The wormhole sdk is a new go module in the sdk/ directory. This
initially contains the *_consts.go files from the common package in the
top-level sdk package and the entire vaa package as a sub-package.
For go reasons this needs to be in the sdk directory itself (rather than
a sdk/go subdir). To prevent the go tooling from looking into the other
non-go subdirs, add an empty go.mod file in each one. See
golang issue 42965 for more details on why we can't have nice
things (I'm deliberately not linking to stop github from spamming that
issue).
Any goroutine can push into a channel so the current implementation has
a race condition where the channel can become full immediately after the
length check, causing the subsequent send on the channel to block.
Fix this by wrapping the send on the channel with a select block.
Control will fall through to the default case only if the actual send
operation blocks, avoiding the potential race with other goroutines.
tbjump
Chirantan Ekbote
bruce-riley