Terminology

Endpoints

Constraints API: Builder

Constraints

Block constraints - not gateway delegation.

• Endpoint: /constraints/v0/builder/constraints
• Method: POST
• Response: Empty
• Headers:
  • Content-Type: application/json
• Body: List[SignedConstraints]

# A signed "bundle" of constraints.
class SignedConstraints(Container):
    message: ConstraintsMessage
    signature: BLSSignature

# A "bundle" of constraints for a specific slot.
class ConstraintsMessage(Container):
    pubkey: BLSPubkey,
    slot: uint64
    contraints: List[Constraint]
    
class Constraint:
		transaction:
		bytecode_hash:
		metadata:

• Decisions
  • we can remove max constraints per slot
  • Need to add a version to this API
  • Use a bytecode hash so there’s flexibility.
  • Ordering: Doesn’t need to be explicit, can be specified in the bytecode.