> ## 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. # Rotate ICP-Brasil certificate > Prerequisite: this is the first step of the onboarding chain (certificate → readiness → connectivity-test → submit); rotate the certificate before activating it (see activateCertificate), checking readiness (see getReadiness), or submitting any operation. Performs an evidence-emitting hot-reload of the ICP-Brasil/RSFN certificate pair. The new certificate must already exist on disk under the configured base path; this endpoint only swaps the in-memory pointer and emits an audit record. Idempotent — replaying the same X-Idempotency key with the same body returns the cached response. The response NEVER includes the private key path or key material. ## OpenAPI ````yaml en/openapi/v3-current/spb.yaml post /v1/str/certificates/rotate 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, reconciliation, and event delivery. license: name: Lerian Studio General License title: Lerian SPB API version: 1.0.0 servers: - url: https://spb.sandbox.lerian.net 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: >- Maker-checker approval queue for emissions parked above their alçada band: list pending, sign (approve), and deny. name: EmissionApprovals - description: Webhook event-delivery records with retry control for failed dispatches. name: EventDeliveries - 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: the value-band table and 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: >- STR reports suite: synchronous, date-ranged aggregate reports (financial movement, rejected transactions, 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: Runtime SPB configuration settings for the STR integration. name: Settings - description: Webhook endpoint registration and management for event delivery. name: Webhooks - 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/certificates/rotate: post: tags: - Certificates - onboarding summary: Rotate ICP-Brasil certificate description: >- Prerequisite: this is the first step of the onboarding chain (certificate → readiness → connectivity-test → submit); rotate the certificate before activating it (see activateCertificate), checking readiness (see getReadiness), or submitting any operation. Performs an evidence-emitting hot-reload of the ICP-Brasil/RSFN certificate pair. The new certificate must already exist on disk under the configured base path; this endpoint only swaps the in-memory pointer and emits an audit record. Idempotent — replaying the same X-Idempotency key with the same body returns the cached response. The response NEVER includes the private key path or key material. operationId: rotateCertificate parameters: - description: Idempotency key (primary). in: header name: X-Idempotency schema: description: Idempotency key (primary). type: string - description: Idempotency key (legacy alias for X-Idempotency). in: header name: X-Idempotency-Key schema: description: Idempotency key (legacy alias for X-Idempotency). type: string - description: Idempotency key TTL in seconds (overrides the configured default). in: header name: X-TTL schema: description: Idempotency key TTL in seconds (overrides the configured default). type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/RotateCertificateRequest' required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/RotateCertificateResponseWire' description: OK default: content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Error security: - BearerAuth: [] components: schemas: RotateCertificateRequest: additionalProperties: false properties: certificateRef: description: >- Operator-supplied reference to the new certificate material (filesystem path or secrets-manager URI), validated against the configured cert directory before any read. examples: - /etc/lerian/certs/2026-q2/icp-brasil.crt maxLength: 2048 minLength: 1 type: string privateKeyRef: description: >- Operator-supplied reference to the new private-key material (filesystem path or secrets-manager URI), validated against the configured cert directory before any read. examples: - /etc/lerian/certs/2026-q2/icp-brasil.key maxLength: 2048 minLength: 1 type: string reason: description: >- Optional operator rationale recorded in the audit evidence (max 512 chars). examples: - Quarterly rotation per ICP-Brasil policy maxLength: 512 type: string required: - certificateRef - privateKeyRef type: object RotateCertificateResponseWire: additionalProperties: false properties: auditId: description: UUID of the audit record written for this rotation. examples: - a1b2c3d4-e5f6-7890-abcd-ef1234567890 format: uuid type: string certificate: $ref: '#/components/schemas/CertificateStatusWire' description: State of the certificate after the rotation hot-reload. correlationId: description: >- Request-scoped correlation identifier echoing X-Request-ID, for pivoting from response to trace. examples: - req-7a3f9c2e type: string readiness: $ref: '#/components/schemas/ReadinessSummary' description: >- Optional post-rotation readiness summary; omitted when readiness lookup is unavailable. required: - certificate - auditId - correlationId type: object Detail: additionalProperties: false properties: code: description: >- Stable, machine-readable domain error code scoped to the emitting service (format: -NNNN). examples: - ERR-0001 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 type: object CertificateStatusWire: additionalProperties: false properties: certificateId: description: Certificate-state row UUID. examples: - 550e8400-e29b-41d4-a716-446655440000 format: uuid type: string daysUntilExpiry: description: Whole days remaining until expiry; null when expiry is unknown. examples: - 45 format: int64 type: integer expiresAt: description: RFC3339 UTC expiry timestamp; null when unknown. examples: - '2027-05-04T18:30:00Z' format: date-time type: string purpose: description: >- Role this certificate serves: OUTBOUND_SIGNING (signs submissions), INBOUND_PROCESS, BACEN_VERIFICATION, or EXTERNAL_RAIL. examples: - OUTBOUND_SIGNING type: string readinessImpact: description: >- Effect of this certificate's state on service readiness: NONE, WARNING, or BLOCKER. examples: - NONE type: string status: description: >- Current validity state: VALID, EXPIRING (within the warning window), EXPIRED, INVALID, or MISSING. examples: - VALID type: string updatedAt: description: RFC3339 UTC timestamp of the last certificate-state update. examples: - '2026-05-04T18:30:00Z' format: date-time type: string required: - certificateId - purpose - status - readinessImpact - updatedAt type: object ReadinessSummary: additionalProperties: false properties: blockers: description: >- Messages for conditions that block readiness; empty when there are none. examples: - - 'redis: connection refused' items: type: string type: - array - 'null' status: description: Aggregate readiness status. examples: - READY type: string warnings: description: >- Messages for non-blocking conditions that need attention; empty when there are none. examples: - - certificate expires in 12 days items: type: string type: - array - 'null' required: - status - blockers - warnings 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 securitySchemes: BearerAuth: bearerFormat: JWT description: JWT bearer token issued by the identity provider. scheme: bearer type: http ````