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spike(ring-vrf): raw proof contexts for local dev builds #457

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spike(ring-vrf): raw proof contexts for local dev builds #457

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21 changes: 20 additions & 1 deletion rust/crates/truapi-server/src/runtime/signing_host/ring_vrf.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ use crate::host_logic::sso::messages::RingVrfError;
use async_trait::async_trait;
use subxt::dynamic;
use subxt::ext::scale_decode::DecodeAsType;
use truapi::v01::{ProductProofContext, RingLocation, RingLocationJunction};
use truapi::v01::{DerivationIndex, ProductProofContext, RingLocation, RingLocationJunction};
use verifiable::GenerateVerifiable;
use verifiable::ring::RingDomainSize;
use verifiable::ring::bandersnatch::BandersnatchVrfVerifiable;
Expand Down Expand Up @@ -212,7 +212,26 @@ impl RingResolver for ChainRingResolver {
}
}

const RAW_CONTEXT_ENV: &str = "TRUAPI_RAW_PROOF_CONTEXT";
const RAW_CONTEXT_PRODUCT_ID: &str = "raw:";

fn raw_context_override(context: &ProductProofContext) -> Option<[u8; 32]> {
if context.product_id != RAW_CONTEXT_PRODUCT_ID {
return None;
}
if std::env::var(RAW_CONTEXT_ENV).as_deref() != Ok("1") {
return None;
}
match context.suffix {
DerivationIndex::Raw(bytes) => Some(bytes),
DerivationIndex::Index(_) => None,
}
}

pub(in crate::runtime) fn context_bytes(context: &ProductProofContext) -> [u8; 32] {
if let Some(raw) = raw_context_override(context) {
return raw;
}
let suffix = derivation_index_bytes(&context.suffix);
let mut input = Vec::with_capacity(9 + context.product_id.len() + suffix.len());
input.extend_from_slice(b"product/");
Expand Down