fix(sdk-coin-flrp): fix flrp import to P fee value

Ticket: WIN-8461

Author: mohd-kashif

modules/sdk-coin-flrp/src/lib/ImportInPTxBuilder.ts

@@ -132,6 +132,13 @@ export class ImportInPTxBuilder extends AtomicTransactionBuilder {
 
     // Calculate fee from transaction fee settings
     const fee = BigInt(this.transaction.fee.fee);
+
+    // Validate that totalAmount is sufficient to cover the fee (matching AVAX validation)
+    // This ensures we don't create transactions with insufficient funds
+    if (totalAmount < fee) {
+      throw new BuildTransactionError(`Utxo outputs get ${totalAmount.toString()} and ${fee.toString()} is required`);
+    }
+
     const outputAmount = totalAmount - fee;
 
     // Create the output for P-chain (TransferableOutput with TransferOutput)

modules/sdk-coin-flrp/test/unit/lib/importInPTxBuilder.ts

@@ -13,9 +13,9 @@ describe('Flrp Import In P Tx Builder', () => {
   describe('default fee', () => {
     const FIXED_FEE = (coinConfig.network as FlareNetwork).txFee;
 
-    it('should set fixedFee (1000000) by default in constructor', () => {
+    it('should set fixedFee (1261000) by default in constructor', () => {
       const txBuilder = factory.getImportInPBuilder();
-      // The fixedFee should be set from network.txFee = '1000000'
+      // The fixedFee should be set from network.txFee = '1261000'
       const transaction = (txBuilder as any).transaction;
       transaction._fee.fee.should.equal(FIXED_FEE);
     });

modules/statics/src/networks.ts

@@ -1942,7 +1942,7 @@ export class FlareP extends Mainnet implements FlareNetwork {
   hrp = 'flare';
   alias = 'P';
   vm = 'platformvm';
-  txFee = '1000000'; // defaults
+  txFee = '1261000'; // FLR P-chain import requires higher fee than base txFee
   maxImportFee = '10000000'; // defaults
   createSubnetTx = '100000000'; // defaults
   createChainTx = '100000000'; // defaults
@@ -1969,7 +1969,7 @@ export class FlarePTestnet extends Testnet implements FlareNetwork {
   alias = 'P';
   assetId = 'fxMAKpBQQpFedrUhWMsDYfCUJxdUw4mneTczKBzNg3rc2JUub';
   vm = 'platformvm';
-  txFee = '1000000'; // defaults
+  txFee = '1261000'; // FLR P-chain import requires higher fee than base txFee
   maxImportFee = '10000000'; // defaults
   createSubnetTx = '100000000'; // defaults
   createChainTx = '100000000'; // defaults