HYBRID-CHAINDEVELOPERS
DOCUMENTATIONv2
POST

Issuer Launchpad

Link offering evidence

/api/v2/launchpad/offerings/{offering_id}/artifact-links
AUTHENTICATIONBearer token · launchpad:writeAUTHORITATIVE OWNERlaunchpad-serviceCONTRACT AUTHORITYGenerated Rust OpenAPISTATUSSource ready · production listed

PURPOSE + BUSINESS CONTEXT

Bind an offering to an exact Data Vault object version after the gateway re-resolves access, readiness, media type, and SHA-256 evidence.

WHEN THIS CALL IS USEFUL

Use during private preparation to bind a disclosure claim to an exact authorized Data Vault object version.

OUTCOME · Create or advance

What changes

Appends a version-pinned evidence link after gateway re-attestation; it does not disclose the object until an eligible release is finalized.

WHY IT MATTERS

  • Gives people and agents a contract-backed way to advance link offering evidence.
  • Connects private issuer preparation to public, citation-bearing disclosure without exposing draft evidence or collapsing review, signature, finality, and availability into one state.

ISOLATION + AUTHORITY

Workspace, issuer, offering, security-class draft, Data Vault object version, requirement pack, diligence case, evidence view, reviewer decision, auditor attestation, release, signer, validator finality, replication, public index, and investor eligibility remain distinct. Launchpad cannot issue, mint, custody, sell, trade, match, settle, or authorize an investment, and its public routes expose only finalized disclosure evidence.

BEFORE YOU CALL

  • Authenticate at the documented boundary: bearer+scope.
  • Supply the required offering_id (path), object_id (body), version_id (body), source_sha256 (body) exactly as defined by the live contract.
  • Use one Idempotency-Key only for retries of the same byte-equivalent logical mutation.
  • Resolve the authenticated workspace and derived issuer, reviewer, auditor, signer, or publisher authority for this stage; use exact Data Vault versions and distinguish private preparation from finalized public disclosure.

WHAT TO DO NEXT

  • Re-read link offering evidence using the canonical identifier returned by this operation.
  • Reconcile an ambiguous response with the same idempotency key before attempting another mutation.
  • Follow returned canonical identifiers and commitments into the next explicit Launchpad stage, re-attesting protected evidence and re-reading release finality before public reliance.

AGENT GUIDANCE

  • Use link offering evidence only for the purpose and lifecycle stage described by this operation; do not treat it as authority for an adjacent action.
  • Supply the required offering_id (path), object_id (body), version_id (body), source_sha256 (body) exactly as defined by the live contract.
  • Keep draft creation, evidence linking, evidence-view pinning, review, attestation, release assembly, freeze, signature, submission, validator finality, replicated availability, indexing, and supersession as separate lifecycle facts.
  • After a timeout or conflict, read authoritative state before deciding whether an equivalent retry is safe.
MACHINE CONTRACT

The exact deployed parameters, schemas, responses, security requirements, and Hybrid-Chain agent metadata are authoritative at this operation's production OpenAPI JSON Pointer. The readable tables below add integration guidance; the deployed OpenAPI controls if guidance and the machine contract ever differ.

Open the authoritative production contract ↗

EXTENDED INTEGRATION GUIDANCE

Readable request and response reference

Examples illustrate integration intent; the referenced OpenAPI operation and component schemas define the executable shape.

PARAMETERS

Headers, path, query, and body

NAMELOCATIONPRESENCETYPE / RULES / PURPOSE
AuthorizationheaderRequired

Bearer tokenCredential containing launchpad:write authority.EXAMPLEBearer hc_live_…

offering_idpathRequired

identifierStable offering id selecting the exact resource addressed by this route.EXAMPLEoffering-id-01

X-Request-IDheaderOptional

stringOptional caller correlation identifier. The gateway emits the effective value on the response.

Idempotency-KeyheaderRequired

ASCII string · 1–128Caller-generated stable key reused for retries of the same logical mutation.

classificationbodyOptional

PUBLIC_AFTER_FINALITY | private classificationDisclosure policy for the evidence link; defaults to PUBLIC_AFTER_FINALITY.EXAMPLEPUBLIC_AFTER_FINALITY

object_idbodyRequired

Data Vault identifierAuthorized Data Vault object selected as offering evidence.EXAMPLEvault-object-01J8FQ

source_sha256bodyRequired

SHA-256 · lowercase hexSHA-256 of original document bytes, verified against the exact upload's domain-separated Vault commitment; never an audit-event hash.EXAMPLEdddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

version_idbodyRequired

Data Vault version identifierExact immutable object version re-resolved and attested by the gateway.EXAMPLEvault-version-01J8FR

REQUEST

JSON body example

{
  "classification": "PUBLIC_AFTER_FINALITY",
  "object_id": "vault-object-01J8FQ",
  "source_sha256": "dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd",
  "version_id": "vault-version-01J8FR"
}

RESPONSES

Status and payload examples

201Mutation accepted and canonical state returned.Mutation completed · JSON RESPONSE+
{}
INTEGRATION DECISION
CALLER ACTION
Accept the returned representation or receipt, then re-read link offering evidence using the canonical identifier returned by this operation.
RETRY SAFETY
Do not repeat a successful mutation merely to confirm it. For one logical mutation, retain the same Idempotency-Key and byte-equivalent request. Never reuse that key for changed instructions.
STATE RECONCILIATION
Persist returned identifiers, versions, commitments, and receipts. Refresh the offering revision, evidence commitments, review and disclosure status, readiness milestone, issuer authority, and publication or finality receipt.
400Required headers or the canonical source-file digest are missing or malformed.Request must change · JSON RESPONSE+
{
  "code": "invalid_credentials",
  "message": "the supplied Hybrid credential is invalid"
}
INTEGRATION DECISIONinvalid_credentials
CALLER ACTION
Rebuild the request from the live OpenAPI operation and correct the rejected method, media type, header, parameter, or body field.
RETRY SAFETY
Do not retry the same invalid request. For one logical mutation, retain the same Idempotency-Key and byte-equivalent request. Never reuse that key for changed instructions.
STATE RECONCILIATION
Compare the submitted values with the documented constraints before another call. Refresh the offering revision, evidence commitments, review and disclosure status, readiness milestone, issuer authority, and publication or finality receipt.
ESCALATE WHEN
Escalate when issuer authority, diligence evidence, disclosures, approvals, publication, or chain finality cannot be matched to one immutable revision.
401Bearer credential is missing, expired, or invalid.Authentication required · JSON RESPONSE+
{
  "code": "invalid_credentials",
  "message": "the supplied Hybrid credential is invalid"
}
INTEGRATION DECISIONinvalid_credentials
CALLER ACTION
Discard the rejected credential, complete the documented authentication or reassertion flow, and rebuild any request signature with fresh timestamps and nonces.
RETRY SAFETY
Retry only with a newly valid credential and fresh replay-protection values. For one logical mutation, retain the same Idempotency-Key and byte-equivalent request. Never reuse that key for changed instructions.
STATE RECONCILIATION
Assume the outcome is unknown only when the connection failed after transmission; otherwise authentication failed before domain work. Refresh the offering revision, evidence commitments, review and disclosure status, readiness milestone, issuer authority, and publication or finality receipt.
ESCALATE WHEN
Escalate when issuer authority, diligence evidence, disclosures, approvals, publication, or chain finality cannot be matched to one immutable revision.
403The principal lacks the required scope, role, tenant, or step-up authority.Authority or policy denied · JSON RESPONSE+
{
  "code": "invalid_credentials",
  "message": "the supplied Hybrid credential is invalid"
}
INTEGRATION DECISIONinvalid_credentials
CALLER ACTION
Verify the exact scope, tenant or workspace membership, owner boundary, step-up purpose, feature policy, and resource eligibility. Never broaden authority automatically.
RETRY SAFETY
Do not retry until the missing authority or policy condition has been deliberately resolved with least privilege.
STATE RECONCILIATION
Confirm the caller and resource resolve to the same authority boundary for issuer-private offerings, evidence, reviews, disclosures, readiness milestones, publication, and finality receipts.
ESCALATE WHEN
Escalate when issuer authority, diligence evidence, disclosures, approvals, publication, or chain finality cannot be matched to one immutable revision.
422Path, query, or body validation failed.Request must change · JSON RESPONSE+
{
  "code": "invalid_credentials",
  "message": "the supplied Hybrid credential is invalid"
}
INTEGRATION DECISIONinvalid_credentials
CALLER ACTION
Rebuild the request from the live OpenAPI operation and correct the rejected method, media type, header, parameter, or body field.
RETRY SAFETY
Do not retry the same invalid request. For one logical mutation, retain the same Idempotency-Key and byte-equivalent request. Never reuse that key for changed instructions.
STATE RECONCILIATION
Compare the submitted values with the documented constraints before another call. Refresh the offering revision, evidence commitments, review and disclosure status, readiness milestone, issuer authority, and publication or finality receipt.
ESCALATE WHEN
Escalate when issuer authority, diligence evidence, disclosures, approvals, publication, or chain finality cannot be matched to one immutable revision.
502Data Vault omitted or returned an inconsistent exact upload content proof.Dependency unavailable or outcome uncertain · JSON RESPONSE+
{
  "code": "invalid_credentials",
  "message": "the supplied Hybrid credential is invalid"
}
INTEGRATION DECISIONinvalid_credentials
CALLER ACTION
Preserve the exact request and treat the outcome as uncertain until authoritative state proves whether it committed.
RETRY SAFETY
Reconcile before retrying. For one logical mutation, retain the same Idempotency-Key and byte-equivalent request. Never reuse that key for changed instructions. Use bounded backoff with jitter.
STATE RECONCILIATION
Refresh the offering revision, evidence commitments, review and disclosure status, readiness milestone, issuer authority, and publication or finality receipt.
ESCALATE WHEN
Escalate when issuer authority, diligence evidence, disclosures, approvals, publication, or chain finality cannot be matched to one immutable revision.
503The authoritative service or read model is unavailable.Dependency unavailable or outcome uncertain · JSON RESPONSE+
{
  "code": "invalid_credentials",
  "message": "the supplied Hybrid credential is invalid"
}
INTEGRATION DECISIONinvalid_credentials
CALLER ACTION
Preserve the exact request and treat the outcome as uncertain until authoritative state proves whether it committed.
RETRY SAFETY
Reconcile before retrying. For one logical mutation, retain the same Idempotency-Key and byte-equivalent request. Never reuse that key for changed instructions. Use bounded backoff with jitter.
STATE RECONCILIATION
Refresh the offering revision, evidence commitments, review and disclosure status, readiness milestone, issuer authority, and publication or finality receipt.
ESCALATE WHEN
Escalate when issuer authority, diligence evidence, disclosures, approvals, publication, or chain finality cannot be matched to one immutable revision.

OPERATIONAL NOTES

Security and lifecycle guarantees

  • Bind an offering to an exact Data Vault object version after the gateway re-resolves access, readiness, media type, and SHA-256 evidence.
  • The Rust gateway validates the public contract and routes only to the authoritative owner; clients never address internal services directly.
  • Mutations are retry-safe only when the same Idempotency-Key and canonical request body are reused.
  • The tables and examples are derived from the current gateway source OpenAPI. Re-fetch the deployed OpenAPI before execution; deployment status is shown separately on this page.
  • Only parameters present in the OpenAPI operation are accepted; undocumented query keys fail closed with HTTP 422.
DOCUMENTATION STATUS

This route is implemented in canonical gateway source and appears in the production OpenAPI snapshot observed 2026-09-11T06:35:11.572Z. Authentication, tenant, feature, venue, and market policy still apply.

Verify the exact production OpenAPI operation ↗Return to the V2 directory ↗