> ## Documentation Index > Fetch the complete documentation index at: https://docs.crypto.westminister.tech/llms.txt > Use this file to discover all available pages before exploring further. # Create Sub-Merchant Under A Master Merchant > Creates a **sub-merchant** whose `parent_vendor_id` points to the given master merchant. - Master merchant must be a vendor with `parent_vendor_id = null` - Sub-merchant user role is `subvendor` (not `vendor`) - Sub-merchants also receive default Ethereum, TRON, and Solana wallets (best-effort) - Returns **409** when **email** or **phone_number** conflicts. No sub-merchant row and no wallets are created. ## OpenAPI ````yaml /openapi.yaml post /api/v1/auth/merchants/{merchant_id}/sub-merchants openapi: 3.1.0 info: title: EmaalCoin API description: > EmaalCoin API reference. These APIs power cryptocurrency exchange between USDT and Fiat trading. - **On-Ramp**: Buy USDT with fiat (KES) via mobile money (STK Push for Kenya) - **Off-Ramp**: Sell USDT for KES with mobile money payout (Kenya) - **Ethereum, TRON, and Solana**: Multi-chain wallet support - **Merchant Offers**: Create and manage trading offers - **OTC Flows**: Bank and mobile money deposits/withdrawals for merchants - **Pricing engine**: FX quotes and fee profiles for quote-backed orders and transfers - **P2P/B2B transfers**: Internal and external stablecoin sends (USDT/USDC) with optional pricing snapshots - **Stablecoin swaps**: Treasury-backed two-leg USDT ↔ USDC conversion with BitGo confirmation, inventory reservation, and automatic refunds - **Multisig**: Collaborative and platform-managed multisig flows for high-value B2B version: 1.1.0 servers: - url: https://crypto.westminister.tech description: Production API (requires DNS for this hostname). - url: http://13.42.110.185:8080 description: >- UAT on EC2 (direct). Use this base when building proof PDF URLs if the production hostname does not resolve. security: [] tags: - name: Pricing description: >- Commercial pricing profiles and FX rate quotes (admin). Used with orders and transfers for auditable snapshots. - name: Transfers description: >- P2P and B2B stablecoin transfers (USDT/USDC). Optional fiat-equivalent pricing fields. B2B multisig behavior depends on wallet registration (synchronous completion vs proposal flow). - name: Stablecoin Swaps description: >- Treasury-backed USDT ↔ USDC conversions for BitGo provider-managed wallets on `tron`, `ethereum`, or `solana`. Collection confirms before treasury payout starts. Completion requires both legs and dual-asset balance synchronization. - name: Multisig description: >- Multisig wallet registration and TRON proposal/confirm flows (vendor/admin). - name: Escrow Wallets description: Escrow pool wallet metadata for off-ramp and operations. - name: Users description: >- User-related operations (registration, lookup, updates, counts, status changes) - name: Wallets-Users description: User wallet operations (create, manage, query balances) - name: Offers description: Offer operations (create, read, list, counts) - name: Orders description: Order operations (create, update, list, counts, stats) - name: Payment description: Payment initiation operations - name: Merchants description: > Merchant (vendor) onboarding and hierarchy operations. USE **GET /API/V1/AUTH/MERCHANTS** WITH **PAGE_ID** AND **PAGE_SIZE** TO PAGE MASTER VENDORS. USE **GET /API/V1/AUTH/MERCHANTS/{MERCHANT_ID}** FOR ONE MASTER VENDOR, **MERCHANT_WALLETS**, AND ALL **SUBVENDOR** ROWS WITH **WALLETS** (FULL TREE). - name: OTC Deposits description: > OTC fiat-to-crypto deposits (bank or mobile money). Rows live in **`otc_deposits`**. Merchants create drafts or one-shot deposits. **admin**, **otc_officer**, or **treasury** list all deposits. B2B bank flow uses draft, quote, submit, proof, assign, claim, settlement, and audit. **`credited_to_address`** is the merchant on-chain wallet treasury credits (resolved from the default wallet for **`requested_network`** on the master merchant ledger user or any **sub-vendor** under that merchant). **`GET /api/v1/auth/otc/deposits`** backfills missing **`credited_to_address`**/**`to_wallet_id`** when a wallet can be resolved. One-shot **`POST /api/v1/auth/otc/deposits`** persists the payout address when **`requested_network`** is sent. Bank proof PDFs upload via `POST .../proof` and are viewed at **`GET /otc-deposits-proof/{deposit_id}/{file}.pdf`** (relative **`proof_url`**/**`file_url`** plus API base URL). Merchants may edit tab-1 draft fields with **`PATCH /api/v1/auth/otc/deposits/{id}/draft`** while **`status`** is **`draft`**. - name: OTC Withdrawals description: >- OTC crypto-to-fiat withdrawals (bank or mobile money). Merchants create. Admin approves and executes. - name: OTC Config description: OTC display config (bank details, mobile money paybill) for merchant UI - name: Fiat Currencies description: > Shared platform **fiat_currencies** catalog. **GET /api/v1/auth/fiat-currencies** lists active rows for UI pickers. **GET /api/v1/auth/fiat-currencies/admin** lists all rows including inactive (admin). Admin manages rows with **GET /api/v1/auth/fiat-currencies/{id}**, **POST /api/v1/auth/fiat-currencies**, **PATCH /api/v1/auth/fiat-currencies/{id}**, and **DELETE /api/v1/auth/fiat-currencies/{id}**. Use for OTC, pricing, orders, remittance, and backoffice — not under **`/otc/...`**. Prefer **PATCH** with **`is_active: false`** over delete when a currency is referenced. - name: Countries description: >- Shared platform **countries** catalog. Public **GET /api/v1/countries** lists active rows for pickers. Auth **GET /api/v1/auth/countries** returns the same active catalog. Admin manages rows with **GET /api/v1/auth/countries/admin**, **GET /api/v1/auth/countries/{id}**, **POST /api/v1/auth/countries**, **PATCH /api/v1/auth/countries/{id}**, and **DELETE /api/v1/auth/countries/{id}**. - name: Files description: Authenticated file uploads for OTC receipts and proof artifacts. paths: /api/v1/auth/merchants/{merchant_id}/sub-merchants: post: tags: - Merchants summary: Create Sub-Merchant Under A Master Merchant description: > Creates a **sub-merchant** whose `parent_vendor_id` points to the given master merchant. - Master merchant must be a vendor with `parent_vendor_id = null` - Sub-merchant user role is `subvendor` (not `vendor`) - Sub-merchants also receive default Ethereum, TRON, and Solana wallets (best-effort) - Returns **409** when **email** or **phone_number** conflicts. No sub-merchant row and no wallets are created. parameters: - name: merchant_id in: path required: true schema: type: string format: uuid description: Master merchant ID. requestBody: required: true content: application/json: schema: type: object required: - email - phone_number - first_name - last_name - password - kyc_status properties: email: type: string format: email phone_number: type: string first_name: type: string last_name: type: string password: type: string format: password kyc_status: type: string enum: - pending - approved - rejected is_active: type: boolean pin: type: string pattern: ^[0-9]{6}$ example: email: merchant1.branch1@gmail.com phone_number: '+254700000002' first_name: Bob last_name: Branch password: secret kyc_status: pending is_active: true pin: '654321' responses: '201': description: Sub-merchant created content: application/json: schema: type: object properties: message: type: string sub_merchant: $ref: '#/components/schemas/Merchant' wallets: type: array items: $ref: '#/components/schemas/MerchantWalletSummary' warning: type: string description: >- Present when one or more default wallets failed. Create missing wallets manually. wallet_errors: type: array items: $ref: '#/components/schemas/DefaultWalletFailure' example: message: Sub-merchant created successfully with default wallets sub_merchant: id: f004fba4-7b6c-423a-983b-fdc283f8a1ab email: merchant1.branch1@gmail.com phone_number: '+254700000002' first_name: Bob last_name: Branch role: subvendor kyc_status: pending is_active: true parent_vendor_id: a2aeca1d-9686-4158-b4be-d0a3fd04760e wallets: - id: 74b2bdea-8cf1-4fbf-9b28-5c48a56bda6b network: ethereum address: 1.4545186821318902e+47 is_default: true wallet_type: hot - id: 2f7e7c32-9623-4ca4-8733-fd07449bd6b8 network: tron address: TXpgi7XLZEQQgC7pR1iKuRsKyesskZkEqM is_default: false wallet_type: hot - id: b2c3d4e5-f6a7-8901-bcde-f12345678901 network: solana address: 9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM is_default: false wallet_type: hot '409': description: Email or phone_number already registered content: application/json: schema: type: object properties: error: type: string example: error: phone_number is already registered security: - bearerAuth: [] components: schemas: Merchant: type: object description: Merchant user summary (master **vendor** or **subvendor** branch). properties: id: type: string format: uuid email: type: string format: email phone_number: type: string first_name: type: string last_name: type: string role: type: string enum: - vendor - subvendor kyc_status: type: string is_active: type: boolean parent_vendor_id: type: string format: uuid nullable: true description: >- Null for master merchants. Set to the master vendor id for sub-merchants. MerchantWalletSummary: type: object properties: id: type: string format: uuid network: type: string enum: - ethereum - tron - solana address: type: string alias: type: integer format: int64 is_default: type: boolean wallet_type: type: string DefaultWalletFailure: type: object description: Per-network error when default wallet provisioning fails for one chain. properties: network: type: string enum: - ethereum - tron - solana error: type: string description: Error message from the failed wallet create attempt. securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: PASETO ````