Abstract Class: Operation
Defined in: packages/overcast-core/src/operation.ts:132
The signed body of an off-chain operation. Each subclass binds an action discriminant (actionByte) to a payload byte layout (payloadBytes), and digest folds both — with the shared metadata — into the canonical 32-byte message the signer commits to.
The byte layout mirrors Operation/OperationPayload in the on-chain
operation.rs; the primitives come from serialization.ts, so both files
stay byte-for-byte in sync with the Rust ToBytes serialization.
Extended by
Constructors
Constructor
new Operation(domain, params?): Operation;
Defined in: packages/overcast-core/src/operation.ts:143
Parameters
| Parameter | Type |
|---|---|
domain | number |
params? | OperationParams |
Returns
Operation
Properties
actionByte
abstract readonly actionByte: number;
Defined in: packages/overcast-core/src/operation.ts:136
The action's distinct discriminant byte (see ACTIONS).
domain
readonly domain: number;
Defined in: packages/overcast-core/src/operation.ts:140
The domain that this operation is intended for
params
readonly params: OperationParams;
Defined in: packages/overcast-core/src/operation.ts:141
Methods
digest()
digest(): Bytes32;
Defined in: packages/overcast-core/src/operation.ts:161
Build the canonical 32-byte message the signer commits to — the same encoding getId uses for content-addresses, and for the same reason: the preimage is cross-chain, so the digest is identical on every layer and belongs to none of them.
Preimage layout (SHA-256 hashed), mirroring Operation::digest:
"overcast_intent" (15B) | version=1 (1B) | domain (4B LE) | curve (1B) |
action (1B) | expiry LE (8B, i64) | nonce (32B) | payload_bytes (variable)
Returns
payloadBytes()
abstract payloadBytes(): Uint8Array;
Defined in: packages/overcast-core/src/operation.ts:149
Serializes the action payload into its explicit ToBytes byte layout.
Returns
Uint8Array
sign()
sign(signer): Promise<SignedOperation>;
Defined in: packages/overcast-core/src/operation.ts:175
Parameters
| Parameter | Type |
|---|---|
signer | OvercastProtocolSigner |
Returns
Promise<SignedOperation>