Enable sponsored, gasless transactions on the Aptos blockchain using the SmoothSend SDK for seamless user onboarding.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install smoothsend-gasless
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install smoothsend-gasless using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is SmoothSend Gasless Transactions?
SmoothSend provides a robust infrastructure for sponsoring gas fees on the Aptos network, effectively removing the barrier of entry for new users who may not hold APT tokens. By utilizing this Openclaw Skills resource, developers can integrate a dedicated transactionSubmitter into their existing wallet adapter setup, allowing the dApp owner to cover transaction costs via a credit-based system.
This approach significantly improves user retention and conversion rates by providing a Web2-like experience where technical hurdles like gas management are abstracted away. Whether you are building an NFT marketplace, a DeFi protocol, or a gaming platform, integrating SmoothSend through these Openclaw Skills ensures a friction-free environment for your community.
SmoothSend Gasless Transactions Use Cases
- Sponsoring transaction fees for new users to increase dApp adoption.
- Implementing fee-in-token transfers where users pay gas using stablecoins like USDC or USDT.
- Streamlining NFT minting processes by removing the requirement for users to hold native APT.
- Simplifying complex DeFi interactions by bundling gas sponsorship into contract calls.
How SmoothSend Gasless Transactions Works
- The developer initializes the SmoothSendTransactionSubmitter with a valid API key and specifies the target network.
- This submitter is passed into the AptosWalletAdapterProvider configuration as the primary transactionSubmitter.
- When a user initiates a transaction, the wallet signs the payload, but the SmoothSend backend acts as the fee payer.
- The transaction is submitted to the Aptos blockchain, and the gas cost is deducted from the developer's SmoothSend credit balance.
- For stablecoin-specific transfers, the Script Composer client can be used to deduct the fee directly from the transferred asset.
SmoothSend Gasless Transactions Setup
Install the necessary dependencies via npm:
npm install @smoothsend/sdk @aptos-labs/wallet-adapter-react
Configure your environment variables to include your API key:
# For Next.js
NEXT_PUBLIC_SMOOTHSEND_API_KEY=your_api_key_here
# For Vite
VITE_SMOOTHSEND_API_KEY=your_api_key_here
SmoothSend Gasless Transactions Data Schema & Taxonomy
The SmoothSend integration relies on a structured configuration object and specific error codes for flow control:
| Feature | Type | Description |
|---|---|---|
| apiKey | String | Public identifier for your SmoothSend account credits. |
| network | String | Options include 'mainnet' or 'testnet'. |
| Error 402 | Status Code | Indicates insufficient credits; triggers the billing redirection flow. |
| ScriptComposer | Client | Specifically handles fee-in-token logic for supported stablecoins. |
SmoothSend Gasless Transactions Advanced Features
- Multi-network support allowing free testing on Testnet before deploying to Mainnet.
- Script Composer client for automated fee-in-token logic without pre-loading credits.
- Integration with Openclaw Skills MCP tools for real-time credit estimation and code snippet generation.
- Global error handling hooks to manage insufficient credit states and user notifications automatically.
SKILL.md
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