ConstantOracle

ConstantOracle wraps another oracle and caches its responses. Since normally there's nothing preventing an oracle from returning different readings for the same feed id, oftentimes it is needed to wrap it in a ConstantOracle.

Parameters

import { Oracle } from "@blueprintsfi/blueprints.js";

declare class ConstantOracle extends Oracle {
    readonly innerOracle: Oracle;
    constructor(innerOracle: Oracle);
}

ConstantOracle takes a single parameter – an oracle to wrap.

Examples

import { ConstantOracle, RawBytes, UnsupportedOracle } from "@blueprintsfi/blueprints.js";
import assert from "node:assert";

const untrustedOracle = new UnsupportedOracle(
    "0xBFFeA64641Ba47AD959ae1D53C9c2C24BC5cE4d1",
    new RawBytes("24e2f8ffb75ed49e89a9a2208f31d4186bf8e50a60c2868ac9073d0ccb69d2dc"),
);

const constantOracle = new ConstantOracle(untrustedOracle);
assert.strictEqual(
    constantOracle.toString(),
    "ConstantOracle<UnsupportedOracle<0xBFFeA64641Ba47AD959ae1D53C9c2C24BC5cE4d1, 0x24e2f8ffb75ed49e89a9a2208f31d4186bf8e50a60c2868ac9073d0ccb69d2dc>>",
);

See also