market:interest_rate

Live interest rate updates per trading pair. All maturities publish to a single channel with a maturity tag for server-side filtering.

Channel: market:interest_rate:{pair} Example: market:interest_rate:ETH_USDC

Payload

Payload shape:

{
  "pair": "ETH_USDC",
  "maturity": "11MAR26",
  "sid": "INTEREST-ETH-11MAR26",
  "value": "0.05",
  "timestamp_ms": 1704067200100
}

Field	Type	Description
`pair`	string	Trading pair (e.g. `ETH_USDC`)
`maturity`	string	Expiry label (e.g. `11MAR26`, `20240315`)
`sid`	string	Source identifier for the rate
`value`	string	Interest rate as decimal string (full precision)
`timestamp_ms`	integer	Server emission timestamp in milliseconds

Tag Filtering

Each publication carries a maturity tag (e.g. 11MAR26) for server-side filtering.

Subscribe — Protobuf SDK

All maturities

Subscribe with since: {} to receive the last known value on subscribe.

import { Centrifuge } from "centrifuge/build/protobuf";

const client = new Centrifuge("wss://staging.kyan.sh/stream/websocket?format=protobuf");
const sub = client.newSubscription("market:interest_rate:ETH_USDC", { since: {} });

sub.on("publication", (ctx) => {
  const data = ctx.data instanceof Uint8Array
    ? JSON.parse(new TextDecoder().decode(ctx.data))
    : ctx.data;

  const { pair, maturity, sid, value, timestamp_ms } = data;
  // value is a string — parse to number or Decimal as needed
});

sub.subscribe();
client.connect();

Filtered: specific maturity

const sub = client.newSubscription("market:interest_rate:ETH_USDC", {
  since: {},
  tagsFilter: { key: "maturity", cmp: "eq", val: "11MAR26" }
});

Recovery

Subscribe with since: {} to receive the last known rate on subscribe. On reconnect, the SDK automatically recovers.

Related channels

Channels providing related data.

Channel	Why
SVI Surface	Vol surface parameters. Interest rate and SVI together define theoretical option prices: rate gives the forward, SVI gives the vol.
Index Price	Spot component of the forward. Forward = spot * e^(r*T).
Options BBO	Options top-of-book. `mark_price` and Greeks incorporate the interest rate.
Options L2	Full options depth. Theoretical values at each level depend on the forward, which incorporates this rate.