feat(Asset): return raw assets amount

packages/snap/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Add `rawAmount` to balance responses and events for precision in balance calculations ([#573](https://github.com/MetaMask/snap-bitcoin-wallet/pull/573))
+
 ## [1.8.0]
 
 ### Changed

packages/snap/integration-test/keyring.test.ts

@@ -459,6 +459,7 @@ describe('Keyring', () => {
       [Caip19Asset.Regtest]: {
         amount: '500',
         unit: CurrencyUnit.Regtest,
+        rawAmount: '50000000000',
       },
     });
   });

packages/snap/src/handlers/KeyringHandler.test.ts

@@ -64,7 +64,9 @@ describe('KeyringHandler', () => {
   const mockAccount = mock<BitcoinAccount>({
     id: 'some-id',
     addressType: 'p2wpkh',
-    balance: { trusted_spendable: { to_btc: () => 1 } },
+    balance: {
+      trusted_spendable: { to_btc: () => 1, to_sat: () => BigInt(100000000) },
+    },
     network: 'bitcoin',
     derivationPath: ['myEntropy', "84'", "0'", "0'"],
     entropySource: 'myEntropy',
@@ -500,6 +502,7 @@ describe('KeyringHandler', () => {
         [Caip19Asset.Bitcoin]: {
           amount: '1',
           unit: 'BTC',
+          rawAmount: '100000000',
         },
       };
 

packages/snap/src/handlers/KeyringHandler.ts

@@ -306,12 +306,15 @@ export class KeyringHandler implements Keyring {
     id: string,
   ): Promise<Record<CaipAssetType, Balance>> {
     const account = await this.#accountsUseCases.get(id);
-    const balance = account.balance.trusted_spendable.to_btc().toString();
+    const trustedSpendable = account.balance.trusted_spendable;
+    const balance = trustedSpendable.to_btc().toString();
+    const rawBalance = trustedSpendable.to_sat().toString();
 
     return {
       [networkToCaip19[account.network]]: {
         amount: balance,
         unit: networkToCurrencyUnit[account.network],
+        rawAmount: rawBalance,
       },
     };
   }

packages/snap/src/infra/SnapClientAdapter.ts

@@ -104,13 +104,16 @@ export class SnapClientAdapter implements SnapClient {
   async emitAccountBalancesUpdatedEvent(
     account: BitcoinAccount,
   ): Promise<void> {
-    const balance = account.balance.trusted_spendable.to_btc().toString();
+    const trustedSpendable = account.balance.trusted_spendable;
+    const balance = trustedSpendable.to_btc().toString();
+    const rawBalance = trustedSpendable.to_sat().toString();
     return emitSnapKeyringEvent(snap, KeyringEvent.AccountBalancesUpdated, {
       balances: {
         [account.id]: {
           [networkToCaip19[account.network]]: {
             amount: balance,
             unit: networkToCurrencyUnit[account.network],
+            rawAmount: rawBalance,
           },
         },
       },