refactor: replace FirstAdded with Nonce

Author: frrist

capabilities/pdp/sign/piecesadd.go

@@ -11,10 +11,10 @@ import (
 const PiecesAddAbility = "pdp/sign/pieces/add"
 
 type PiecesAddCaveats struct {
-	DataSet    *big.Int
-	FirstAdded *big.Int
-	PieceData  [][]byte
-	Metadata   []Metadata
+	DataSet   *big.Int
+	Nonce     *big.Int
+	PieceData [][]byte
+	Metadata  []Metadata
 	// Proofs are links to `blob/accept` receipts for sub-pieces included in each
 	// piece. They are proofs that the sub-pieces were requested to be stored by
 	// the node. They correspond to items in `PieceData` i.e. Proofs[0] is the

capabilities/pdp/sign/piecesadd_test.go

@@ -18,9 +18,9 @@ import (
 
 func TestPiecesAdd(t *testing.T) {
 	piecesAddCaveats := sign.PiecesAddCaveats{
-		DataSet:    testutil.RandomBigInt(t),
-		FirstAdded: testutil.RandomBigInt(t),
-		PieceData:  [][]byte{testutil.RandomBytes(t, 32), testutil.RandomBytes(t, 32)},
+		DataSet:   testutil.RandomBigInt(t),
+		Nonce:     testutil.RandomBigInt(t),
+		PieceData: [][]byte{testutil.RandomBytes(t, 32), testutil.RandomBytes(t, 32)},
 		Metadata: []sign.Metadata{
 			{
 				Keys:   []string{"foo"},

capabilities/pdp/sign/sign.ipldsch

@@ -18,7 +18,7 @@ type DataSetCreateCaveats struct {
 
 type PiecesAddCaveats struct {
   dataSet BigInt
-  firstAdded BigInt
+  nonce BigInt
   pieceData [Bytes]
   metadata [{String:String}]
   proofs [[Link]]