Weight class

Represents the computational weight parameters for executing a blockchain call.

Weight is Substrate's mechanism for measuring and limiting the computational resources required to execute extrinsics. It has two components:

  • Reference Time: The actual computational time required
  • Proof Size: The size of the proof data (Proof of Validity) for parachains

When submitting multisig approvals, you must specify the maximum weight the final call execution might consume. This prevents unbounded execution and ensures fair resource allocation on the blockchain.

Example:

// Default weight (1 second execution, 10KB proof)
final weight = Weight(
  refTime: BigInt.from(1000000000), // 1 second in picoseconds
  proofSize: BigInt.from(10000),     // 10KB
);

// For heavy operations, increase the weight
final heavyWeight = Weight(
  refTime: BigInt.from(2000000000), // 2 seconds
  proofSize: BigInt.from(50000),     // 50KB
);

Constructors

Weight({required BigInt refTime, required BigInt proofSize})
Creates a new Weight instance.
const
Weight.fromJson(Map<String, dynamic> json)
Creates a Weight from a JSON representation.
factory

Properties

hashCode → int
The hash code for this object.
no setterinherited
proofSize → BigInt
Proof size: the size of the proof data required.
final
props → List<Object>
The list of properties that will be used to determine whether two instances are equal.
no setter
refTime → BigInt
Reference time: the computational time required for execution.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
stringify → bool?
If set to true, the toString method will be overridden to output this instance's props.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toEncodableObject() → Map<String, BigInt>
Converts to an encodable object for SCALE encoding.
toJson() → Map<String, dynamic>
Converts this Weight to a JSON representation.
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited