feat: add aptos chain support to hdwallet

[NeOMakinG]

Add Aptos blockchain support to hdwallet-core and hdwallet-native, enabling Ed25519 key derivation and BLAKE2b-256 address generation.

Changes

HDWallet Core

• Added aptos.ts with Aptos wallet types and interfaces
• Added AptosWallet, AptosWalletInfo interfaces
• Added AptosGetAddress, AptosSignTx, AptosSignedTx types
• Added aptosGetAccountPaths(), aptosDescribePath() utilities
• Added SLIP-44 coin type 637 for Aptos
• Exported Aptos types from index

HDWallet Native

• Created aptos.ts wallet mixin
• aptosInitializeWallet(): Initialize with Ed25519 master key
• aptosGetAddress(): Derive address from BIP32 path
• aptosSignTx(): Sign transactions using Ed25519
• aptosWipe(): Clean up adapter
• Created crypto/isolation/adapters/aptos.ts for key operations
• BLAKE2b-256 address generation from Ed25519 public key
• Transaction signing with hash-then-sign pattern
• Integrated with NativeHDWallet class

Technical Details

Address Generation

• Derivation Path: m/44'/637'/'/0'/0'
• Algorithm: Ed25519 (same as Solana, Near, Sui)
• Address Format: BLAKE2b-256(Ed25519PublicKey) → 64 hex chars
• Example: 0x1a2b3c...

Transaction Signing

• Signer: Ed25519
• Hash: BLAKE2b-256 of transaction bytes
• Signature: 64 bytes (Ed25519)
• Output: 64 hex bytes signature + 32 hex bytes public key

Configuration

{
"name": "Aptos",
"slip44": 637,
"nativeCurrency": {
"name": "Aptos",
"symbol": "APT",
"decimals": 8
}
}

Testing

Ready for integration testing with web-chain and Playwright MCP.

Related Issues

Closes: #[Aptos Implementation]

[vercel]

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Project	Deployment	Review	Updated (UTC)
hdwallet	Ready	Preview, Comment	Jan 16, 2026 1:04pm

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feature/aptos-support

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