> ## Documentation Index > Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt > Use this file to discover all available pages before exploring further. # Pay BACEN an amount SLB never demanded > Submits an SLB0007 paying BACEN an amount no SLB0001 charged, including the return of a credit BACEN made with an SLB0005 — name that credit's control number to make the payment a return (RSLB0008). Unlike the charge authorisation this command is bounded by nothing but its own fields, which is why it carries its own scope. When the deployment configures an alçada band covering the amount, the message parks in PENDING_APPROVAL until the required signatures are collected. Idempotent — the X-Idempotency key lives with the payment: the same key and parsed request (member order and whitespace do not count; any other difference, such as number spelling, null for an absent field, or an unknown member, is another request) answer the stored payment with X-Idempotency-Replayed: true, also after X-TTL has dropped the cached response, and the same key with another request answers 422. ## OpenAPI ````yaml /pt/openapi/v3-current/spb.yaml post /v1/str/slb-bacen-payments openapi: 3.1.0 info: contact: email: contact@lerian.studio name: Lerian Studio url: https://lerian.studio description: >- OpenAPI 3.1 surface for Lerian SPB, the direct integration between the institution and the Brazilian Payment System (SPB) over the National Financial System Network (RSFN). It covers the Reserve Transfer System (STR): message registry and capability catalog, operation lifecycle (bank transfers, IBS repasses, liquidity transfers, returns and cancellations), reserve-account and schedule queries, alçada governance, SME and LDL operations, inbound quarantine triage, reconciliation, and event delivery. license: name: Lerian Studio General License title: Lerian SPB API version: 1.0.0 servers: - url: https://api.example.com description: >- Replace the example host with the URL provided during environment onboarding. security: [] tags: - description: Immutable audit-record trails for STR operations and lifecycle events. name: Audit - description: >- STR capability catalog describing supported message types and their constraints. name: Capabilities - description: >- ICP-Brasil certificate inventory with hot-reloadable rotation and activation. name: Certificates - description: >- STR compulsory-movement (RCO) family: the movements BACEN orders on a participant's reserve account, their answers and the periods they belong to. name: Compulsory - description: >- Maker-checker approval queue for emissions parked above their alçada band: list pending, sign (approve), and deny. name: EmissionApprovals - description: Operation event catalog enumerating the emitted domain event types. name: Events - description: >- Inbound GEN-family notice log (GEN0001 connectivity echo, GEN0004 transmission error, GEN0005 administrative notice). name: GenNotices - description: >- SPB alçada governance config: value-band table + per-message-type signature requirements, hot-reloaded at runtime. name: Governance - description: >- Read raw STR message status: list messages and read a single message by NUOp. name: Messages - description: Aggregated operational summaries and metrics across STR operations. name: OperationalIntelligence - description: >- STR operation lifecycle for bank transfers and IBS repasses, including returns and cancellations. name: Operations - description: >- Service readiness state covering startup self-probes and dependency health. name: Readiness - description: Reconciliation cases and the actions that resolve operation discrepancies. name: Reconciliation - description: >- Redesconto do Banco Central: collateralised intraday and one-business-day BCB lending against Selic-registered federal securities. One create door derives the nine RDC commands from four operator-facing kinds (contract, payment, conversion, cancellation), plus the two consultas over eligible-security prices and open positions. An accepted rediscount is not necessarily a settled one — Selic may hold the request for want of securities, and that middle state is reported as its own. name: Rediscounts - description: >- STR Relatórios suite: synchronous, date-ranged aggregate reports (movimento financeiro, transações rejeitadas, volumetria) over Lerian SPB's own transmission record. name: Reports - description: >- STR0013 reserve-account balance and STR0014 statement (extrato, message-mode) queries and their async results. name: ReserveQueries - description: >- GEN0019 participant responsável roster: full-replacement updates announced to BACEN. name: Responsibles - description: STR operating-window schedule governing when operations may be sent. name: Schedule - description: >- STR0001 single-party schedule queries (consulta de horários do STR) and their async STR0001R1 grid results. name: ScheduleQueries - description: >- STR lançamentos (SLB) family: the charges BACEN raises against this participant, the payments that settle them, payments to BACEN it never demanded, and the entry consultas over them. name: SLB - description: >- Reads over an IEME's conta correspondente a moeda eletrônica (CCME): SME0003 statement (extrato) queries and their async SME0003R1 results, plus the log of SME0001R2/SME0002R2/SME0004R2 movement advices the STR delivered about movements this rail did not command. name: SMEQueries - description: Runtime SPB configuration settings for the STR integration. name: Settings - description: >- Flow (mandatory order): certificate → readiness → connectivity-test → submit. Activate a certificate, confirm the rail reports ready, pass a connectivity test, then submit an operation. Each step is its own resource; a submit must not be attempted before readiness passes. name: onboarding - description: >- Flow (mandatory order): parent operation SETTLED → return/cancel. A return or cancellation is a sub-resource of a settled parent operation; the {operationId}/{endToEndID} path segment enforces the parent structurally. name: lifecycle paths: /v1/str/slb-bacen-payments: post: tags: - SLB summary: Pay BACEN an amount SLB never demanded description: >- Submits an SLB0007 paying BACEN an amount no SLB0001 charged, including the return of a credit BACEN made with an SLB0005 — name that credit's control number to make the payment a return (RSLB0008). Unlike the charge authorisation this command is bounded by nothing but its own fields, which is why it carries its own scope. When the deployment configures an alçada band covering the amount, the message parks in PENDING_APPROVAL until the required signatures are collected. Idempotent — the X-Idempotency key lives with the payment: the same key and parsed request (member order and whitespace do not count; any other difference, such as number spelling, null for an absent field, or an unknown member, is another request) answer the stored payment with X-Idempotency-Replayed: true, also after X-TTL has dropped the cached response, and the same key with another request answers 422. operationId: createSLBBACENPayment parameters: - description: Idempotency key. Required on every mutation. in: header name: X-Idempotency required: true schema: description: Idempotency key. Required on every mutation. type: string - description: >- Seconds the cached response is kept; it may only shorten IDEMPOTENCY_DEFAULT_TTL_SEC. The key itself lives with the payment. in: header name: X-TTL schema: description: >- Seconds the cached response is kept; it may only shorten IDEMPOTENCY_DEFAULT_TTL_SEC. The key itself lives with the payment. type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/CreateSLBBACENPaymentRequest' required: true responses: '202': content: application/json: schema: $ref: '#/components/schemas/SLBSubmissionAccepted' description: Accepted headers: X-Idempotency-Replayed: schema: description: >- true when the X-Idempotency key already holds a payment: the body is that payment and nothing new was sent to the STR. type: string '400': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Bad Request '401': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unauthorized '403': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Forbidden '409': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Conflict '413': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Request Entity Too Large '415': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unsupported Media Type '422': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unprocessable Entity '429': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Too Many Requests '500': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Internal Server Error '503': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Service Unavailable '504': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Gateway Timeout default: content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Error security: - BearerAuth: [] components: schemas: CreateSLBBACENPaymentRequest: additionalProperties: false properties: agreementCnpj: description: Optional agreement CNPJ (CNPJConv). examples: - '00038166000105' maxLength: 14 type: string amount: description: Payment amount in decimal reais (VlrLanc). examples: - '2500.75' pattern: ^[1-9][0-9]{0,15}\.[0-9]{2}$|^0\.(0[1-9]|[1-9][0-9])$ type: string controlNumberSLBOriginal: description: >- Control number of the SLB0005 credit being returned (RSLB0008). Omit it for a spontaneous payment. examples: - SLB20260915000000009 maxLength: 20 type: string description: description: >- Free text (Hist). Mandatory on this message — SLB0002 declares no Hist at all, and that asymmetry is BACEN's. examples: - DEVOLUCAO DE CREDITO maxLength: 200 minLength: 1 type: string preferenceLevel: description: Optional processing preference (NivelPref). examples: - '0001' maxLength: 4 type: string purpose: description: >- BACEN finalidade code (FinlddSLB) of the payment. Mandatory on this message. examples: - '01' maxLength: 4 minLength: 1 type: string required: - purpose - amount - description type: object SLBSubmissionAccepted: additionalProperties: false properties: correlationId: description: Request-scoped correlation identifier echoing X-Request-ID. examples: - req-7a3f9c2e type: string id: description: >- Correlation id (the outbound NUOp). The answer leg is correlated to it. examples: - '46026562202609150000001' type: string messageType: description: The SLB wire code that was submitted. examples: - SLB0002 type: string movementDate: description: >- BACEN business date (DtMovto) stamped on the frame, derived server-side. examples: - '2026-09-15' type: string numCtrlPart: description: >- This participant's own control number for the message — the handle BACEN quotes back on the answer. examples: - '20260915000000000001' type: string status: description: >- SUBMITTED when the message was queued for the rail, PENDING_APPROVAL when the configured alçada band parked it awaiting signatures. examples: - SUBMITTED type: string submittedAt: description: RFC3339 UTC timestamp the message was submitted. examples: - '2026-09-15T12:00:00Z' type: string required: - id - numCtrlPart - messageType - status - movementDate - submittedAt - correlationId type: object Detail: additionalProperties: false properties: code: description: >- Stable, machine-readable domain error code scoped to the emitting service (format: -NNNN). type: string correlationId: description: Request-scoped correlation identifier echoing X-Request-ID. examples: - req-7a3f9c2e type: string detail: description: >- A human-readable explanation specific to this occurrence of the problem. examples: - Property foo is required but is missing. type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/ErrorDetail' type: - array - 'null' instance: description: >- A URI reference that identifies the specific occurrence of the problem. examples: - https://example.com/error-log/abc123 format: uri type: string status: description: HTTP status code examples: - 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. examples: - Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. examples: - https://example.com/errors/example format: uri type: string upstream: $ref: '#/components/schemas/Upstream' description: >- RFC 9457 extension member: the error a proxied third-party provider reported. Absent unless the emitting service explicitly surfaced one. required: - correlationId type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object Upstream: additionalProperties: false properties: code: description: The upstream provider's own error code, verbatim. examples: - E4001 type: string message: description: >- The upstream provider's own error message, verbatim (bounded, never its raw response body). examples: - account not found at provider type: string type: object securitySchemes: BearerAuth: bearerFormat: JWT description: JWT bearer token issued by the identity provider. scheme: bearer type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.