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express

This module exports constants and helpers for Express Trading, subaccounts, and relay flows.

Exports​

This module provides constants and helper functions for Express Trading integrations.

Constants​

  • DEFAULT_SUBACCOUNT_EXPIRY_DURATION -- default One-Click Trading session length (7 days)
  • DEFAULT_SUBACCOUNT_MAX_ALLOWED_COUNT -- maximum allowed subaccount count (90)
  • DEFAULT_PERMIT_DEADLINE_DURATION -- default ERC-20 permit deadline (1 hour)
  • DEFAULT_EXPRESS_ORDER_DEADLINE_DURATION -- default express order deadline (1 hour)
  • EXPRESS_EXTRA_EXECUTION_FEE_BUFFER_BPS -- extra execution fee buffer in basis points (1000 bps)
import { EXPRESS_EXTRA_EXECUTION_FEE_BUFFER_BPS } from "@gmx-io/sdk/configs/express";

Helper functions​

getGasPaymentTokens​

getGasPaymentTokens(chainId: number): string[]

Returns the list of token addresses accepted for gas payment on the given chain. For example, on Arbitrum this returns the addresses of USDC, WETH, and USDT.

getDefaultGasPaymentToken​

getDefaultGasPaymentToken(chainId: number): string

Returns the default gas payment token address for the given chain. For active chains, this is the first token in the gas payment list: USDC on Arbitrum and Avalanche, and USDM on MegaETH.

getRelayerFeeToken​

getRelayerFeeToken(chainId: number): Token

Returns the wrapped native token for the given chain. The relayer fee is denominated in this token.

import { getGasPaymentTokens, getDefaultGasPaymentToken } from "@gmx-io/sdk/configs/express";

const gasTokens = getGasPaymentTokens(42161); // Arbitrum gas payment token addresses
const defaultToken = getDefaultGasPaymentToken(42161); // USDC address on Arbitrum

Use this module only if your integration exposes express or subaccount flows directly.