[ECO-2488] Fix emojicoin balance query by using the view function ins…

…tead of the external indexer API (#404)

src/typescript/frontend/src/lib/hooks/queries/use-wallet-balance.ts

@@ -3,6 +3,7 @@ import { useQuery } from "@tanstack/react-query";
 import { withResponseError } from "./client";
 import { useCallback, useMemo, useRef, useState } from "react";
 import { type TypeTagInput } from "@sdk/emojicoin_dot_fun";
+import { Balance } from "@sdk/emojicoin_dot_fun/aptos-framework";
 
 /**
  * __NOTE: If you're using this for a connected user's APT balance, you should use__
@@ -60,12 +61,11 @@ export const useWalletBalance = ({
         return res;
       }
       return withResponseError(
-        aptos
-          .getAccountCoinAmount({
-            accountAddress,
-            coinType: coinType.toString() as `${string}::${string}::${string}`,
-          })
-          .then((r) => BigInt(r))
+        Balance.view({
+          aptos,
+          owner: accountAddress,
+          typeTags: [coinType],
+        }).then((res) => BigInt(res))
       );
     },
     placeholderData: (previousBalance) => previousBalance ?? 0,

src/typescript/sdk/src/emojicoin_dot_fun/aptos-framework.ts

@@ -2,13 +2,13 @@
 import {
   MoveVector,
   AccountAddress,
+  type Aptos,
   U64,
   type AccountAddressInput,
   type Uint64,
   type AptosConfig,
   type InputGenerateTransactionOptions,
   buildTransaction,
-  type Aptos,
   type Account,
   type WaitForTransactionOptions,
   type UserTransactionResponse,
@@ -21,7 +21,7 @@ import {
   EntryFunctionTransactionBuilder,
   ViewFunctionPayloadBuilder,
 } from "./payload-builders";
-import { type TypeTagInput } from ".";
+import { type Uint64String, type TypeTagInput } from ".";
 import { getAptosClient } from "../utils/aptos-client";
 
 export type MintPayloadMoveArguments = {
@@ -365,3 +365,53 @@ export class ExistsAt extends ViewFunctionPayloadBuilder<[boolean]> {
     return res;
   }
 }
+
+export type BalancePayloadMoveArguments = {
+  owner: AccountAddress;
+};
+
+/**
+ *```
+ *  #[view]
+ *  public fun balance<CoinType>(
+ *     owner: address,
+ *  ): u64
+ *```
+ * */
+
+export class Balance extends ViewFunctionPayloadBuilder<[Uint64String]> {
+  public readonly moduleAddress = AccountAddress.ONE;
+
+  public readonly moduleName = "coin";
+
+  public readonly functionName = "balance";
+
+  public readonly args: BalancePayloadMoveArguments;
+
+  public readonly typeTags: [TypeTag]; // [CoinType]
+
+  constructor(args: {
+    owner: AccountAddressInput; // address
+    typeTags: [TypeTagInput]; // [CoinType]
+  }) {
+    super();
+    const { owner, typeTags } = args;
+
+    this.args = {
+      owner: AccountAddress.from(owner),
+    };
+    this.typeTags = typeTags.map((typeTag) =>
+      typeof typeTag === "string" ? parseTypeTag(typeTag) : typeTag
+    ) as [TypeTag];
+  }
+
+  static async view(args: {
+    aptos: Aptos | AptosConfig;
+    owner: AccountAddressInput; // address
+    typeTags: [TypeTagInput]; // [CoinType]
+    options?: LedgerVersionArg;
+  }): Promise<Uint64String> {
+    const [res] = await new Balance(args).view(args);
+    return res;
+  }
+}

src/typescript/sdk/src/emojicoin_dot_fun/index.ts

@@ -1,3 +1,4 @@
+export * as AptosFramework from "./aptos-framework";
 export * as EmojicoinDotFun from "./emojicoin-dot-fun";
 export * from "./types";
 export * from "./utils";