feat!: make encrypt/decrypt async

[bdesoky]

BREAKING CHANGE: synchronous encrypt/decrypt callsites removed

TICKET: WCN-174

This pull request focuses on removing deprecated asynchronous encryption and decryption methods in favor of their synchronous (but promise-returning) replacements across multiple modules. It also simplifies and modernizes key verification logic, updates related tests, and cleans up unused imports. The changes ensure consistency and future-proof the codebase by using only the preferred encryption/decryption interfaces.

Encryption/Decryption Method Updates

• Replaced all usage of decryptAsync and encryptAsync with decrypt and encrypt throughout the codebase, including in abstract-eth, abstract-lightning, abstract-substrate, and abstract-utxo modules. This affects key decryption for wallets, tokens, and recovery flows. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18]

Key Verification Logic Refactor

• Removed the deprecated verifyUserPublicKeyAsync function and its usages, updating all references to use the now-async verifyUserPublicKey function instead. Updated the AbstractUtxoCoin class and related files to reflect this change. [1] [2] [3] [4] [5] [6]

Test Suite Modernization

• Updated test files to use the new encryption interface, including making key preparation asynchronous and ensuring all encrypted keys are generated before tests run. [1] [2] [3] [4]

Code Cleanup

• Removed unused imports and deprecated code associated with the old async methods, making the codebase cleaner and easier to maintain. [1] [2] [3]

These changes collectively improve code consistency, remove deprecated interfaces, and prepare the codebase for future updates.

[linear-code]

WCN-174