Struct DealEnvelope 

pub struct DealEnvelope {
    pub id: Uuid,
    pub buyer: AgentId,
    pub seller: AgentId,
    pub terms: Value,
    pub signed_at: SystemTime,
    pub prev_hash: [u8; 32],
    pub hmac: [u8; 32],
}

One signed contract row. The hmac covers the canonical concatenation id || buyer || seller || terms || signed_at || prev_hash so any tamper of a field invalidates the row.

Fields

id: Uuid

buyer: AgentId

seller: AgentId

terms: Value

signed_at: SystemTime

prev_hash: [u8; 32]

hmac: [u8; 32]

Implementations

impl DealEnvelope

pub fn sign( buyer: impl Into<String>, seller: impl Into<String>, terms: Value, prev_hash: [u8; 32], signed_at: SystemTime, key: &[u8], ) -> Result<Self, EnvelopeError>

Build a fresh envelope chained off prev_hash. The signer computes the HMAC; receivers verify with [verify_hmac].

pub fn verify_hmac(&self, key: &[u8]) -> Result<(), EnvelopeError>

Verify the envelope’s hmac against the supplied key.

pub fn next_prev_hash(&self) -> [u8; 32]

Hash this envelope’s body to produce the prev_hash for the next envelope in the chain. Pure fn — does not touch the HMAC key.

Trait Implementations

impl Clone for DealEnvelope

fn clone(&self) -> DealEnvelope

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DealEnvelope

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DealEnvelope

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for DealEnvelope

fn eq(&self, other: &DealEnvelope) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for DealEnvelope

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DealEnvelope