> For the complete documentation index, see [llms.txt](https://docs.threshold.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.threshold.network/app-development/tbtc-sdk/guides.md).

# Guides

- [Initialize SDK](https://docs.threshold.network/app-development/tbtc-sdk/guides/initialize-sdk.md)
- [Ethereum and Bitcoin mainnet](https://docs.threshold.network/app-development/tbtc-sdk/guides/initialize-sdk/ethereum-and-bitcoin-mainnet.md): This is the most common case when you want to use the SDK to interact with the tBTC bridge on Ethereum and Bitcoin mainnet.
- [Ethereum and Bitcoin testnet](https://docs.threshold.network/app-development/tbtc-sdk/guides/initialize-sdk/ethereum-and-bitcoin-testnet.md): This is the case where you want to use the SDK to interact with the tBTC bridge on Ethereum and Bitcoin testnet.
- [Crosschain](https://docs.threshold.network/app-development/tbtc-sdk/guides/initialize-sdk/crosschain.md): This mode of the SDK will initialize Ethereum, Bitcoin and an L2 to work with tBTC. Compatible with mainnet and testnet.
- [Custom mode](https://docs.threshold.network/app-development/tbtc-sdk/guides/initialize-sdk/custom-mode.md): Apart from the opinionated initialization functions, the SDK provides a flexible TBTC.initializeCustom function for advanced users.
- [Deposit and mint](https://docs.threshold.network/app-development/tbtc-sdk/guides/deposit-and-mint.md)
- [Unmint and redeem](https://docs.threshold.network/app-development/tbtc-sdk/guides/unmint-and-redeem.md)


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