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feat(dlv): the genuine market bundle producer, and the vector regenerated from it #833

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Merged
cryptskii merged 1 commit into from
Sep 10, 2026
Merged

feat(dlv): the genuine market bundle producer, and the vector regenerated from it #833

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176 changes: 138 additions & 38 deletions dsm_client/deterministic_state_machine/dsm/src/ccb/settlement.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -698,40 +698,152 @@ pub mod fixtures {
}
}

/// Syntactically valid market terms whose route consumes `parent` and
/// whose route-set commitment is `x` — what ties a bound bundle to a
/// trade in every consumer.
/// The trader's fixture identity. A market settle advances the trader's
/// SELF-LOOP, so the counterparty devid IS the trader's own.
pub const FIXTURE_TRADER_GENESIS: [u8; 32] = [0x41; 32];
pub const FIXTURE_TRADER_DEVID: [u8; 32] = [0x42; 32];
pub const FIXTURE_REL_KEY: [u8; 32] = [0x51; 32];
pub const FIXTURE_TRADER_PARENT: [u8; 32] = [0x52; 32];
pub const FIXTURE_ENTROPY: [u8; 32] = [0x55; 32];

/// The trader's deterministic fixture keypair. Signing SPX256f is not free,
/// so it is derived once.
fn fixture_keypair() -> &'static crate::crypto::sphincs::SphincsKeyPair {
static KP: std::sync::OnceLock<crate::crypto::sphincs::SphincsKeyPair> =
std::sync::OnceLock::new();
KP.get_or_init(|| {
crate::crypto::sphincs::generate_keypair_from_seed(
crate::crypto::sphincs::SphincsVariant::SPX256f,
&[0x57; 32],
)
.expect("fixture keypair")
})
}

/// The settle this trade actually is, signed. Every field is coherent with
/// the route leg and the successor the bundle carries: same pair, same
/// amounts, same fee, same parent.
fn fixture_signed_settle(parent: [u8; 32], x: [u8; 32]) -> crate::types::operations::Operation {
use crate::types::operations::{Operation, TransactionMode};
let kp = fixture_keypair();
let unsigned = Operation::DlvSettle {
vault_id: [0x03; 32].to_vec(),
owner_public_key: vec![0x02; 64],
owner_devid: [0x02; 32],
owner_genesis: [0x01; 32],
input_policy_commit: [0x10; 32],
output_policy_commit: [0x20; 32],
parent_sequence: 7,
parent_binding: parent,
route_commit_bytes: vec![0x09; 5],
external_commitment_x: x,
input_amount: 10_000,
output_amount: 4_935,
fee_bps: 30,
sigma: [0x00; 32],
settler_public_key: kp.public_key.clone(),
settler_devid: FIXTURE_TRADER_DEVID,
settlement_receipt_id: [0x11; 32],
signature: Vec::new(),
mode: TransactionMode::Unilateral,
};
// The settler signs the canonical bytes with field 18 cleared, then
// writes the signature back — which is why a settle cannot be signed
// after the advance.
let sig = crate::crypto::sphincs::sphincs_sign(&kp.secret_key, &unsigned.to_bytes())
.expect("fixture settle signature");
match unsigned {
Operation::DlvSettle {
vault_id,
owner_public_key,
owner_devid,
owner_genesis,
input_policy_commit,
output_policy_commit,
parent_sequence,
parent_binding,
route_commit_bytes,
external_commitment_x,
input_amount,
output_amount,
fee_bps,
sigma,
settler_public_key,
settler_devid,
settlement_receipt_id,
mode,
..
} => Operation::DlvSettle {
vault_id,
owner_public_key,
owner_devid,
owner_genesis,
input_policy_commit,
output_policy_commit,
parent_sequence,
parent_binding,
route_commit_bytes,
external_commitment_x,
input_amount,
output_amount,
fee_bps,
sigma,
settler_public_key,
settler_devid,
settlement_receipt_id,
signature: sig,
mode,
},
_ => unreachable!("constructed as DlvSettle"),
}
}

/// Market terms whose route consumes `parent` and whose route-set
/// commitment is `x`.
///
/// NOTHING HERE IS INVENTED ANY MORE (5c-2 Step 2). `operation_bytes` is a
/// real signed `DlvSettleOperationPreimageV1`, `trader_successor` is
/// `relationship_chain_tip_v2` recomputed over exactly those bytes, and
/// `sigma_dsm` is a real SPHINCS+ signature over the substrate digest —
/// all produced by [`crate::dlv::market_producer`], which is the only way
/// to obtain them. The previous fixture asserted a 300-byte filler and a
/// byte-pattern signature, which could not have satisfied 2c-B's `G1`-`G4`.
pub fn market_terms(parent: [u8; 32], x: [u8; 32]) -> MarketTerms {
MarketTerms {
intent: TradeIntent {
let settle = fixture_signed_settle(parent, x);
let prepared = crate::dlv::market_producer::prepare_market_successor(
FIXTURE_REL_KEY,
FIXTURE_TRADER_PARENT,
FIXTURE_TRADER_DEVID,
&settle,
FIXTURE_ENTROPY,
&crate::dlv::market_producer::TraderIdentity {
genesis: FIXTURE_TRADER_GENESIS,
device_id: FIXTURE_TRADER_DEVID,
},
&fixture_keypair().secret_key,
)
.expect("fixture market successor");
crate::dlv::market_producer::market_terms(
TradeIntent {
token_in: [0x10; 32],
amount_in: 10_000,
token_out: [0x20; 32],
exact_out: 4_935,
fee_bps: 30,
nonce: [0x5E; 32],
},
route_set_commitment: x,
selected_route: Route::new(vec![RouteLeg::Single(Allocation {
x,
Route::new(vec![RouteLeg::Single(Allocation {
parent_binding: parent,
delta_in: 10_000,
delta_out: 4_935,
encumbrance_claim: [0x00; 32],
fee_policy: FeePolicy::new(30).unwrap(),
})])
.unwrap(),
trader_parent: [0x52; 32],
trader_successor: [0x59; 32],
recovery_material: DsmSuccessorEvidence::new(
[0x51; 32],
[0x52; 32],
[0x53; 32],
vec![0x1A; 300],
[0x55; 32],
signature_bytes(0x57),
)
.unwrap(),
}
&prepared,
)
.expect("fixture market terms")
}

/// A canonical market bundle consuming `parent` into `successor` under
Expand Down Expand Up @@ -809,6 +921,9 @@ mod tests {
vec![0xA5; SPX256F_SIGNATURE_LEN]
}

/// Synthetic on purpose, and legitimately so: these two call sites encode
/// it to check the `0x0031` ENVELOPE AND FIELD ORDER, not to stand in for a
/// produced bundle. Nothing derived from it is offered as a market bundle.
fn evidence() -> DsmSuccessorEvidence {
DsmSuccessorEvidence::new(
[0x51; 32],
Expand All @@ -821,17 +936,6 @@ mod tests {
.unwrap()
}

fn intent() -> TradeIntent {
TradeIntent {
token_in: [0x10; 32],
amount_in: 10_000,
token_out: [0x20; 32],
exact_out: 4_935,
fee_bps: 30,
nonce: [0x5E; 32],
}
}

fn allocation(parent: [u8; 32]) -> Allocation {
Allocation {
parent_binding: parent,
Expand All @@ -842,15 +946,11 @@ mod tests {
}
}

/// Producer-derived, like every other market bundle in the tree since
/// 5c-2 Step 2. The tests below that need a MISMATCH build it by mutating
/// this, never by inventing a second set of operands.
fn terms(parent: [u8; 32]) -> MarketTerms {
MarketTerms {
intent: intent(),
route_set_commitment: [0x58; 32],
selected_route: Route::new(vec![RouteLeg::Single(allocation(parent))]).unwrap(),
trader_parent: [0x52; 32],
trader_successor: [0x59; 32],
recovery_material: evidence(),
}
fixtures::market_terms(parent, [0x58; 32])
}

// ── the worked owner-close layout, byte for byte where 2c-A pins it ──
Expand Down
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