feat: add send token action (#81)

* feat: add send token action

* feat: code review fixes

src/actions/index.ts

@@ -13,4 +13,5 @@ export * from './redeemBid';
 export * from './claimBid';
 export * from './instantSale';
 export * from './burnToken';
+export * from './sendToken';
 export * from './shared';

src/actions/sendToken.ts

@@ -0,0 +1,73 @@
+import { PublicKey } from '@solana/web3.js';
+import { ASSOCIATED_TOKEN_PROGRAM_ID, Token, TOKEN_PROGRAM_ID, u64 } from '@solana/spl-token';
+import { Wallet } from '../wallet';
+import { Connection } from '../Connection';
+import { sendTransaction } from './transactions';
+import { Transaction } from '../Transaction';
+import { Account } from '../Account';
+import { CreateAssociatedTokenAccount } from '../programs/shared/transactions/CreateAssociatedTokenAccount';
+
+interface ISendTokenParams {
+  connection: Connection;
+  wallet: Wallet;
+  // token account address
+  source: PublicKey;
+  // destination wallet address
+  destination: PublicKey;
+  mint: PublicKey;
+  amount: number | u64;
+}
+
+interface ISendTokenResponse {
+  txId: string;
+}
+
+export const sendToken = async ({
+  connection,
+  wallet,
+  source,
+  destination,
+  mint,
+  amount,
+}: ISendTokenParams): Promise<ISendTokenResponse> => {
+  const txs = [];
+  const destAta = await Token.getAssociatedTokenAddress(
+    ASSOCIATED_TOKEN_PROGRAM_ID,
+    TOKEN_PROGRAM_ID,
+    mint,
+    destination,
+  );
+  const transactionCtorFields = {
+    feePayer: wallet.publicKey,
+  };
+
+  try {
+    // check if the account exists
+    await Account.load(connection, destAta);
+  } catch {
+    txs.push(
+      new CreateAssociatedTokenAccount(transactionCtorFields, {
+        associatedTokenAddress: destAta,
+        splTokenMintAddress: mint,
+        walletAddress: destination,
+      }),
+    );
+  }
+
+  txs.push(
+    new Transaction(transactionCtorFields).add(
+      Token.createTransferInstruction(
+        TOKEN_PROGRAM_ID,
+        source,
+        destAta,
+        wallet.publicKey,
+        [],
+        amount,
+      ),
+    ),
+  );
+
+  const txId = await sendTransaction({ connection, wallet, txs });
+
+  return { txId };
+};