {
   signIntent,
   signMessage,
   SignMessageArgs,
+  signTypedData,
+  SignTypedDataArgs,
   validateSession
 } from './intents'
 import { LocalStore, Store, StoreObj } from './store'
@@ -47,6 +49,7 @@ import {
   IntentDataOpenSession,
   IntentDataSendTransaction,
   IntentDataSignMessage,
+  IntentDataSignTypedData,
   IntentDataValidateSession
 } from './clients/intent.gen'
 import { getDefaultSubtleCryptoBackend, SubtleCryptoBackend } from './subtle-crypto'
@@ -422,6 +425,28 @@ export class SequenceWaaSBase {
     return this.signIntent(packet)
   }
 
+  /**
+   * This method can be used to sign typed data using waas API. It can only be used
+   * after successfully signing in with the `signIn` and `completeSignIn` methods.
+   *
+   * The method does not sign the typed data. It only returns a payload
+   * that must be sent to the waas API to complete the sign process.
+   *
+   * @param chainId The network on which the typed data will be signed
+   * @param typedData  The typed data that will be signed
+   * @return a payload that must be sent to the waas API to complete sign process
+   */
+  async signTypedData(args: WithSimpleNetwork<SignTypedDataArgs> & ExtraArgs): Promise<SignedIntent<IntentDataSignTypedData>> {
+    const packet = signTypedData({
+      chainId: toNetworkID(args.network || this.config.network),
+      ...args,
+      lifespan: args.lifespan ?? DEFAULT_LIFESPAN,
+      wallet: await this.getWalletAddress()
+    })
+
+    return this.signIntent(packet)
+  }
+
   /**
    * This method can be used to send transactions to the waas API. It can only be used
    * after successfully signing in with the `signIn` and `completeSignIn` methods.