https://docs.polkadot.com/reference/apps/hosts/polkadot-desktop/preimage/
Preimage Submission via Polkadot Desktop | Polkadot Developer Docs
Reference for how Polkadot Desktop mediates preimage submission for Products, and the Statement vs Preimage distinction for off-chain content.
developer docspreimagesubmissionviapolkadot
https://git-crysp.uwaterloo.ca/iang/pedersen-libsnark/src/b53ab3ed4a9a3f993422e4229863c3d8a1911b01/ratchetcommit.cpp
iang/pedersen-libsnark: zkSNARKs for knowledge of preimage of a Pedersen commitment using libsnark...
pedersen-libsnark - zkSNARKs for knowledge of preimage of a Pedersen commitment using libsnark
pedersenknowledgepreimagecommitmentusing