add types for sep-43 interface (#185)

* add types for sep-43 interface

* make signerAddress a required return value

* make all returned signerAddress required

@stellar/typescript-wallet-sdk/src/walletSdk/Types/sep43.ts

@@ -0,0 +1,92 @@
+interface Error {
+  message: string; // general description message returned to the client app
+  code: number; // unique error code
+  ext?: Array<string>; // optional extended details
+}
+
+export interface Sep43Interface {
+  /**
+   * Function used to request the public key from the active account
+   *
+   * @return Promise<{ address: string } & { error?: Error }>
+   */
+  getAddress(): Promise<{ address: string } & { error?: Error }>;
+
+  /**
+   * A function to request a wallet to sign a built transaction in its XDR mode
+   *
+   * @param xdr - A Transaction or a FeeBumpTransaction
+   * @param opts - Options compatible with https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0043.md#signtransaction
+   * @param opts.networkPassphrase - The Stellar network to use when signing
+   * @param opts.address - The public key of the account that should be used to sign
+   * @param opts.path - This options is added for special cases like Hardware wallets
+   *
+   * @return Promise<{ signedTxXdr: string; signerAddress: string } & { error?: Error }>
+   */
+  signTransaction(
+    xdr: string,
+    opts?: {
+      networkPassphrase?: string;
+      address?: string;
+      path?: string;
+      submit?: boolean;
+      submitUrl?: string;
+    },
+  ): Promise<
+    { signedTxXdr: string; signerAddress: string } & { error?: Error }
+  >;
+
+  /**
+   * A function to request a wallet to sign an AuthEntry XDR.
+   *
+   * @param authEntry - An XDR string version of `HashIdPreimageSorobanAuthorization`
+   * @param opts - Options compatible with https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0043.md#signauthentry
+   * @param opts.networkPassphrase - The Stellar network to use when signing
+   * @param opts.address - The public key of the account that should be used to sign
+   * @param opts.path - This options is added for special cases like Hardware wallets
+   *
+   * @return - Promise<{ signedAuthEntry: string; signerAddress: string } & { error?: Error }>
+   */
+  signAuthEntry(
+    authEntry: string,
+    opts?: {
+      networkPassphrase?: string;
+      address?: string;
+      path?: string;
+    },
+  ): Promise<
+    { signedAuthEntry: string; signerAddress: string } & { error?: Error }
+  >;
+
+  /**
+   * A function to request a wallet to sign an AuthEntry XDR.
+   *
+   * @param message - An arbitrary string rather than a transaction or auth entry
+   * @param opts - Options compatible with https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0043.md#signmessage
+   * @param opts.networkPassphrase - The Stellar network to use when signing
+   * @param opts.address - The public key of the account that should be used to sign
+   * @param opts.path - This options is added for special cases like Hardware wallets
+   *
+   * @return - Promise<{ signedMessage: string; signerAddress: string } & { error?: Error }>
+   */
+  signMessage(
+    message: string,
+    opts?: {
+      networkPassphrase?: string;
+      address?: string;
+      path?: string;
+    },
+  ): Promise<
+    { signedMessage: string; signerAddress: string } & { error?: Error }
+  >;
+
+  /**
+   * A function to request the current selected network in the wallet. This comes
+   * handy when you are dealing with a wallet that doesn't allow you to specify which network to use (For example Lobstr and Rabet)
+   *
+   * @return - Promise<{ network: string; networkPassphrase: string } & { error?: Error }>
+   */
+  getNetwork(): Promise<
+    { network: string; networkPassphrase: string } & { error?: Error }
+  >;
+}