Struct PendingBranchWelcome 

pub struct PendingBranchWelcome { /* private fields */ }

Available on 32-bit or 64-bit only.

A subgroup-branch Welcome whose GroupSecrets have been decrypted but not yet staged.

This lets a receiver read which parent group and epoch the branch derives from before committing to a BranchInfo. The decrypted state is carried here and reused when finishing the join. Create it with StagedWelcome::process_branch_welcome, read the parent reference with Self::parent, then finish with Self::build_from_branch.

Implementations

impl PendingBranchWelcome

pub fn parent(&self) -> Option<(GroupId, GroupEpoch)>

The parent group and epoch this branch derives from, read from the branch resumption PSK carried in the Welcome.

Use this to select the BranchInfo exported from the matching parent epoch before calling Self::build_from_branch.

Returns None if the Welcome carries no branch resumption PSK, i.e. it is not a subgroup-branch welcome.

pub fn build_from_branch<'a, Provider: OpenMlsProvider>( self, provider: &'a Provider, branch_info: BranchInfo, ) -> Result<JoinBuilder<'a, Provider>, WelcomeError<Provider::StorageError>>

Finish the subgroup-branch join with the selected BranchInfo, reusing the already-decrypted state (no second decrypt of the Welcome).

The branch PSK’s parent reference is checked against branch_info (see StagedWelcome::build_from_branch); a branch_info from the wrong parent epoch fails with WelcomeError::SubgroupParentMismatch. The remaining receiver checks run when JoinBuilder::build is called.