This is a main blocker for AVM supporting schnorr signatures since it implements Poseidon but not Blake. The work on the bb side might be entirely in the native code but there may also be some work to get Poseidon to play nicely in circuit land. Main trickiness is I think inputs are technically in the Grumpkin scalar field. (This is similar though to how we treat BN scalars as Grumpkin scalars in DSL EC ops).
This is a main blocker for AVM supporting schnorr signatures since it implements Poseidon but not Blake. The work on the bb side might be entirely in the native code but there may also be some work to get Poseidon to play nicely in circuit land. Main trickiness is I think inputs are technically in the Grumpkin scalar field. (This is similar though to how we treat BN scalars as Grumpkin scalars in DSL EC ops).