From feeb52dbf73bb804de2b89ae066f4154503452ca Mon Sep 17 00:00:00 2001
From: Sai Kranthi <iamsaikranthi@gmail.com>
Date: Fri, 14 Jul 2023 10:15:35 +0530
Subject: [PATCH] feat(sdk): enable RBF

---
 packages/sdk/src/inscription/collection.ts      |  2 +-
 packages/sdk/src/inscription/instant-buy.ts     | 12 ++++++++----
 packages/sdk/src/transactions/OrdTransaction.ts |  1 +
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/packages/sdk/src/inscription/collection.ts b/packages/sdk/src/inscription/collection.ts
index 20abf187..45529c13 100644
--- a/packages/sdk/src/inscription/collection.ts
+++ b/packages/sdk/src/inscription/collection.ts
@@ -151,7 +151,7 @@ export type PublishCollectionOptions = {
 export type CollectionInscription = {
   iid: string;
   lim: number;
-  sri: string;
+  sri?: string;
 };
 
 export type MintFromCollectionOptions = {
diff --git a/packages/sdk/src/inscription/instant-buy.ts b/packages/sdk/src/inscription/instant-buy.ts
index 219bfa64..7890fece 100644
--- a/packages/sdk/src/inscription/instant-buy.ts
+++ b/packages/sdk/src/inscription/instant-buy.ts
@@ -175,7 +175,8 @@ export async function generateBuyerPsbt({
     const input: any = {
       hash: dummyUtxo.txid,
       index: dummyUtxo.n,
-      nonWitnessUtxo: rawTx.toBuffer()
+      nonWitnessUtxo: rawTx.toBuffer(),
+      sequence: 0xfffffffd // Needs to be at least 2 below max int value to be RBF
     };
 
     const p2shInputRedeemScript: any = {};
@@ -262,7 +263,8 @@ export async function generateBuyerPsbt({
     const input: any = {
       hash: utxo.txid,
       index: utxo.n,
-      nonWitnessUtxo: rawTx.toBuffer()
+      nonWitnessUtxo: rawTx.toBuffer(),
+      sequence: 0xfffffffd // Needs to be at least 2 below max int value to be RBF
     };
 
     if (pubKeyType === "taproot") {
@@ -372,7 +374,8 @@ export async function generateDummyUtxos({
     const input: any = {
       hash: utxo.txid,
       index: utxo.n,
-      nonWitnessUtxo: rawTx.toBuffer()
+      nonWitnessUtxo: rawTx.toBuffer(),
+      sequence: 0xfffffffd, // Needs to be at least 2 below max int value to be RBF
     };
 
     if (pubKeyType === "taproot") {
@@ -525,7 +528,8 @@ export async function getSellerInputsOutputs({
       const data: any = {
         hash: ordUtxo.txid,
         index: parseInt(ordUtxo.n),
-        nonWitnessUtxo: rawTx.toBuffer()
+        nonWitnessUtxo: rawTx.toBuffer(),
+        sequence: 0xfffffffd // Needs to be at least 2 below max int value to be RBF
       };
       const postage = ordUtxo.sats;
 
diff --git a/packages/sdk/src/transactions/OrdTransaction.ts b/packages/sdk/src/transactions/OrdTransaction.ts
index b3b8e30a..ea7ed4bf 100644
--- a/packages/sdk/src/transactions/OrdTransaction.ts
+++ b/packages/sdk/src/transactions/OrdTransaction.ts
@@ -90,6 +90,7 @@ export class OrdTransaction {
 
     try {
       psbt.addInput({
+        sequence: 0xfffffffd, // Needs to be at least 2 below max int value to be RBF
         hash: this.#suitableUnspent.txid,
         index: parseInt(this.#suitableUnspent.n),
         tapInternalKey: Buffer.from(this.#xKey, "hex"),