# guides

- [The range of possible address length](/developer-documentation/aepp-sdk-js/docs/guides/address-length.md)
- [AENS (æternity naming system)](/developer-documentation/aepp-sdk-js/docs/guides/aens.md)
- [Batch Transactions](/developer-documentation/aepp-sdk-js/docs/guides/batch-requests.md)
- [How to build a wallet](/developer-documentation/aepp-sdk-js/docs/guides/build-wallet.md)
- [Connect an æpp to a wallet](/developer-documentation/aepp-sdk-js/docs/guides/connect-aepp-to-wallet.md)
- [Contract Events](/developer-documentation/aepp-sdk-js/docs/guides/contract-events.md)
- [Contracts](/developer-documentation/aepp-sdk-js/docs/guides/contracts.md)
- [Error Handling](/developer-documentation/aepp-sdk-js/docs/guides/error-handling.md)
- [JWT usage](/developer-documentation/aepp-sdk-js/docs/guides/jwt.md)
- [Ledger Hardware Wallet](/developer-documentation/aepp-sdk-js/docs/guides/ledger-wallet.md)
- [Low vs High level API](/developer-documentation/aepp-sdk-js/docs/guides/low-vs-high-usage.md)
- [Aeternity snap for MetaMask](/developer-documentation/aepp-sdk-js/docs/guides/metamask-snap.md)
- [Oracles](/developer-documentation/aepp-sdk-js/docs/guides/oracles.md)
- [PayingForTx (Meta-Transactions)](/developer-documentation/aepp-sdk-js/docs/guides/paying-for-tx.md)
- [Typed data hashing and signing](/developer-documentation/aepp-sdk-js/docs/guides/typed-data.md)
- [Usage with TypeScript](/developer-documentation/aepp-sdk-js/docs/guides/typescript.md)
- [migration](/developer-documentation/aepp-sdk-js/docs/guides/migration.md)
- [Migration to 10.0.0](/developer-documentation/aepp-sdk-js/docs/guides/migration/10.md)
- [Migration to 11.0.0](/developer-documentation/aepp-sdk-js/docs/guides/migration/11.md)
- [Migration to 12.0.0](/developer-documentation/aepp-sdk-js/docs/guides/migration/12.md)
- [Migration to 13.0.0](/developer-documentation/aepp-sdk-js/docs/guides/migration/13.md)
- [Migration to 14.0.0](/developer-documentation/aepp-sdk-js/docs/guides/migration/14.md)
- [Migration to 7.0.0](/developer-documentation/aepp-sdk-js/docs/guides/migration/7.md)
- [Migration to 9.0.0](/developer-documentation/aepp-sdk-js/docs/guides/migration/9.md)