ts: Change type of Provider.publicKey to PublicKey | null

CHANGELOG.md

@@ -75,7 +75,8 @@ The minor version will be incremented upon a breaking change and the patch versi
 - syn: Remove `idl-parse` and `seeds` features ([#2824](https://github.com/coral-xyz/anchor/pull/2824)).
 - ts: Change `accounts` method to no longer accept resolvable accounts ([#2824](https://github.com/coral-xyz/anchor/pull/2824)).
 - ts: `Program` instances use camelCase for everything ([#2824](https://github.com/coral-xyz/anchor/pull/2824)).
-- ts: Remove discriminator functions ([#2824](https://github.com/coral-xyz/anchor/pull/2824)).
+- ts: Remove discriminator functions ([#2838](https://github.com/coral-xyz/anchor/pull/2824)).
+- ts: Change type of `Provider.publicKey` to `PublicKey | null` for compatibility with `WalletContextState` of `@solana/wallet-adapter-react`  ([#2824](https://github.com/coral-xyz/anchor/pull/2838)).
 
 ## [0.29.0] - 2023-10-16
 

ts/packages/anchor/src/program/namespace/account.ts

@@ -344,7 +344,7 @@ export class AccountClient<
   ): Promise<TransactionInstruction> {
     const size = this.size;
 
-    if (this._provider.publicKey === undefined) {
+    if (!this._provider.publicKey) {
       throw new Error(
         "This function requires the Provider interface implementor to have a 'publicKey' field."
       );

ts/packages/anchor/src/provider.ts

@@ -21,7 +21,7 @@ import {
 
 export default interface Provider {
   readonly connection: Connection;
-  readonly publicKey?: PublicKey;
+  readonly publicKey: PublicKey | null;
 
   send?(
     tx: Transaction | VersionedTransaction,