21.dev
Equipping developers with the tools they need today to build the Bitcoin apps of tomorrow.
© 2026 Timechain Software Initiative, Inc. All rights reserved. | Licensed under MIT
Packages
Open-source Swift packages for Bitcoin development. From cryptographic primitives to foundational C/C++ dependencies.
P256K
Swift wrapper for libsecp256k1 with ECDSA, Schnorr, ECDH, and MuSig2. Type-safe APIs and Swift Package Manager support for Bitcoin and Nostr apps.
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swift-event
Swift package for libevent, a portable event notification library used for building scalable network services.
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swift-openssl
Swift package for OpenSSL, providing cryptographic functions and TLS support as a foundational dependency.
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swift-boost
Swift package for Boost C++ libraries, providing portable foundational utilities used by higher-level packages.
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Equipping developers with the tools they need today to build the Bitcoin apps of tomorrow.
© 2026 Timechain Software Initiative, Inc. All rights reserved. | Licensed under MIT