What’s the 'transaction malleability flaw' in Bitcoin.. https://video.nostr.build/4f46a1ab6bdc7c68cf1d41ae3447ab9107dcb88581ebf0bfcfc042ddafae458a.mp4 nostr:note1tx7haarqrsuf0r7n4fphww5d643akwegrzu957nw6wf367hd8nasg5dvru