Squid Dev Documentation
  • Getting Started
    • Overview
    • Get an Integrator ID
    • Integrator Quickstart
  • Widget Integration
    • Add A Widget
      • Swap widget
        • Getting Started
        • Installing the Widget
        • React Installation
        • NextJS Installation
        • Vite Installation
        • Iframe Installation
        • Customization Guide
          • Default User Settings
          • Configuring Content
          • Default Chains and Tokens
          • Configuration Types
          • Collect Fees
        • Information for Integrators
        • Set default chains and tokens via URL
        • Errors
    • Upgrade Your Widget
  • API & SDK Integration
    • API
      • Swap & Bridge Example
      • Staking Example
      • Cross-chain NFT Purchase Example
      • Get Route Status
    • SDK
      • Cross-chain Swap Example
      • Staking Example
      • Cross-chain NFT Purchase Example
      • Get Route Status
    • Key Concepts
      • Route Request Parameters
      • Get a route
      • Execute the route
      • 🪝Hooks
        • How do hooks work
        • Build a preHook
        • Build a postHook
        • Using the full ERC20 or Native balance in a call
        • ❗Transfer the remainder to the user
        • Get a route and execute as normal
      • Express
      • Track status
      • Types
      • Collect Fees
      • Get supported tokens and chains
    • Coral: Intent Swaps
      • Integrating Coral
    • NEW: Bitcoin and Solana
  • Adding Tokens
    • Whitelist a Token
    • Interchain Token(ITS) Listings
      • How To List
    • Circle's EURC Integration Guide
  • Migration
    • Squid v2 vs Squid v1
    • v1 -> v2 Migration
  • Additional Resources
    • Contracts
    • Squid v1 Docs
      • SDK
        • Installing our SDK
        • Get supported tokens and chains
          • Example chains response
          • Example tokens response
        • Set your transfer parameters
        • Get a route
          • Understanding the route response
        • Execute your swap or call
        • Get Route Status
        • Contract calls
          • Code example
          • Creating a ContractCall object
          • Contract call types
          • Approving ERC20s in our multicall
          • Transferring the remainder to a user
        • Collect Fees
          • Fee collector contract addresses
        • Working example!
      • API
        • integratorId
        • API playground
        • Base URLs
        • Get supported tokens and chains
        • Get a route
        • Checking the status of a transaction
        • Error codes
          • V2 API
      • Cosmos
        • Installing our SDK
        • Get supported tokens and chains
          • Example chains response
          • Example tokens response
        • Set your transfer parameters
        • Get a route
          • Cosmos route response
        • Execute your swap or call on Cosmos
        • Get Route Status
        • Cosmos custom calls
        • Working cosmos example!
        • Fallback Addresses
    • Additional Dev Resources
      • Choose How To Integrate Squid
      • Squid x Tenderly
      • Testnet or Mainnet?
      • Understanding Gas Payments
      • Supported Chains and Tokens
      • Request a new supported token
      • Liquidity Sources
        • axlASSET Liquidity
      • Integrator type specific docs
        • DEXs
        • Aggregators
        • NFTs
      • Setting up an EVM signer
      • Setting up Cosmos signer
      • Contract addresses
      • SDK easter eggs
        • Setting toAmount
        • getAllBalances
        • Advanced set up
        • Manually approve a route
        • Manually approve an ERC20
      • Whitelist a token
      • Security & Audits
        • Security
        • Audits
        • Axelar
      • Get an integrator-id
    • Architecture
      • FAQ
      • Liquidity model
      • Architecture
      • General message passing (GMP)
      • Transaction times and fees
      • Fallback behaviour on failed transactions
      • Axelar
    • Brand Assets
      • "Powered by Squid" Policy
    • Audits & Security
    • Contact
  • Changelog
    • SDK
      • v1.3
      • v1.2
    • API
      • v1.9
      • v1.8
      • v1.7
      • v1.6
  • Old v2 Documentation (Deprecated)
    • Whitelist a Token
    • Interchain Token(ITS) Listings
      • How To List
    • Add A Widget
      • Swap widget
        • Getting Started
        • Installing the Widget
        • React Installation
        • NextJS Installation
        • Iframe Installation
        • Customization Guide
          • Default User Settings
          • Theme Customization
          • Configuring Content
          • Default Chains and Tokens
          • Configuration Types
          • Collect fees
        • Information for Integrators
        • Set default chains and tokens via URL
        • Errors
      • Stake widget
        • Installing the Widget
        • Configuration
        • Importing The widget
    • Quick Start
    • API
      • Swap & Bridge Example
      • Staking Example
      • Cross-chain NFT Purchase Example
    • SDK
      • Cross-chain Swap Example
      • Staking Example
      • Cross-chain NFT Purchase Example
    • Key Concepts
      • Route Request Parameters
      • Get a route
      • Execute the route
      • 🪝Hooks
        • How do hooks work
        • Build a preHook
        • Build a postHook
        • Using the full ERC20 or Native balance in a call
        • ❗Transfer the remainder to the user
        • Add your hooks to a route request, or widget
        • Get a route and execute as normal
      • Boost
      • Track status
      • Types
      • Collect Fees
      • Get supported tokens and chains
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On this page
  1. Old v2 Documentation (Deprecated)
  2. Key Concepts
  3. Hooks

Transfer the remainder to the user

Always remember to transfer all tokens left over from the swap or from your calls to the user's address, or your own contract address, at the end of the postHooks.

If you don't do this, there will likely be some funds left on the Squid Multicall Contract after your transaction has completed.

The best way to do this is to add a call sending the full ERC20 or NATIVE balance of the multicall to the address desired. Using the full ERC20 or Native balance in a call

PreviousUsing the full ERC20 or Native balance in a callNextAdd your hooks to a route request, or widget

Last updated 1 year ago

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