8d495579e1f0b2bd329d3d299e707491c02a31bd lianad: DesKeyChecker.check() => check the change multipath is not hardened (pythcoiner)
Pull request description:
This PR add a check to verify that the change descriptor is not hardened.
without this check it allow import of invalid (not derivable change) multipath like <0;1'> into a LianaDescriptor.
closes#1183
ACKs for top commit:
jp1ac4:
ACK 8d495579e1f0b2bd329d3d299e707491c02a31bd.
darosior:
ACK 8d495579e1f0b2bd329d3d299e707491c02a31bd
Tree-SHA512: f003fa7b819fa03f84126794b30371419208f1ab4f9e36df2f640dd1c1d20564db7bf1abb9897942e5c43f12e7547f01f07dabf2e8ad1df2e1a3218616883444