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index_name
type:enum
required

Index identifier, matches (base) cryptocurrency with quote currency

Allowed values: btc_usd, eth_usd, ada_usdc, algo_usdc, avax_usdc, ... (total 47 values)

Available options: btc_usd, eth_usd, ada_usdc, algo_usdc, avax_usdc, bch_usdc, bnb_usdc, btc_usdc, btcdvol_usdc, buidl_usdc, doge_usdc, dot_usdc, eurr_usdc, eth_usdc, ethdvol_usdc, link_usdc, ltc_usdc, near_usdc, paxg_usdc, shib_usdc, sol_usdc, steth_usdc, ton_usdc, trump_usdc, trx_usdc, uni_usdc, usde_usdc, usyc_usdc, xrp_usdc, btc_usdt, eth_usdt, eurr_usdt, sol_usdt, steth_usdt, usdc_usdt, usde_usdt, btc_eurr, btc_usde, btc_usyc, eth_btc, eth_eurr, eth_usde, eth_usyc, steth_eth, paxg_btc, drbfix-btc_usdc, drbfix-eth_usdc
Subscription Request
type:object

Client sends subscription request to subscribe to notification channel. Please refer to Notification page for more information.

Subscription Notification Data
type:object

Server sends subscription notification data

data
type:object
required
seconds
type:integer
required

Number of seconds remaining until the expiration of the nearest expiring instrument

price
type:number
required

The current index price or the estimated expiration price for the index. When is_estimated is true, this represents the calculated estimated ending price; otherwise, it is the current index price.

is_estimated
type:boolean
required

Indicates whether the price is an estimated value. When true, the price represents a calculated estimated ending price for expiration. When false, the price is the current index price.

left_ticks
type:number

Number of time ticks remaining until expiration. This field is only present when is_estimated is true.

total_ticks
type:number

Total number of time ticks for the expiration period. This field is only present when is_estimated is true.