> ## 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. # Child Address Message > Child Address Message ## OpenAPI ````yaml post /v1/wallets/{id}/addresses/{addressId}/signing/message 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}/addresses/{addressId}/signing/message: parameters: - name: id in: path required: true schema: type: string example: YOUR_WALLET_ID - name: addressId in: path required: true schema: type: string example: ADDRESS_OR_ID post: tags: - Signing summary: Child Address Message description: Child Address Message operationId: childAddressMessage requestBody: content: application/json: schema: type: object properties: message: type: string example: >- I am verifying ownership of the wallet address 0x... as customer cust_123. This message was signed on 2026-03-03 to confirm my control over this wallet. metadata: type: string example: OPTIONAL_METADATA note: type: string example: OPTIONAL_NOTE examples: Child Address Message: value: message: >- I am verifying ownership of the wallet address 0x... as customer cust_123. This message was signed on 2026-03-03 to confirm my control over this wallet. metadata: OPTIONAL_METADATA note: OPTIONAL_NOTE responses: '200': description: 200 - Solana / 200 - Tron / 200 - EVM content: application/json: schema: type: object properties: data: type: object properties: address: type: object properties: address: type: string example: BXrJcMVn7mTDYZCC7Qmfk8n4zncTuf4gMTX2S5r4Qu5r configurations: type: object properties: aml: type: object properties: message: type: string example: Address is not sanctioned provider: type: string example: ofac, fbi, tether, circle status: type: string example: success autoSettlement: type: object properties: isActive: type: boolean example: false rules: type: array items: {} example: [] disableAutoSweep: type: boolean example: true enableGaslessWithdraw: type: boolean example: true showPrivateKey: type: boolean example: false createdAt: type: string example: '2026-01-26T11:38:49.462Z' derivationPath: type: string example: m/44'/501'/0'/46' id: type: string example: f31b365f-97fe-425b-af8b-17a21b429905 isActive: type: boolean example: true metadata: nullable: true example: null name: nullable: true example: null network: type: string example: testnet type: type: string example: INTERNAL updatedAt: type: string example: '2026-01-26T11:38:49.462Z' amlScreening: type: object properties: {} amount: nullable: true example: null amountPaid: nullable: true example: null amountUSD: type: string example: '0.00' asset: nullable: true example: null assetSwept: nullable: true example: null assetSweptAmount: nullable: true example: null assetSweptAt: nullable: true example: null assetSweptGasFee: nullable: true example: null assetSweptHash: nullable: true example: null assetSweptRecipientAddress: nullable: true example: null assetSweptSenderAddress: nullable: true example: null blockHash: nullable: true example: null blockNumber: nullable: true example: null blockchain: type: object properties: configurations: nullable: true example: null createdAt: type: string example: '2024-10-22T10:57:33.465Z' derivationPath: type: string example: m/44'/501'/0' id: type: string example: 196badf5-380f-4480-ab4a-d0e4304e91f0 isActive: type: boolean example: true isEvmCompatible: type: boolean example: false isL2: type: boolean example: false name: type: string example: solana networkFeeModel: type: string example: native slug: type: string example: solana symbol: type: string example: sol tokenStandard: type: string nullable: true example: null updatedAt: type: string example: '2024-11-26T13:04:13.951Z' chainId: type: number example: 103 confirmations: nullable: true example: null confirmed: type: boolean example: true createdAt: type: string example: '2026-03-02T11:44:39.652Z' createdChannel: type: string example: dashboard currency: type: string example: USD fee: nullable: true example: null feeHash: nullable: true example: null feeUSD: nullable: true example: null gasFee: nullable: true example: null gasPrice: nullable: true example: null gasUsed: nullable: true example: null hash: type: string example: >- 384vXDoS5vypWpGqfNAbCPBF35HJYFwXq61qk5hpJcgFWdjPrszdnyZFFme3swAM1LmgmpLftMaSTCp4RiuznUq6 id: type: string example: ff40660b-f910-4847-8ad5-e799adee1f71 isAutoSweep: type: boolean example: false metadata: nullable: true example: null network: type: string example: testnet note: nullable: true example: null processingProviderReference: nullable: true example: null processingReason: nullable: true example: null processingStatus: type: string example: PENDING rate: nullable: true example: null rateUSD: type: string example: '0.00' reason: type: string example: >- I am verifying ownership of the wallet address 0x... as customer cust_123. This message was signed on 2026-03-03 to confirm my control over this wallet. recipientAddress: type: string example: BXrJcMVn7mTDYZCC7Qmfk8n4zncTuf4gMTX2S5r4Qu5r reference: type: string example: Sl58ZBSgNewDacn9Zf senderAddress: type: string example: BXrJcMVn7mTDYZCC7Qmfk8n4zncTuf4gMTX2S5r4Qu5r signedTransaction: type: object properties: r: type: string example: >- 0xe7e84b6b03bf075fa43a3fc87a5418683944852ad9238f202d86c18493c5211d s: type: string example: >- 0x7d8c7d22edbcb144bcd296cf57c4fb091afeb6215473f01b84026ceef9e9188d signature: type: string example: >- 384vXDoS5vypWpGqfNAbCPBF35HJYFwXq61qk5hpJcgFWdjPrszdnyZFFme3swAM1LmgmpLftMaSTCp4RiuznUq6 v: type: number example: 28 status: type: string example: SUCCESS toAmount: nullable: true example: null toCurrency: nullable: true example: null tokenAddress: nullable: true example: null type: type: string example: SIGNED updatedAt: type: string example: '2026-03-02T11:44:39.652Z' wallet: type: object properties: address: type: string example: HKqZUT3wuyJrsPYmrYPcGduDdjXZTggbLrNsF9WHMvbw configurations: nullable: true example: null createdAt: type: string example: '2024-11-08T10:09:19.372Z' derivationPath: type: string example: m/44'/501'/0'/1' description: type: string example: This is solana testnet wallet id: type: string example: c72a6f21-6ab5-48ad-9f99-fd90a2d6d311 isActive: type: boolean example: true name: type: string example: Solana Testnet Wallet network: type: string example: testnet status: type: string example: ACTIVE updatedAt: type: string example: '2024-11-08T10:09:19.372Z' message: type: string example: Message signed successfully statusCode: type: number example: 200 examples: 200 - EVM: value: data: address: address: '0x88922E6BA19C0676E46522111102D5eC26b33702' configurations: aml: message: Address is not sanctioned provider: ofac, fbi, tether, circle status: success autoSettlement: isActive: false rules: [] disableAutoSweep: false enableGaslessWithdraw: false showPrivateKey: false createdAt: '2026-02-12T12:51:42.689Z' derivationPath: m/44'/60'/0'/0/49 id: 68a0eb35-9d3a-4d9e-8a4c-10b1a57c3b80 isActive: true metadata: null name: null network: testnet type: INTERNAL updatedAt: '2026-02-12T12:51:42.689Z' amlScreening: {} amount: null amountPaid: null amountUSD: '0.00' asset: null assetSwept: null assetSweptAmount: null assetSweptAt: null assetSweptGasFee: null assetSweptHash: null assetSweptRecipientAddress: null assetSweptSenderAddress: null blockHash: null blockNumber: null blockchain: configurations: null createdAt: '2024-05-14T11:53:33.095Z' derivationPath: m/44'/60'/0'/0 id: 85ffc132-3972-4c9e-99a5-5cf0ccb688bf isActive: true isEvmCompatible: true isL2: false name: ethereum networkFeeModel: native slug: ethereum symbol: eth tokenStandard: ERC20 updatedAt: '2024-11-26T13:04:13.936Z' chainId: 11155111 confirmations: null confirmed: true createdAt: '2026-03-02T11:41:46.464Z' createdChannel: dashboard currency: USD fee: null feeHash: null feeUSD: null gasFee: null gasPrice: null gasUsed: null hash: >- 0xe7e84b6b03bf075fa43a3fc87a5418683944852ad9238f202d86c18493c5211d7d8c7d22edbcb144bcd296cf57c4fb091afeb6215473f01b84026ceef9e9188d1c id: 81379b62-aeef-4658-a0c5-bc70150c67d7 isAutoSweep: false metadata: null network: testnet note: null processingProviderReference: null processingReason: null processingStatus: PENDING rate: null rateUSD: '0.00' reason: >- I am verifying ownership of the wallet address 0x... as customer cust_123. This message was signed on 2026-03-03 to confirm my control over this wallet. recipientAddress: '0x88922E6BA19C0676E46522111102D5eC26b33702' reference: i2FBaizevHMqy56jy9Ft senderAddress: '0x88922E6BA19C0676E46522111102D5eC26b33702' signedTransaction: r: >- 0xe7e84b6b03bf075fa43a3fc87a5418683944852ad9238f202d86c18493c5211d s: >- 0x7d8c7d22edbcb144bcd296cf57c4fb091afeb6215473f01b84026ceef9e9188d signature: >- 0xe7e84b6b03bf075fa43a3fc87a5418683944852ad9238f202d86c18493c5211d7d8c7d22edbcb144bcd296cf57c4fb091afeb6215473f01b84026ceef9e9188d1c v: 28 status: SUCCESS toAmount: null toCurrency: null tokenAddress: null type: SIGNED updatedAt: '2026-03-02T11:41:46.464Z' wallet: address: '0xC887a3Cb8E7AbA4A77D7275AD4B242f71cbd5446' configurations: null createdAt: '2024-05-15T06:09:24.777Z' derivationPath: m/44'/60'/0'/0/0 description: Yooooo id: 3f9aca5c-38ee-4e1d-ab67-c084a2e37bb2 isActive: true name: updated wallet yeah network: testnet status: ACTIVE updatedAt: '2025-08-18T22:36:21.156Z' message: Message signed successfully statusCode: 200 200 - Solana: value: data: address: address: BXrJcMVn7mTDYZCC7Qmfk8n4zncTuf4gMTX2S5r4Qu5r configurations: aml: message: Address is not sanctioned provider: ofac, fbi, tether, circle status: success autoSettlement: isActive: false rules: [] disableAutoSweep: true enableGaslessWithdraw: true showPrivateKey: false createdAt: '2026-01-26T11:38:49.462Z' derivationPath: m/44'/501'/0'/46' id: f31b365f-97fe-425b-af8b-17a21b429905 isActive: true metadata: null name: null network: testnet type: INTERNAL updatedAt: '2026-01-26T11:38:49.462Z' amlScreening: {} amount: null amountPaid: null amountUSD: '0.00' asset: null assetSwept: null assetSweptAmount: null assetSweptAt: null assetSweptGasFee: null assetSweptHash: null assetSweptRecipientAddress: null assetSweptSenderAddress: null blockHash: null blockNumber: null blockchain: configurations: null createdAt: '2024-10-22T10:57:33.465Z' derivationPath: m/44'/501'/0' id: 196badf5-380f-4480-ab4a-d0e4304e91f0 isActive: true isEvmCompatible: false isL2: false name: solana networkFeeModel: native slug: solana symbol: sol tokenStandard: null updatedAt: '2024-11-26T13:04:13.951Z' chainId: 103 confirmations: null confirmed: true createdAt: '2026-03-02T11:44:39.652Z' createdChannel: dashboard currency: USD fee: null feeHash: null feeUSD: null gasFee: null gasPrice: null gasUsed: null hash: >- 384vXDoS5vypWpGqfNAbCPBF35HJYFwXq61qk5hpJcgFWdjPrszdnyZFFme3swAM1LmgmpLftMaSTCp4RiuznUq6 id: ff40660b-f910-4847-8ad5-e799adee1f71 isAutoSweep: false metadata: null network: testnet note: null processingProviderReference: null processingReason: null processingStatus: PENDING rate: null rateUSD: '0.00' reason: >- I am verifying ownership of the wallet address 0x... as customer cust_123. This message was signed on 2026-03-03 to confirm my control over this wallet. recipientAddress: BXrJcMVn7mTDYZCC7Qmfk8n4zncTuf4gMTX2S5r4Qu5r reference: Sl58ZBSgNewDacn9Zf senderAddress: BXrJcMVn7mTDYZCC7Qmfk8n4zncTuf4gMTX2S5r4Qu5r signedTransaction: signature: >- 384vXDoS5vypWpGqfNAbCPBF35HJYFwXq61qk5hpJcgFWdjPrszdnyZFFme3swAM1LmgmpLftMaSTCp4RiuznUq6 status: SUCCESS toAmount: null toCurrency: null tokenAddress: null type: SIGNED updatedAt: '2026-03-02T11:44:39.652Z' wallet: address: HKqZUT3wuyJrsPYmrYPcGduDdjXZTggbLrNsF9WHMvbw configurations: null createdAt: '2024-11-08T10:09:19.372Z' derivationPath: m/44'/501'/0'/1' description: This is solana testnet wallet id: c72a6f21-6ab5-48ad-9f99-fd90a2d6d311 isActive: true name: Solana Testnet Wallet network: testnet status: ACTIVE updatedAt: '2024-11-08T10:09:19.372Z' message: Message signed successfully statusCode: 200 200 - Tron: value: data: address: address: TSP4LrWKsCmx2UA5xzgMX54gZB5GTXmRx3 configurations: aml: message: Address is not sanctioned provider: ofac, fbi, tether, circle status: success autoSettlement: isActive: false rules: [] disableAutoSweep: true enableGaslessWithdraw: true showPrivateKey: false createdAt: '2025-11-05T13:10:04.350Z' derivationPath: m/44'/195'/0'/0/9 id: f9820826-6a86-48c9-bc28-f3e91751a8a6 isActive: true metadata: null name: null network: testnet type: INTERNAL updatedAt: '2025-11-05T13:10:04.350Z' amlScreening: {} amount: null amountPaid: null amountUSD: '0.00' asset: null assetSwept: null assetSweptAmount: null assetSweptAt: null assetSweptGasFee: null assetSweptHash: null assetSweptRecipientAddress: null assetSweptSenderAddress: null blockHash: null blockNumber: null blockchain: configurations: null createdAt: '2024-05-14T11:53:33.110Z' derivationPath: m/44'/195'/0'/0 id: fa91a922-3838-45f6-8a88-a4c771e1443a isActive: true isEvmCompatible: false isL2: false name: tron networkFeeModel: native slug: tron symbol: trx tokenStandard: TRC20 updatedAt: '2024-11-26T13:04:13.943Z' chainId: 3448148188 confirmations: null confirmed: true createdAt: '2026-03-02T11:43:23.932Z' createdChannel: dashboard currency: USD fee: null feeHash: null feeUSD: null gasFee: null gasPrice: null gasUsed: null hash: >- 0xeb702db44e02edd3c04d06acafe7451b33ac8468c3ef6537d66e80b11084a0406162e1ac21206877e977b4c67750bd6f7cf3de09b1c0b76d4247d48727a2e5e91b id: c420b48a-b8ce-4d87-bd1a-656b7bbef397 isAutoSweep: false metadata: null network: testnet note: null processingProviderReference: null processingReason: null processingStatus: PENDING rate: null rateUSD: '0.00' reason: >- I am verifying ownership of the wallet address 0x... as customer cust_123. This message was signed on 2026-03-03 to confirm my control over this wallet. recipientAddress: TSP4LrWKsCmx2UA5xzgMX54gZB5GTXmRx3 reference: 7BXOe01hi1gKCI51leOz senderAddress: TSP4LrWKsCmx2UA5xzgMX54gZB5GTXmRx3 signedTransaction: signature: >- 0xeb702db44e02edd3c04d06acafe7451b33ac8468c3ef6537d66e80b11084a0406162e1ac21206877e977b4c67750bd6f7cf3de09b1c0b76d4247d48727a2e5e91b status: SUCCESS toAmount: null toCurrency: null tokenAddress: null type: SIGNED updatedAt: '2026-03-02T11:43:23.932Z' wallet: address: TMUZSkS3aF1pZxnTokWikUQH7SYt3bNb6G configurations: null createdAt: '2024-05-15T06:12:06.305Z' derivationPath: m/44'/195'/0'/0/2 description: This is tron testnet wallet id: c4bbebea-6cec-4021-b842-ffead75fd0f1 isActive: true name: Tron Wallet network: testnet status: ACTIVE updatedAt: '2024-05-15T06:12:06.305Z' message: Message signed successfully statusCode: 200 components: securitySchemes: apiKey: type: apiKey name: x-api-key in: header ````