Function bitcoin_signingprovider::is_solvable

pub fn is_solvable(provider: &SigningProvider, script: &Script) -> bool

| Check whether we know how to sign for | an output like this, assuming we have | all private keys. While this function | does not need private keys, the passed | provider is used to look up public keys | and redeemscripts by hash. | | Solvability is unrelated to whether | we consider this output to be ours. |