> ## Documentation Index > Fetch the complete documentation index at: https://docs.blockradar.co/llms.txt > Use this file to discover all available pages before exploring further. # Master Wallet Sign Transaction > Sign a raw unsigned transaction with the master wallet's private key. Supports EVM (JSON string), Tron (JSON string), and Solana (base64 VersionedTransaction). ## OpenAPI ````yaml post /v1/wallets/{id}/signing/transaction openapi: 3.0.3 info: title: Blockradar Documentation description: >- The OpenAPI specification of the Blockradar API that enables fintechs and developers to seamlessly integrate stablecoin deposits and payments into their products. version: 1.0.0 contact: {} servers: - url: https://api.blockradar.co security: - apiKey: [] tags: - name: Rewards description: >- Non-custodial yield (Earn) on stablecoins via regulated (Fija) and DeFi (Aave) strategies. Deposit, withdraw, preview fees, and read positions and earnings at the business, wallet, and sub-address level. Amounts are returned net of the platform fee, which applies only to interest earned. - name: Wallet description: >- Wallet Management System Comprehensive wallet management API for multi-blockchain operations. This system handles wallet creation, configuration, balance monitoring, and integration with various blockchain networks. Core Functionality: - Multi-blockchain wallet creation and management - Balance monitoring and asset tracking - Auto-settlement rule configuration - Gateway wallet integration - Address generation and management - Transaction monitoring and processing - name: Addresses description: >- Address Management System Comprehensive blockchain address management API for operations. This system handles address creation, validation, monitoring, and management across multiple blockchain networks. Core Functionality: - Multi-blockchain address generation - Address validation and verification - Balance monitoring and tracking - Transaction history management - Address labeling and organization - Integration with wallet systems - Real-time address monitoring - name: Asset - name: Transactions - name: Withdraw description: >- The Withdraw feature allows you to programmatically withdraw stablecoins from your master wallet with ease - name: Withdraw Fiat - name: Signing description: >- Typed data signing service for secure transaction authorization. Supports all EIP-712 standards including EIP-3009 (TransferWithAuthorization) and EIP-2612 (Permit). - name: Swap description: >- The Swap feature enables users to exchange one stabelcoin asset for another across different blockchains. This feature provides a seamless way to convert between different stablecoins while maintaining security and compliance standards. - name: Liquidity Pool - name: Virtual Accounts description: >- Virtual Accounts API provides endpoints for managing virtual bank accounts linked to master wallets or child addresses. This API enables businesses to: - Create virtual accounts for customers to receive payments - Retrieve virtual account details - Activate/deactivate virtual accounts **Virtual Account Types:** Virtual accounts support different types with varying behaviors: 1. **AUTO_FUNDING** (Default): - Automatically mints stablecoin when fiat payments are received - Transfers the stablecoin to the linked wallet/address immediately - Best for real-time payment processing **How It Works - Auto-Funding Flow (AUTO_FUNDING type only):** When a customer sends fiat currency to a virtual account with type AUTO_FUNDING: 1. **Payment Receipt**: The payment is received in the virtual account 2. **Automatic Minting**: The system automatically mints the stablecoin equivalent 3. **Blockchain Transfer**: The minted stablecoin is transferred to the virtual account's linked wallet or address **Note**: The auto-funding flow only applies to virtual accounts with type `AUTO_FUNDING`. Other types have different processing behaviors. ## Prerequisites Before creating virtual accounts, ensure: - **Compliance requirements must be completed** (see [Compliance Requirements](http://localhost:3000/essentials/virtual-accounts#compliance-requirements) section below) - **Virtual accounts feature must be enabled** for your business (reach out to [support@blockradar.co](https://mailto:support@blockradar.co) or use live chat on the dashboard to enable the feature after compliance approval) - **Only available on MAINNET environment** (not available on testnet) - **Master Wallet must support stablecoin asset** - Your account plan must include stablecoin access (upgrade from Dashboard → Settings → Subscription if needed) **Supported Currency:** - Fiat: NGN (Nigerian Naira) - Stablecoin: cNGN - minted automatically on blockchain (for AUTO_FUNDING type) - name: Auto Settlements description: >- Creates a new auto settlement rule for a wallet. Auto settlement automatically transfers/swap assets based on configured rules when certain conditions are met. Rules can be configured for: - Source blockchain and assets - Destination blockchain and asset - Amount ranges (min/max) - Slippage tolerance - Gateway vs non-gateway wallets Gateway rules are required for testnet wallets and must have matching source/destination assets. - name: Smart Contract description: >- This API provides endpoints for interacting with smart contracts on the blockchain. It allows for reading contract data, executing contract functions, and estimating network fees. - name: Gateway description: >- The Gateway feature enables you to programmatically deposit USDC into a unified, chain-abstracted balance and instantly mint USDC on any supported blockchain, streamlining crosschain transfers and eliminating manual bridging steps and rebalancing complexities. - name: Payment Links description: >- The Payment Pages API provides a quick and secure way to collect payment for servcies. - name: Beneficiaries description: >- This API allows you to create beneficiaries with automatic settlements to your external wallets on a periodic basis. Example frequencies: INSTANT, DAILY, WEEKLY, MONTHLY, YEARLY - name: AML description: >- The AML (Anti Money Laundering) API provides a quick way for you to check if an address is blacklisted or sanctioned - name: Asset Recovery description: >- Enables the recovery (salvage) of both native blockchain assets and tokens from a specified sender address to a recipient address. This feature supports emergency fund recovery and asset consolidation operations. - name: Miscellaneous description: >- The Miscellaneous API are supporting APIs that can be used to provide more details to other APIs. - name: Asset1 - name: Blockchain - name: Webhooks description: >- Webhooks allow you to set up a notification system that can be used to receive updates on certain requests made to the Blockradar API. To see full list and instructions [https://docs.blockradar.co/essentials/webhooks](https://docs.blockradar.co/essentials/webhooks) ## - name: Deposit - name: Withdraw1 - name: Swap1 - name: Gateway1 paths: /v1/wallets/{id}/signing/transaction: post: tags: - Signing summary: Master Wallet Sign Transaction description: >- Sign a raw unsigned transaction with the master wallet's private key. Supports EVM (JSON string), Tron (JSON string), and Solana (base64 VersionedTransaction). operationId: masterWalletSignTransaction parameters: - name: id in: path required: true schema: type: string example: YOUR_WALLET_ID requestBody: content: application/json: schema: type: object required: - transaction properties: transaction: type: string description: >- The serialized unsigned transaction. Base64 for Solana, JSON string for EVM and Tron. example: >- {"to":"0x000000000000000000000000000000000000dEaD","value":"0x5af3107a4000","nonce":4,"chainId":11155111,"gasLimit":"0x5208","maxFeePerGas":"0x59682f00","maxPriorityFeePerGas":"0x3b9aca00","type":2} reference: type: string description: Your internal tracking ID. example: eth-transfer-001 metadata: type: object description: Custom key-value pairs stored with the transaction record. example: source: jupiter pair: SOL/USDC examples: EVM Transaction: value: transaction: >- {"to":"0x000000000000000000000000000000000000dEaD","value":"0x5af3107a4000","nonce":4,"chainId":11155111,"gasLimit":"0x5208","maxFeePerGas":"0x59682f00","maxPriorityFeePerGas":"0x3b9aca00","type":2} reference: eth-transfer-001 Solana Transaction: value: transaction: >- AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... reference: jupiter-swap-001 Tron Transaction: value: transaction: >- {"visible":false,"txID":"abc123...","raw_data":{"contract":[...],"ref_block_bytes":"1234","ref_block_hash":"abcdef","expiration":1710800000000,"timestamp":1710799990000},"raw_data_hex":"0a02..."} reference: trx-transfer-001 responses: '200': description: Transaction signed successfully content: application/json: schema: type: object properties: statusCode: type: number example: 200 message: type: string example: Transaction signed successfully data: type: object properties: id: type: string example: 782942da-48b0-416b-924b-8f657ae637a7 reference: type: string example: eth-transfer-001 senderAddress: type: string example: '0xC887a3Cb8E7AbA4A77D7275AD4B242f71cbd5446' recipientAddress: type: string example: '0xC887a3Cb8E7AbA4A77D7275AD4B242f71cbd5446' hash: type: string example: >- 0xac4c73ca084608ac6b981e54db948dc80c15b4ea3ffd0c9f5781f3af7ad6fe51 confirmed: type: boolean example: true status: type: string example: SUCCESS type: type: string example: SIGNED createdChannel: type: string example: api reason: type: string example: Transaction signed network: type: string example: testnet chainId: type: number example: 11155111 metadata: nullable: true example: null signedTransaction: type: string description: >- The signed transaction. Base64 string for Solana, hex string for EVM, JSON string for Tron. example: >- 0x02f87383aa36a763843b9aca008459682f0082520894000000000000000000000000000000000000dead865af3107a400080c080a0b760... amount: nullable: true example: null amountUSD: type: string example: '0.00' fee: nullable: true example: null feeUSD: nullable: true example: null currency: type: string example: USD createdAt: type: string example: '2026-03-19T13:34:24.937Z' updatedAt: type: string example: '2026-03-19T13:34:24.937Z' wallet: type: object properties: id: type: string example: 3f9aca5c-38ee-4e1d-ab67-c084a2e37bb2 name: type: string example: Ethereum Wallet address: type: string example: '0xC887a3Cb8E7AbA4A77D7275AD4B242f71cbd5446' isActive: type: boolean example: true status: type: string example: ACTIVE network: type: string example: testnet asset: nullable: true example: null blockchain: type: object properties: id: type: string example: 85ffc132-3972-4c9e-99a5-5cf0ccb688bf name: type: string example: ethereum symbol: type: string example: eth slug: type: string example: ethereum isEvmCompatible: type: boolean example: true tokenStandard: type: string example: ERC20 beneficiary: nullable: true example: null examples: EVM: value: statusCode: 200 message: Transaction signed successfully data: id: 782942da-48b0-416b-924b-8f657ae637a7 reference: 52TQawmiqYpNiWD2Ks0P senderAddress: '0xC887a3Cb8E7AbA4A77D7275AD4B242f71cbd5446' recipientAddress: '0xC887a3Cb8E7AbA4A77D7275AD4B242f71cbd5446' tokenAddress: null amount: null amountPaid: null amountUSD: '0.00' rateUSD: '0.00' fee: null feeUSD: null feeHash: null currency: USD toCurrency: null blockNumber: null blockHash: null hash: >- 0xac4c73ca084608ac6b981e54db948dc80c15b4ea3ffd0c9f5781f3af7ad6fe51 confirmations: null confirmed: true gasPrice: null gasUsed: null gasFee: null status: SUCCESS processingStatus: PENDING processingProviderReference: null processingReason: null type: SIGNED createdChannel: api note: null amlScreening: {} isAutoSweep: false assetSwept: null assetSweptAt: null assetSweptGasFee: null assetSweptHash: null assetSweptSenderAddress: null assetSweptRecipientAddress: null assetSweptAmount: null reason: Transaction signed network: testnet chainId: 11155111 metadata: null toAmount: null signedTransaction: >- 0x02f87383aa36a763843b9aca008459682f0082520894000000000000000000000000000000000000dead865af3107a400080c080a0b7600de5fce50c7dddea4673296e48d440aa4d62148d9645c881494ff55c76e6a044576669a19e0e6cddc14115144ce3e5b6d80c71201ef0e46b28a22aca8d7d2a rate: null createdAt: '2026-03-19T13:34:24.937Z' updatedAt: '2026-03-19T13:34:24.937Z' wallet: id: 3f9aca5c-38ee-4e1d-ab67-c084a2e37bb2 name: Ethereum Wallet description: Yooooo address: '0xC887a3Cb8E7AbA4A77D7275AD4B242f71cbd5446' derivationPath: m/44'/60'/0'/0/0 isActive: true status: ACTIVE network: testnet configurations: {} createdAt: '2024-05-15T12:09:24.777Z' updatedAt: '2026-03-18T15:30:13.505Z' asset: null blockchain: id: 85ffc132-3972-4c9e-99a5-5cf0ccb688bf name: ethereum symbol: eth slug: ethereum derivationPath: m/44'/60'/0'/0 isEvmCompatible: true isL2: false isActive: true tokenStandard: ERC20 networkFeeModel: native configurations: null createdAt: '2024-05-14T17:53:33.095Z' updatedAt: '2024-11-26T20:04:13.936Z' beneficiary: null Solana: value: statusCode: 200 message: Transaction signed successfully data: id: 02f404a5-d13e-4bcf-8ad5-c5f51c04fa49 reference: qZmQqDiIp9owMzQJcDbv senderAddress: HKqZUT3wuyJrsPYmrYPcGduDdjXZTggbLrNsF9WHMvbw recipientAddress: HKqZUT3wuyJrsPYmrYPcGduDdjXZTggbLrNsF9WHMvbw tokenAddress: null amount: null amountPaid: null amountUSD: '0.00' rateUSD: '0.00' fee: null feeUSD: null feeHash: null currency: USD toCurrency: null blockNumber: null blockHash: null hash: >- TjphHHAzjhRBn8t1qhhTRWpUxvkATBnzeRBB8fonWkYpR1gDh4t99rmgah3hrwoCbD3L9Ex1a7SYjjX2TePio3s confirmations: null confirmed: true gasPrice: null gasUsed: null gasFee: null status: SUCCESS processingStatus: PENDING processingProviderReference: null processingReason: null type: SIGNED createdChannel: api note: null amlScreening: {} isAutoSweep: false assetSwept: null assetSweptAt: null assetSweptGasFee: null assetSweptHash: null assetSweptSenderAddress: null assetSweptRecipientAddress: null assetSweptAmount: null reason: Transaction signed network: testnet chainId: 103 metadata: null toAmount: null signedTransaction: >- ARcO4DT2IYg/wemCZy4iYXVRzlGruYHUTGqIcbWI/uWeWet6MNZKVVvUF4yT5GQjRqrb1QD1TaAoflyXXatxzAaAAQABA/KOWisiJzXz+XfkR7hmKrGs4oq5OUy5wxuBKySr+MSeAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH2glfU7S1Cog0JFqZHmrMC3mPnqjPwkG8n0W+6vdA7AQICAAEMAgAAAGQAAAAAAAAAAA== rate: null createdAt: '2026-03-19T13:38:45.326Z' updatedAt: '2026-03-19T13:38:45.326Z' wallet: id: c72a6f21-6ab5-48ad-9f99-fd90a2d6d311 name: Solana Testnet Wallet description: This is solana testnet wallet address: HKqZUT3wuyJrsPYmrYPcGduDdjXZTggbLrNsF9WHMvbw derivationPath: m/44'/501'/0'/1' isActive: true status: ACTIVE network: testnet configurations: null createdAt: '2024-11-08T17:09:19.372Z' updatedAt: '2024-11-08T17:09:19.372Z' asset: null blockchain: id: 196badf5-380f-4480-ab4a-d0e4304e91f0 name: solana symbol: sol slug: solana derivationPath: m/44'/501'/0' isEvmCompatible: false isL2: false isActive: true tokenStandard: null networkFeeModel: native configurations: null createdAt: '2024-10-22T16:57:33.465Z' updatedAt: '2024-11-26T20:04:13.951Z' beneficiary: null Tron: value: statusCode: 200 message: Transaction signed successfully data: id: af44218f-d38b-472b-9834-49f461a20fd4 reference: J6RugzxXI6cdpeMXrhh senderAddress: TMUZSkS3aF1pZxnTokWikUQH7SYt3bNb6G recipientAddress: TMUZSkS3aF1pZxnTokWikUQH7SYt3bNb6G tokenAddress: null amount: null amountPaid: null amountUSD: '0.00' rateUSD: '0.00' fee: null feeUSD: null feeHash: null currency: USD toCurrency: null blockNumber: null blockHash: null hash: >- 3180f971f692a78f62050278149d746abd946fbd1797a414f5ad0d5ed45c902b confirmations: null confirmed: true gasPrice: null gasUsed: null gasFee: null status: SUCCESS processingStatus: PENDING processingProviderReference: null processingReason: null type: SIGNED createdChannel: api note: null amlScreening: {} isAutoSweep: false assetSwept: null assetSweptAt: null assetSweptGasFee: null assetSweptHash: null assetSweptSenderAddress: null assetSweptRecipientAddress: null assetSweptAmount: null reason: Transaction signed network: testnet chainId: 3448148188 metadata: null toAmount: null signedTransaction: >- {"visible":false,"txID":"3180f971f692a78f62050278149d746abd946fbd1797a414f5ad0d5ed45c902b","raw_data_hex":"0a02513f220808c7d5da0ddd12fb40e8a9cbb2d0335a67080112630a2d747970652e676f6f676c65617069732e636f6d2f70726f746f636f6c2e5472616e73666572436f6e747261637412320a15417e3682ec8f5b98a77467149815b72245f78586fc1215418840e6c55b9ada326d211d818c34a994aeced80818c0843d7088d5c7b2d033","raw_data":{"contract":[{"parameter":{"value":{"to_address":"418840e6c55b9ada326d211d818c34a994aeced808","owner_address":"417e3682ec8f5b98a77467149815b72245f78586fc","amount":1000000},"type_url":"type.googleapis.com/protocol.TransferContract"},"type":"TransferContract"}],"ref_block_bytes":"513f","ref_block_hash":"08c7d5da0ddd12fb","expiration":1773927585000,"timestamp":1773927525000},"signature":["d5adac23f23414083ef4f93b995a4a18f11a480c4e0e0cb72050dbb5615487bf1695161eb202771af6793095d8a1a9600c770cc58e1f7b2d975e223b3e1094351B"]} rate: null createdAt: '2026-03-19T13:38:47.096Z' updatedAt: '2026-03-19T13:38:47.096Z' wallet: id: c4bbebea-6cec-4021-b842-ffead75fd0f1 name: Tron Wallet description: This is tron testnet wallet address: TMUZSkS3aF1pZxnTokWikUQH7SYt3bNb6G derivationPath: m/44'/195'/0'/0/2 isActive: true status: ACTIVE network: testnet configurations: null createdAt: '2024-05-15T12:12:06.305Z' updatedAt: '2024-05-15T12:12:06.305Z' asset: null blockchain: id: fa91a922-3838-45f6-8a88-a4c771e1443a name: tron symbol: trx slug: tron derivationPath: m/44'/195'/0'/0 isEvmCompatible: false isL2: false isActive: true tokenStandard: TRC20 networkFeeModel: native configurations: null createdAt: '2024-05-14T17:53:33.110Z' updatedAt: '2024-11-26T20:04:13.943Z' beneficiary: null '400': description: Invalid transaction format content: application/json: schema: type: object properties: statusCode: type: number example: 400 message: type: string example: 'Invalid transaction format: expected a JSON string' components: securitySchemes: apiKey: type: apiKey name: x-api-key in: header ````