add optional position mint params (#121)

* add optional position mint params

* switch from keypair to pubkey

* PR fixes

sdk/src/impl/whirlpool-impl.ts

@@ -94,7 +94,8 @@ export class WhirlpoolImpl implements Whirlpool {
     tickUpper: number,
     liquidityInput: IncreaseLiquidityInput,
     wallet?: Address,
-    funder?: Address
+    funder?: Address,
+    positionMint?: PublicKey
   ) {
     await this.refresh();
     return this.getOpenPositionWithOptMetadataTx(
@@ -102,7 +103,9 @@ export class WhirlpoolImpl implements Whirlpool {
       tickUpper,
       liquidityInput,
       !!wallet ? AddressUtil.toPubKey(wallet) : this.ctx.wallet.publicKey,
-      !!funder ? AddressUtil.toPubKey(funder) : this.ctx.wallet.publicKey
+      !!funder ? AddressUtil.toPubKey(funder) : this.ctx.wallet.publicKey,
+      false,
+      positionMint
     );
   }
 
@@ -111,8 +114,8 @@ export class WhirlpoolImpl implements Whirlpool {
     tickUpper: number,
     liquidityInput: IncreaseLiquidityInput,
     sourceWallet?: Address,
-    positionWallet?: Address,
-    funder?: Address
+    funder?: Address,
+    positionMint?: PublicKey
   ) {
     await this.refresh();
     return this.getOpenPositionWithOptMetadataTx(
@@ -121,7 +124,8 @@ export class WhirlpoolImpl implements Whirlpool {
       liquidityInput,
       !!sourceWallet ? AddressUtil.toPubKey(sourceWallet) : this.ctx.wallet.publicKey,
       !!funder ? AddressUtil.toPubKey(funder) : this.ctx.wallet.publicKey,
-      true
+      true,
+      positionMint
     );
   }
 
@@ -253,7 +257,8 @@ export class WhirlpoolImpl implements Whirlpool {
     liquidityInput: IncreaseLiquidityInput,
     wallet: PublicKey,
     funder: PublicKey,
-    withMetadata: boolean = false
+    withMetadata: boolean = false,
+    positionMint?: PublicKey
   ): Promise<{ positionMint: PublicKey; tx: TransactionBuilder }> {
     invariant(TickUtil.checkTickInBounds(tickLower), "tickLower is out of bounds.");
     invariant(TickUtil.checkTickInBounds(tickUpper), "tickUpper is out of bounds.");
@@ -277,13 +282,14 @@ export class WhirlpoolImpl implements Whirlpool {
     );
 
     const positionMintKeypair = Keypair.generate();
+    const positionMintPubkey = positionMint ?? positionMintKeypair.publicKey;
     const positionPda = PDAUtil.getPosition(
       this.ctx.program.programId,
-      positionMintKeypair.publicKey
+      positionMintPubkey
     );
-    const metadataPda = PDAUtil.getPositionMetadata(positionMintKeypair.publicKey);
+    const metadataPda = PDAUtil.getPositionMetadata(positionMintPubkey);
     const positionTokenAccountAddress = getAssociatedTokenAddressSync(
-      positionMintKeypair.publicKey,
+      positionMintPubkey,
       wallet,
       this.ctx.accountResolverOpts.allowPDAOwnerAddress
     );
@@ -301,14 +307,17 @@ export class WhirlpoolImpl implements Whirlpool {
         owner: wallet,
         positionPda,
         metadataPda,
-        positionMintAddress: positionMintKeypair.publicKey,
+        positionMintAddress: positionMintPubkey,
         positionTokenAccount: positionTokenAccountAddress,
         whirlpool: this.address,
         tickLowerIndex: tickLower,
         tickUpperIndex: tickUpper,
       }
     );
-    txBuilder.addInstruction(positionIx).addSigner(positionMintKeypair);
+    txBuilder.addInstruction(positionIx);
+    if(positionMint === undefined) {
+      txBuilder.addSigner(positionMintKeypair);
+    }
 
     const [ataA, ataB] = await resolveOrCreateATAs(
       this.ctx.connection,
@@ -360,7 +369,7 @@ export class WhirlpoolImpl implements Whirlpool {
     txBuilder.addInstruction(liquidityIx);
 
     return {
-      positionMint: positionMintKeypair.publicKey,
+      positionMint: positionMintPubkey,
       tx: txBuilder,
     };
   }

sdk/src/whirlpool-client.ts

@@ -211,6 +211,7 @@ export interface Whirlpool {
    * @param liquidityInput - an InputLiquidityInput type to define the desired liquidity amount to deposit
    * @param wallet - the wallet to withdraw tokens to deposit into the position and house the position token. If null, the WhirlpoolContext wallet is used.
    * @param funder - the wallet that will fund the cost needed to initialize the position. If null, the WhirlpoolContext wallet is used.
+   * @param positionMint - the mint address of the position token to be created. If null, a new mint address will be created.
    * @return `positionMint` - the position to be created. `tx` - The transaction containing the instructions to perform the operation on chain.
    */
   openPosition: (
@@ -218,7 +219,8 @@ export interface Whirlpool {
     tickUpper: number,
     liquidityInput: IncreaseLiquidityInput,
     wallet?: Address,
-    funder?: Address
+    funder?: Address,
+    positionMint?: PublicKey
   ) => Promise<{ positionMint: PublicKey; tx: TransactionBuilder }>;
 
   /**
@@ -233,6 +235,7 @@ export interface Whirlpool {
    * @param liquidityInput - input that defines the desired liquidity amount and maximum tokens willing to be to deposited.
    * @param wallet - the wallet to withdraw tokens to deposit into the position and house the position token. If null, the WhirlpoolContext wallet is used.
    * @param funder - the wallet that will fund the cost needed to initialize the position. If null, the WhirlpoolContext wallet is used.
+   * @param positionMint - the mint address of the position token to be created. If null, a new mint address will be created.
    * @return `positionMint` - the position to be created. `tx` - The transaction containing the instructions to perform the operation on chain.
    */
   openPositionWithMetadata: (
@@ -240,7 +243,8 @@ export interface Whirlpool {
     tickUpper: number,
     liquidityInput: IncreaseLiquidityInput,
     wallet?: Address,
-    funder?: Address
+    funder?: Address,
+    positionMint?: PublicKey
   ) => Promise<{ positionMint: PublicKey; tx: TransactionBuilder }>;
 
   /**