Which crate is this feature request for?

payjoin-ffi

Please describe the feature you'd like to see added.

Right now building from source is the default method, which means every user of this repository will need Rust + NDK + platform toolchains set up. This adds a lot of friction for regular Flutter devs who just want to add bdk as a dependency.

Proposal: Support multiple build modes:

Prebuilt - download from GitHub releases, verify checksums, no toolchain needed
Source - opt-in for custom builds, auditing, airgapped environments etc
Auto (default) - try prebuilt first, fall back to source if unavailable or verification fails

Binaries should be version-locked to the resolved package version and verified with SHA256. If download fails or checksum doesn't match, show a clear error with instructions to switch to source mode.
This keeps the zero-setup experience for most users while still supporting advanced use cases.

Is your feature related to a problem, if so please describe it.

No response

Describe the solution you'd like

No response

Describe any alternatives you've considered

No response

Please leave any additional context

No response