Transact Signer

Execute direct HSM/MPC transactions.

Endpoint

POST /transactSigner

Description

Executes transactions directly with HSM/MPC signers, bypassing Account Abstraction. This is useful for direct blockchain transactions.

Request Body

{
  "to": "0xB72F28d9c0f72d488813E57581C17C466855E1F7",
  "funcSignature": "transfer(address,uint256)",
  "funcParams": ["0x106eB473f541E9485bB428aeC502c2FEa1467779", "1000000000000000000"],
  "value": "0",
  "settings": {
    "rpc": "https://polygon-amoy.infura.io/v3/{key}",
    "signer": {
      "clientId": "your-fireblocks-client-id",
      "versionId": "1"
    }
  }
}

Response

Same as Execute Operation endpoint.

Use Cases

Direct transactions: Execute transactions without Account Abstraction
Legacy compatibility: Interact with contracts that don't support Account Abstraction
HSM/MPC operations: Use enterprise signing infrastructure for direct transactions
Gas optimization: Bypass Account Abstraction overhead when not needed

Best Practices

Use when appropriate: Only use for direct transactions, prefer Account Abstraction when possible
Handle gas properly: Configure gas overshoot settings appropriately
Validate addresses: Ensure contract addresses are correct
Monitor execution: Track transaction status and handle failures

Execute Operation - Execute Account Abstraction operations
Sign Message - Sign messages with HSM/MPC

⚠️ Note: This endpoint bypasses Account Abstraction. Use Account Abstraction endpoints when possible for better UX and features like gasless transactions.