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Cryptographic requirements for random numbers on substrate chain

As far as I know, one of the possibilities to generate random numbers within a substrate chain is by using the pallet_insecure_randomness_collective_flip. However, the documentation explicitly states ...
nhussein11's user avatar
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How to sign with private key(Not secret key) that was created by "RFC-8032"(described below contents) on offline?

Backgrounds I am working on "ASTAR" parachain scene(TestNet: Shibuya). I can sign message(unsigned-transaction) on offline environment and then broadcast signed-messaged(signed-transaction). ...
JOHNNY JI's user avatar
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`sp_io::crypto::ed25519_batch_verify` was removed amid Polkadot 0.9.39 and 0.9.43. What is replacement in Runtime?

We useded25519_batch_verify in runtime from sp_io::crypto mod. sp_io::Crypto and Verify traits require self, but I cannot find implementation. In substrate primitives core I see verify calling fn ...
Dzmitry Lahoda's user avatar