Document Signer Sdk Laravel Package

Product Decisions This Supports

• Build vs. buy on the e-signature integration layer. This package is a buy/adopt decision for the integration plumbing only — it does not replace the vendor contract, it replaces the custom glue code you would otherwise write per vendor. That reframes the decision from "which e-signature vendor" to "do we own an abstraction over our vendors."
• Multi-vendor and regional rollout. The SignatureProvider abstraction plus concrete provider mentions (DocuSign globally, ValidSign in the Benelux/EU) makes it viable to support a second or third provider for regional, procurement, or customer-preference reasons without forking the contract flow. This is the primary product unlock.
• Vendor negotiation leverage and exit planning. A uniform send() / downloadSignedDocument() / downloadAudit() surface means switching or adding a provider is an implementation task, not a re-architecture. Useful card to hold in renewal conversations, and a real mitigation for price-hike or deprecation risk.
• Compliance and audit artifact strategy. downloadAudit() returning the vendor's native completion certificate (Certificate of Completion, Evidence Summary Report) standardized to PDF lets you make "we retain a provider-issued audit certificate per executed contract" a consistent, auditable policy rather than a per-vendor manual step.
• Contract authoring workflow. HTML-with-placeholders ({[type:signer:name]}) plus Browsershot PDF rendering is a bet that contracts are generated from templates/data rather than hand-assembled in a vendor UI. That supports self-serve generation, CRM/CPQ-driven contract creation, and versioned template ownership in your own repo.
• Reliability posture. SignedDocumentUnavailableException is explicitly retryable, distinct from ProviderAuthenticationException, ProviderRateLimitException, and ProviderTransientException. This lets you make a deliberate product promise about when a signed document becomes retrievable, and design retry/notification behavior instead of a generic "something failed."
• Roadmap sequencing. v1.0.0 is the abstraction and the happy path. It does not cover embedded/white-label signing UX, signer identity verification, template management, or envelope status polling — those remain roadmap items, not solved problems.

When to Consider This Package

Adopt when:

• You already use, or realistically expect to use, two or more e-signature providers (regional footprint, M&A, customer-mandated vendor, cost tiers).
• Contracts are generated from your own data/templates and you want the rendered HTML/PDF to be the source of truth rather than the vendor's template editor.
• You need provider-issued audit certificates retained as a standard artifact for compliance, dispute, or internal audit.
• You are on PHP 8.2+ and can accept a Browsershot/headless-Chromium dependency in your rendering path (this is real infrastructure: Node, Chromium, memory, cold-start latency — treat it as a queue-bound job, not a request-time call).
• You want a small, opinionated, single-responsibility library rather than a full contract-lifecycle platform.

Look elsewhere when:

• You use exactly one provider and expect to keep using it. The vendor's own SDK is fewer moving parts and exposes capabilities this abstraction deliberately hides.
• You need embedded or white-label signing experiences, in-person/kiosk signing, or qualified electronic signatures (QES) with identity proofing — those are vendor-specific surfaces with vendor-specific UX, and a lowest-common-denominator abstraction will fight you.
• You need a persistent domain model — envelopes, recipients, signing order, reminders, status webhooks with replay, document storage. This release is an SDK, not a Laravel package with migrations, models, config publishing, or queue integration; that scaffolding is yours to build.
• Laravel integration is a hard requirement out of the box. Despite being framed as a Laravel/PHP package, v1.0.0 evidences no service provider, facade, config file, or queue/event integration. Budget for wrapping it yourself.
• You need production hardening evidence: v1.0.0 is the first public release, provider coverage is demonstrated by only two named vendors, and webhook handling is claimed in the abstraction but not detailed. Treat "webhook handling" as unproven until you verify signature validation, replay protection, and idempotency.

How to Pitch It (Stakeholders)

For executives — one paragraph: We're standardizing how our product talks to e-signature vendors. Today, integrating a vendor means writing bespoke code we can't reuse, which makes every vendor change a project and every renewal a one-sided negotiation. This library gives us a single internal interface for sending contracts, retrieving signed PDFs, and pulling the vendor's compliance certificate. The strategic value is optionality: we can add a regional provider for EU customers, or switch providers, without touching the contract flow. It is a v1.0.0 open-source dependency, not a platform — it reduces integration cost and vendor lock-in, but it does not give us a signing UI, identity verification, or a contract database. Those remain our build items.

For engineering — the honest summary:

• Clean, narrow abstraction: send(), downloadSignedDocument(), downloadAudit(), plus webhook handling. Provider differences are absorbed by mapping a single Document::$id to vendor-internal ids — a good call, it keeps caller code uniform.
• Exception hierarchy is the strongest part: retryable (SignedDocumentUnavailableException, ProviderTransientException, ProviderRateLimitException) is cleanly separated from terminal (ProviderAuthenticationException, ProviderValidationException, ProviderNotFoundException). Build your retry policy directly on this.
• Rendering is Browsershot → headless Chromium. Put it behind a queue, pin the Chromium version, and watch memory. This is your main operational cost.
• Gaps to close before production: no Laravel service provider/config/events; webhook signature verification and idempotency are unverified; no test doubles or fake provider shipped, so you'll write your own for CI; provider coverage beyond the two named vendors is unproven. PHP 8.2+ is a hard floor.
• Recommendation: adopt as an internal seam, wrap it thinly in your own service, and pin the version. Re-evaluate at v1.x once the webhook and Laravel-integration story is documented.