feat: add token methods (#11303)

web3.js/module.flow.js

@@ -66,6 +66,14 @@ declare module '@solana/web3.js' {
     skipPreflight: ?boolean,
   };
 
+  declare export type TokenAccountsFilter =
+    | {
+        mint: PublicKey,
+      }
+    | {
+        programId: PublicKey,
+      };
+
   declare export type RpcResponseAndContext<T> = {
     context: Context,
     value: T,
@@ -166,6 +174,23 @@ declare module '@solana/web3.js' {
     root: number,
   };
 
+  declare export type TokenAccountInfo = {
+    mint: PublicKey,
+    owner: PublicKey,
+    amount: number,
+    delegate: null | PublicKey,
+    delegatedAmount: number,
+    isInitialized: boolean,
+    isNative: boolean,
+  };
+
+  declare export type TokenAccount = {
+    executable: boolean,
+    owner: PublicKey,
+    lamports: number,
+    data: TokenAccountInfo,
+  };
+
   declare type AccountChangeCallback = (
     accountInfo: AccountInfo,
     context: Context,
@@ -255,6 +280,21 @@ declare module '@solana/web3.js' {
     getMinimumLedgerSlot(): Promise<number>;
     getFirstAvailableBlock(): Promise<number>;
     getSupply(commitment: ?Commitment): Promise<RpcResponseAndContext<Supply>>;
+    getTokenSupply(
+      tokenMintAddress: PublicKey,
+      commitment: ?Commitment,
+    ): Promise<RpcResponseAndContext<number>>;
+    getTokenAccountBalance(
+      tokenAddress: PublicKey,
+      commitment: ?Commitment,
+    ): Promise<RpcResponseAndContext<number>>;
+    getTokenAccountsByOwner(
+      ownerAddress: PublicKey,
+      filter: TokenAccountsFilter,
+      commitment: ?Commitment,
+    ): Promise<
+      RpcResponseAndContext<Array<{pubkey: PublicKey, account: TokenAccount}>>,
+    >;
     getLargestAccounts(
       config: ?GetLargestAccountsConfig,
     ): Promise<RpcResponseAndContext<Array<AccountBalancePair>>>;