fix: don't use internal types in the public API

src/api.ts

@@ -24,6 +24,14 @@ export enum BtcAccountType {
   P2wpkh = 'bip122:p2wpkh',
 }
 
+/**
+ * Supported account types.
+ */
+export type KeyringAccountType =
+  | `${EthAccountType.Eoa}`
+  | `${EthAccountType.Erc4337}`
+  | `${BtcAccountType.P2wpkh}`;
+
 /**
  * A struct which represents a Keyring account object. It is abstract enough to
  * be used with any blockchain. Specific blockchain account types should extend

src/eth/utils.ts

@@ -1,11 +1,12 @@
+import type { KeyringAccountType } from '../api';
 import { EthAccountType } from '../api';
-import type { InternalAccountType } from '../internal';
 
 /**
  * Checks if the given type is an EVM account type.
+ *
  * @param type - The type to check.
  * @returns Returns true if the type is an EVM account type, false otherwise.
  */
-export function isEvmAccountType(type: InternalAccountType | string): boolean {
+export function isEvmAccountType(type: KeyringAccountType): boolean {
   return type === EthAccountType.Eoa || type === EthAccountType.Erc4337;
 }