Rather than polling for interesting bitcoin txs via importaddress, we use
the chain topology to register our interest directly.x
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This gets the median time of the block the tx is in. If there is more
than one (different tips), it gets the last median time.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This allows us to track precise transaction depth ourselves,
particularly in the case of branching.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
