wallet_getCapabilities

Get the wallet’s supported capabilities for the given account

Defined in EIP-5792

Returns the wallet’s capabilities for a given account. Capabilities indicate what additional functionality the wallet supports beyond standard RPC methods, such as atomic batch transactions, gasless transactions, auxiliary funds, and authentication features.

Parameters

account · string · required

The account address to check capabilities for. Pattern: ^0x[0-9a-fA-F]{40}$

Returns

result · object

An object where each key is a chain ID (as a hexadecimal string) and each value is an object containing the capabilities supported on that chain.

Show Capabilities by chain

[chainId] · object

Capabilities object for a specific chain (e.g., “0x2105” for Base Mainnet).

Show Available capabilities

auxiliaryFunds · object

Indicates wallet access to funds beyond onchain balance verification. This capability is currently disabled.

Show auxiliaryFunds properties

supported · boolean

Whether auxiliary funds are available for this account on this chain.

atomic · object

Indicates support for atomic batch transaction execution.

Show atomic properties

supported · string

Atomic execution support level: “supported”, “ready”, or “unsupported”.

paymasterService · object

Indicates support for gasless transactions via paymaster services.

Show paymasterService properties

supported · boolean

Whether paymaster services are supported for this account on this chain.

flowControl · object

Indicates support for flow control capabilities.

Show flowControl properties

supported · boolean

Whether flow control is supported for this account on this chain.

datacallback · object

Indicates support for data callback capabilities.

Show datacallback properties

supported · boolean

Whether data callbacks are supported for this account on this chain.

gasLimitOverride · object

Indicates support for app-provided gas limit overrides on individual calls. Defined in ERC-8132. Reported for all chains (0x0).

Show gasLimitOverride properties

supported · boolean

Whether gas limit overrides are supported.

Example Usage

Request

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "wallet_getCapabilities",
  "params": ["0x407d73d8a49eeb85d32cf465507dd71d507100c1"]
}

import { createBaseAccountSDK } from '@base-org/account';

const provider = createBaseAccountSDK().getProvider();

// Get capabilities for a user address
const capabilities = await provider.request({
  method: 'wallet_getCapabilities',
  params: ['0x407d73d8a49eeb85d32cf465507dd71d507100c1']
});

// Check specific capabilities
const baseCapabilities = capabilities["0x2105"]; // Base Mainnet
const hasAuxiliaryFunds = baseCapabilities?.auxiliaryFunds?.supported;
const supportsAtomic = baseCapabilities?.atomic?.supported === "supported";
const hasPaymaster = baseCapabilities?.paymasterService?.supported;
const hasGasLimitOverride = capabilities["0x0"]?.gasLimitOverride?.supported;

console.log('Capabilities:', {
  hasAuxiliaryFunds,
  supportsAtomic,
  hasPaymaster,
  hasGasLimitOverride
});

Full Capabilities Response

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": {
    "0x2105": {
      "auxiliaryFunds": {
        "supported": true
      },
      "atomic": {
        "supported": "supported"
      },
      "paymasterService": {
        "supported": true
      },
      "flowControl": {
        "supported": false
      },
      "datacallback": {
        "supported": false
      }
    },
    "0x0": {
      "gasLimitOverride": {
        "supported": true
      }
    },
    "0x14A34": {
      "auxiliaryFunds": {
        "supported": false
      },
      "atomic": {
        "supported": "ready"
      },
      "paymasterService": {
        "supported": true
      }
    }
  }
}

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": {
    "0x2105": {
      "auxiliaryFunds": {
        "supported": false
      },
      "atomic": {
        "supported": "unsupported"
      },
      "paymasterService": {
        "supported": false
      }
    }
  }
}

Capability Detection Patterns

Check Single Capability

async function checkAuxiliaryFunds(userAddress: string): Promise<boolean> {
  try {
    const capabilities = await provider.request({
      method: 'wallet_getCapabilities',
      params: [userAddress]
    });

    return capabilities["0x2105"]?.auxiliaryFunds?.supported || false;
  } catch (error) {
    console.error('Failed to check capabilities:', error);
    return false;
  }
}

Check Multiple Capabilities

async function getWalletCapabilities(userAddress: string) {
  const capabilities = await provider.request({
    method: 'wallet_getCapabilities',
    params: [userAddress]
  });

  const baseCapabilities = capabilities["0x2105"] || {};

  return {
    hasAuxiliaryFunds: baseCapabilities.auxiliaryFunds?.supported || false,
    hasAtomicBatch: baseCapabilities.atomic?.supported === "supported",
    hasPaymaster: !!baseCapabilities.paymasterService?.supported,
    hasFlowControl: !!baseCapabilities.flowControl?.supported,
    hasDataCallback: !!baseCapabilities.datacallback?.supported,
    hasGasLimitOverride: !!capabilities["0x0"]?.gasLimitOverride?.supported
  };
}

Conditional Transaction Building

async function buildTransaction(userAddress: string, calls: any[]) {
  const capabilities = await provider.request({
    method: 'wallet_getCapabilities',
    params: [userAddress]
  });

  const baseCapabilities = capabilities["0x2105"] || {};
  
  const txParams: any = {
    version: '1.0',
    chainId: '0x2105',
    from: userAddress,
    calls
  };

  // Add gasless capability if supported
  if (baseCapabilities.paymasterService?.supported) {
    txParams.capabilities = {
      paymasterService: {
        url: "https://paymaster.base.org/api/v1/sponsor"
      }
    };
  }

  // Use atomic execution if supported and multiple calls
  if (calls.length > 1 && baseCapabilities.atomic?.supported === "supported") {
    txParams.atomicRequired = true;
  }

  return txParams;
}

Error Handling

Code	Message	Description
-32602	Invalid params	Invalid account address format
4100	Method not supported	Wallet doesn’t support wallet_getCapabilities
4200	Wallet not available	Wallet is not installed or available

Capabilities are chain-specific and account-specific. Always check capabilities for the specific chain and account combination you’re targeting.

Not all wallets support all capabilities. Use capability detection to provide progressive enhancement rather than blocking functionality when capabilities aren’t available.

Integration with Other Methods

With wallet_sendCalls

Use capabilities to enhance transaction execution:

const capabilities = await provider.request({
  method: 'wallet_getCapabilities',
  params: [userAddress]
});

// Use capabilities in wallet_sendCalls
const result = await provider.request({
  method: 'wallet_sendCalls',
  params: [{
    version: '1.0',
    chainId: '0x2105',
    from: userAddress,
    atomicRequired: capabilities["0x2105"]?.atomic?.supported === "supported",
    calls: [{
      to: '0x...',
      value: '0x0',
      data: '0x...'
    }],
    capabilities: {
      paymasterService: capabilities["0x2105"]?.paymasterService?.supported ? {
        url: "https://paymaster.base.org/api/v1/sponsor"
      } : undefined
    }
  }]
});

With wallet_connect

Capabilities detection doesn’t affect wallet_connect, but you can use the results to inform your authentication flow:

const capabilities = await provider.request({
  method: 'wallet_getCapabilities',
  params: [userAddress]
});

// signInWithEthereum is always available with wallet_connect
const { accounts } = await provider.request({
  method: 'wallet_connect',
  params: [{
    version: '1',
    capabilities: {
      signInWithEthereum: { 
        nonce: generateNonce(), 
        chainId: '0x2105'
      }
    }
  }]
});

Best Practices

1. Always Check First: Call wallet_getCapabilities before using advanced features
2. Cache Results: Capabilities typically don’t change frequently, consider caching
3. Graceful Fallbacks: Implement fallback behavior when capabilities aren’t supported
4. Chain-Specific: Check capabilities for each chain your app supports
5. Progressive Enhancement: Use capabilities to enhance UX, not gate basic functionality

Related Documentation

• Capabilities Overview - Complete guide to using capabilities
• wallet_sendCalls - Execute transactions with capabilities
• wallet_connect - Connect with authentication capabilities