Implement JobRegistry::submit_deliverable with comprehensive docs and event logging

contracts/job_registry/src/lib.rs

@@ -81,6 +81,19 @@ pub struct BidAcceptedEvent {
     pub timestamp: u64,
 }
 
+/// Event emitted when a deliverable is submitted.
+///
+/// This event is published to enable off-chain indexing and monitoring
+/// of all deliverable submissions on the platform. Includes timestamp for audit trails.
+#[contracttype]
+#[derive(Clone)]
+pub struct DeliverableSubmittedEvent {
+    pub job_id: u64,
+    pub freelancer: Address,
+    pub deliverable_hash: Bytes,
+    pub timestamp: u64,
+}
+
 #[contract]
 pub struct JobRegistryContract;
 
@@ -258,7 +271,37 @@ impl JobRegistryContract {
         Ok(())
     }
 
-    /// Freelancer submits deliverable IPFS hash.
+    /// Freelancer submits a deliverable for a job in progress.
+    ///
+    /// This is the core operation enabling freelancers to submit completed work
+    /// for jobs they have been assigned to. The deliverable is stored as an IPFS
+    /// hash to minimize on-chain storage while maintaining decentralized content
+    /// accessibility. Validation ensures:
+    /// 1. The freelancer is authenticated via Stellar signature
+    /// 2. The job exists and is in InProgress status
+    /// 3. The deliverable hash is not empty (content validation)
+    /// 4. The caller is the assigned freelancer for the job
+    ///
+    /// # Arguments
+    /// * `env` - The Soroban environment
+    /// * `job_id` - The unique identifier of the job
+    /// * `freelancer` - The address of the freelancer submitting the deliverable
+    /// * `hash` - The IPFS CID hash of the deliverable content
+    ///
+    /// # Returns
+    /// * `Ok(())` - If the deliverable is successfully submitted
+    /// * `Err(JobRegistryError::JobNotFound)` - If the job ID does not exist
+    /// * `Err(JobRegistryError::InvalidInput)` - If the deliverable hash is empty
+    /// * `Err(JobRegistryError::InvalidState)` - If the job status is not InProgress
+    /// * `Err(JobRegistryError::Unauthorized)` - If the caller is not the assigned freelancer
+    ///
+    /// # Security Considerations
+    /// * Requires freelancer authentication via `require_auth()` to prevent spoofing
+    /// * Validates job status to prevent premature or invalid submissions
+    /// * Prevents submission of invalid (empty) deliverable hashes
+    /// * Ensures only the assigned freelancer can submit deliverables
+    /// * Emits auditable event with timestamp for off-chain monitoring
+    /// * Stores deliverable hash persistently for escrow and dispute resolution
     pub fn submit_deliverable(
         env: Env,
         job_id: u64,
@@ -293,7 +336,12 @@ impl JobRegistryContract {
 
         env.events().publish(
             ("job_registry", "DeliverableSubmitted"),
-            (job_id, freelancer, env.ledger().timestamp()),
+            DeliverableSubmittedEvent {
+                job_id,
+                freelancer: freelancer.clone(),
+                deliverable_hash: hash.clone(),
+                timestamp: env.ledger().timestamp(),
+            },
         );
 
         Ok(())

contracts/job_registry/test_snapshots/test/test_full_lifecycle.1.json

@@ -1121,15 +1121,38 @@
               }
             ],
             "data": {
-              "vec": [
+              "map": [
                 {
-                  "u64": 1
+                  "key": {
+                    "symbol": "deliverable_hash"
+                  },
+                  "val": {
+                    "bytes": "516d44656c6976657261626c6548617368"
+                  }
                 },
                 {
-                  "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4"
+                  "key": {
+                    "symbol": "freelancer"
+                  },
+                  "val": {
+                    "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4"
+                  }
                 },
                 {
-                  "u64": 0
+                  "key": {
+                    "symbol": "job_id"
+                  },
+                  "val": {
+                    "u64": 1
+                  }
+                },
+                {
+                  "key": {
+                    "symbol": "timestamp"
+                  },
+                  "val": {
+                    "u64": 0
+                  }
                 }
               ]
             }

contracts/job_registry/test_snapshots/test/test_mark_disputed_from_deliverable_submitted.1.json

@@ -856,15 +856,38 @@
               }
             ],
             "data": {
-              "vec": [
+              "map": [
                 {
-                  "u64": 1
+                  "key": {
+                    "symbol": "deliverable_hash"
+                  },
+                  "val": {
+                    "bytes": "516d44656c6976657261626c65"
+                  }
                 },
                 {
-                  "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4"
+                  "key": {
+                    "symbol": "freelancer"
+                  },
+                  "val": {
+                    "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4"
+                  }
                 },
                 {
-                  "u64": 0
+                  "key": {
+                    "symbol": "job_id"
+                  },
+                  "val": {
+                    "u64": 1
+                  }
+                },
+                {
+                  "key": {
+                    "symbol": "timestamp"
+                  },
+                  "val": {
+                    "u64": 0
+                  }
                 }
               ]
             }

docs/contracts/job_registry.md

@@ -31,3 +31,32 @@ The `JobRegistry` contract manages job postings, bid submissions, bid acceptance
 ### Notes
 
 This implementation strengthens trustlessness by ensuring bid acceptance can only succeed for bidders who actually participated in the auction.
+
+## `submit_deliverable`
+
+### Purpose
+
+`submit_deliverable` is called by a freelancer to submit their completed work for a job that is in progress. The deliverable is stored as an IPFS hash, enabling decentralized content storage while maintaining on-chain auditability.
+
+### Behavior
+
+- Authenticates the caller with `freelancer.require_auth()`.
+- Validates that the deliverable hash is not empty to prevent invalid submissions.
+- Verifies the job exists and is currently in the `InProgress` state.
+- Confirms the caller is the assigned freelancer for the job.
+- Updates the job status to `DeliverableSubmitted`.
+- Stores the deliverable hash in persistent storage for later retrieval.
+- Emits a `DeliverableSubmitted` event with timestamp for on-chain auditing and off-chain indexing.
+
+### Errors
+
+`submit_deliverable` uses `JobRegistryError` to return structured error information:
+
+- `JobNotFound` (1): job does not exist.
+- `InvalidInput` (4): deliverable hash is empty.
+- `InvalidState` (5): job is not in `InProgress` status.
+- `Unauthorized` (3): caller is not the assigned freelancer for the job.
+
+### Notes
+
+This function is critical for the job completion workflow, enabling freelancers to submit their work while maintaining security through authentication and state validation. The IPFS hash storage minimizes on-chain data while preserving immutability and accessibility.