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The Multi-Chain Wallet - also called the Managed Wallet - is a Strails-controlled wallet secured by a Hardware Security Module (HSM). It supports both ECDSA and EdDSA cryptographic signature schemes and follows SLIP-0044 HD wallet derivation for deterministic key management across networks. Strails uses this wallet as the execution layer for all API-initiated operations - token transfers, swaps, bridging, and gas payments - so you never need to manage private keys or maintain native token balances on behalf of your users.

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Overview

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How It Works

When you call an API endpoint, Strails routes the operation through the Multi-Chain Wallet:
  1. You call an API endpoint - for example, /withdrawasset or /swap.
  2. Strails validates the request, checks balances, and applies your fee configuration.
  3. The Managed Wallet signs the transaction using the HSM - no private key is ever exposed.
  4. The signed transaction is broadcast to the appropriate blockchain network.
  5. A webhook delivers the result to your configured endpoint once the transaction is confirmed.

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Supported Networks

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What You Can Do

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Token Transfers

The Multi-Chain Wallet executes token transfers on your behalf when you call:

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Swaps

The Managed Wallet coordinates the on-chain swap execution when you call:
  • POST /swap - swap tokens within a user’s Smart Wallet.
  • POST /swaptrigger - trigger an asynchronous swap between cNGN and USDC/USDT.

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Cross-Chain Bridging

For multi-chain operations, pass the target network parameter on POST /withdrawasset. The Managed Wallet coordinates:
  • Locking or burning tokens on the source chain.
  • Minting or releasing tokens on the destination chain.
  • Delivering status updates to your webhook as the bridging progresses.

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Security Model

Strails uses AWS KMS as its HSM layer. The signing workflow keeps key material entirely within the hardware boundary:
  • Keys never leave the HSM - private keys are generated inside the HSM and cannot be exported.
  • Full audit logging - every signing request is logged with a tamper-evident audit trail.
  • No direct key access - neither external parties nor Strails staff can retrieve the raw private key.
  • Automatic key rotation - key rotation policies are enforced at the infrastructure level without service interruption.

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Gas Fees

Strails pays all gas fees for Multi-Chain Wallet operations. You do not need to hold ETH, BNB, SOL, or any other native token to execute transfers, swaps, or bridging through the API.
Gas is covered for:
  • User token withdrawals via /withdrawasset
  • Swap execution via /swap and /swaptrigger
  • Bridging on both source and destination chains

Smart Wallet

Owner-controlled smart contract wallets for user-facing custody

MPC Wallet

Threshold-signing custody for the USDC/USDT FX settlement leg

Wallet Management API

API endpoints for wallet creation and management

Transactions API

Execute transfers, swaps, and bridging operations