feat: skipping airdrop if desired

.gitignore

@@ -2,3 +2,4 @@ src/temp
 dist
 node_modules
 test-ledger
+.env*

README.md

@@ -332,18 +332,20 @@ How the keypair is initialized is dependant on the `initializeKeypairOptions`:
 interface initializeKeypairOptions {
   envFileName?: string;
   envVariableName?: string;
-  airdropAmount?: number;
+  airdropAmount?: number | null;
   minimumBalance?: number;
   keypairPath?: string;
 }
 ```
 
 By default, the keypair will be retrieved from the `.env` file. If a `.env` file does not exist, this function will create one with a new keypair under the optional `envVariableName`.
 
-To load the keypair from the filesystem, pass in the `keypairPath`.
+To load the keypair from the filesystem, pass in the `keypairPath`. When set, loading a keypair from the filesystem will take precedence over loading from the `.env` file.
 
 After the keypair has been loaded, it will check the account's balance. If the balance is below the `minimumBalance`, it will airdrop the account `airdropAmount`.
 
+After the keypair has been loaded, you can skip the airdrop on low balance by setting `airdropAmount` to `0` or `null`.
+
 To initialize a keypair from the `.env` file, and airdrop it 1 sol if it's beneath 0.5 sol:
 
 ```typescript

src/index.ts

@@ -206,7 +206,7 @@ export const addKeypairToEnvFile = async (
 export interface InitializeKeypairOptions {
   envFileName?: string;
   envVariableName?: string;
-  airdropAmount?: number;
+  airdropAmount?: number | null;
   minimumBalance?: number;
   keypairPath?: string;
 }
@@ -216,15 +216,14 @@ export const initializeKeypair = async (
   options?: InitializeKeypairOptions,
 ): Promise<Keypair> => {
   let {
-    envFileName,
-    envVariableName,
-    airdropAmount,
-    minimumBalance,
     keypairPath,
+    envFileName,
+    envVariableName = DEFAULT_ENV_KEYPAIR_VARIABLE_NAME,
+    airdropAmount = DEFAULT_AIRDROP_AMOUNT,
+    minimumBalance = DEFAULT_MINIMUM_BALANCE,
   } = options || {};
 
   let keypair: Keypair;
-  envVariableName = envVariableName || DEFAULT_ENV_KEYPAIR_VARIABLE_NAME;
 
   if (keypairPath) {
     keypair = await getKeypairFromFile(keypairPath);
@@ -235,12 +234,14 @@ export const initializeKeypair = async (
     await addKeypairToEnvFile(keypair, envVariableName, envFileName);
   }
 
-  await airdropIfRequired(
-    connection,
-    keypair.publicKey,
-    airdropAmount || DEFAULT_AIRDROP_AMOUNT,
-    minimumBalance || DEFAULT_MINIMUM_BALANCE,
-  );
+  if (!!airdropAmount) {
+    await airdropIfRequired(
+      connection,
+      keypair.publicKey,
+      airdropAmount,
+      minimumBalance,
+    );
+  }
 
   return keypair;
 };