diff --git a/pkg/storageincentives/redistribution/inclusionproof.go b/pkg/storageincentives/redistribution/inclusionproof.go
index 1d62450a070..8b4f50c219f 100644
--- a/pkg/storageincentives/redistribution/inclusionproof.go
+++ b/pkg/storageincentives/redistribution/inclusionproof.go
@@ -28,20 +28,23 @@ type ChunkInclusionProofs struct {
 // github.com/ethersphere/storage-incentives/blob/ph_f2/src/Redistribution.sol
 // github.com/ethersphere/storage-incentives/blob/master/src/Redistribution.sol (when merged to master)
 type ChunkInclusionProof struct {
-	ProofSegments  []string `json:"proofSegments"`
-	ProveSegment   string   `json:"proveSegment"`
-	ProofSegments2 []string `json:"proofSegments2"`
-	ProveSegment2  string   `json:"proveSegment2"`
-	ChunkSpan      uint64   `json:"chunkSpan"`
-	ProofSegments3 []string `json:"proofSegments3"`
+	ProofSegments  []string     `json:"proofSegments"`
+	ProveSegment   string       `json:"proveSegment"`
+	ProofSegments2 []string     `json:"proofSegments2"`
+	ProveSegment2  string       `json:"proveSegment2"`
+	ChunkSpan      uint64       `json:"chunkSpan"`
+	ProofSegments3 []string     `json:"proofSegments3"`
+	PostageProof   PostageProof `json:"postageProof"`
+	SocProof       []SOCProof   `json:"socProofAttached"`
+}
 
+// SOCProof structure must exactly match
+// corresponding structure (of the same name) in Redistribution.sol smart contract.
+type PostageProof struct {
 	Signature string `json:"signature"`
-	ChunkAddr string `json:"chunkAddr"`
 	PostageId string `json:"postageId"`
 	Index     string `json:"index"`
 	TimeStamp string `json:"timeStamp"`
-
-	SocProofAttached []SOCProof `json:"socProofAttached"`
 }
 
 // SOCProof structure must exactly match
@@ -65,18 +68,19 @@ func NewChunkInclusionProof(proofp1, proofp2 bmt.Proof, proofp3 bmt.Proof, sampl
 	}
 
 	return ChunkInclusionProof{
-		ProofSegments:    proofp1Hex.ProofSegments,
-		ProveSegment:     proofp1Hex.ProveSegment,
-		ProofSegments2:   proofp2Hex.ProofSegments,
-		ProveSegment2:    proofp2Hex.ProveSegment,
-		ChunkSpan:        binary.LittleEndian.Uint64(proofp2.Span[:swarm.SpanSize]), // should be uint64 on the other size; copied from pkg/api/bytes.go
-		ProofSegments3:   proofp3Hex.ProofSegments,
-		Signature:        hex.EncodeToString(sampleItem.Stamp.Sig()),
-		ChunkAddr:        proofp1Hex.ProveSegment, // TODO refactor ABI
-		PostageId:        hex.EncodeToString(sampleItem.Stamp.BatchID()),
-		Index:            hex.EncodeToString(sampleItem.Stamp.Index()),
-		TimeStamp:        hex.EncodeToString(sampleItem.Stamp.Timestamp()),
-		SocProofAttached: socProof,
+		ProofSegments:  proofp1Hex.ProofSegments,
+		ProveSegment:   proofp1Hex.ProveSegment,
+		ProofSegments2: proofp2Hex.ProofSegments,
+		ProveSegment2:  proofp2Hex.ProveSegment,
+		ChunkSpan:      binary.LittleEndian.Uint64(proofp2.Span[:swarm.SpanSize]), // should be uint64 on the other size; copied from pkg/api/bytes.go
+		ProofSegments3: proofp3Hex.ProofSegments,
+		PostageProof: PostageProof{
+			Signature: hex.EncodeToString(sampleItem.Stamp.Sig()),
+			PostageId: hex.EncodeToString(sampleItem.Stamp.BatchID()),
+			Index:     hex.EncodeToString(sampleItem.Stamp.Index()),
+			TimeStamp: hex.EncodeToString(sampleItem.Stamp.Timestamp()),
+		},
+		SocProof: socProof,
 	}, nil
 }
 
diff --git a/pkg/storageincentives/testdata/inclusion-proofs.json b/pkg/storageincentives/testdata/inclusion-proofs.json
index 1ce7af47d0e..a5b7e9d4a4c 100644
--- a/pkg/storageincentives/testdata/inclusion-proofs.json
+++ b/pkg/storageincentives/testdata/inclusion-proofs.json
@@ -30,11 +30,12 @@
             "b68323ecaad1185a5e078f41c94c59d0b6dda5d57e109866e64d44acb8702846",
             "478adfa93a7bb904d0aa86ff0d559f43aa915ee7865592e717b72a24452181cb"
         ],
-        "signature": "a7c8d18a8279d3803169ebcf4e5a7dbdd4dffefa591eaad8d1ceaa636a793ad975e7f7b1087bcea4176525b0002edde0acbfda20dbd2dfbbe777cab38968fdc61b",
-        "chunkAddr": "7133885ac59dca7b97773acb740e978d41a4af45bd563067c8a3d863578488f1",
-        "postageId": "4c8efc14c8e3cee608174f995d7afe155897bf643a31226e4f1363bc97686aef",
-        "index": "0000000000080303",
-        "timeStamp": "0000000000030308",
+        "postageProof": {
+            "signature": "a7c8d18a8279d3803169ebcf4e5a7dbdd4dffefa591eaad8d1ceaa636a793ad975e7f7b1087bcea4176525b0002edde0acbfda20dbd2dfbbe777cab38968fdc61b",
+            "postageId": "4c8efc14c8e3cee608174f995d7afe155897bf643a31226e4f1363bc97686aef",
+            "index": "0000000000080303",
+            "timeStamp": "0000000000030308"
+        },
         "socProofAttached": [
             {
                 "signer": "0x827b44d53df2854057713b25cdd653eb70fe36c4",
@@ -75,11 +76,12 @@
             "b68323ecaad1185a5e078f41c94c59d0b6dda5d57e109866e64d44acb8702846",
             "478adfa93a7bb904d0aa86ff0d559f43aa915ee7865592e717b72a24452181cb"
         ],
-        "signature": "b0274fcda59e8aaffee803021971a764a017ce2c0f41c8ceb6eefdea807056f621a98feab5ebf33bb6065e49c050f413ec8840b008fc224d882ce5244ce3e0171c",
-        "chunkAddr": "535e6df58a122a8f5e6c851c19b3e042f4cd1b5c5a8c499581c9f6d4e3509182",
-        "postageId": "4c8efc14c8e3cee608174f995d7afe155897bf643a31226e4f1363bc97686aef",
-        "index": "0000000000080303",
-        "timeStamp": "0000000000030308",
+        "postageProof": {
+            "signature": "b0274fcda59e8aaffee803021971a764a017ce2c0f41c8ceb6eefdea807056f621a98feab5ebf33bb6065e49c050f413ec8840b008fc224d882ce5244ce3e0171c",
+            "postageId": "4c8efc14c8e3cee608174f995d7afe155897bf643a31226e4f1363bc97686aef",
+            "index": "0000000000080303",
+            "timeStamp": "0000000000030308"
+        },
         "socProofAttached": []
     },
     "proofLast": {
@@ -113,11 +115,12 @@
             "b68323ecaad1185a5e078f41c94c59d0b6dda5d57e109866e64d44acb8702846",
             "478adfa93a7bb904d0aa86ff0d559f43aa915ee7865592e717b72a24452181cb"
         ],
-        "signature": "6747c58ce8613486c696f5bb7393c9c59094371969c3a52bfaf75192c605f4ad7c70c6e71fdd320e20d005e42e94ee32102c234eb465f4f5fd9db60fcad0356b1c",
-        "chunkAddr": "5ba2c8b912fad4aeb4a11a960946d07b9f66bc40ac54d87224914d75f5aeea5f",
-        "postageId": "4c8efc14c8e3cee608174f995d7afe155897bf643a31226e4f1363bc97686aef",
-        "index": "0000000000080303",
-        "timeStamp": "0000000000030308",
+        "postageProof": {
+            "signature": "6747c58ce8613486c696f5bb7393c9c59094371969c3a52bfaf75192c605f4ad7c70c6e71fdd320e20d005e42e94ee32102c234eb465f4f5fd9db60fcad0356b1c",
+            "postageId": "4c8efc14c8e3cee608174f995d7afe155897bf643a31226e4f1363bc97686aef",
+            "index": "0000000000080303",
+            "timeStamp": "0000000000030308"
+        },
         "socProofAttached": []
     }
-}
+}
\ No newline at end of file