Cryptographic Primitives for Smart Contracts

[Bargsteen]

In order to make it more cost effective to do some basic cryptographic operations that are needed for certain applications we need to add them as primitives to contracts.

This is a minimal version to be included in Sirius for immediate needs of upcoming use-cases.

These primitives are

• ed25519 signature checking
• ecdsa over secp256k1 signature checking (bitcoin/ethereum scheme)
• sha2-256 hashing
• sha3-256 hashing
• keccak-256 hashing (this is almost sha3, but with a padding difference, it is what Ethereum uses in their smart contracts, hence the motivation).

[abizjak]

This issue is also a part of the epic https://github.com/Concordium/concordium-rust-smart-contracts/issues/117

[dg-concordium]

@Bargsteen and @abizjak will this be a separate pull request from the smart contracts v1 documentation or included in that PR?

[abizjak]

It is orthogonal to the changes that are already there so it would be natural for it to be a separate PR.