diff --git a/src/lib/bulkOperations.ts b/src/lib/bulkOperations.ts
new file mode 100644
index 00000000..ff4ea2ff
--- /dev/null
+++ b/src/lib/bulkOperations.ts
@@ -0,0 +1,341 @@
+
+import * as StellarSdk from "@stellar/stellar-sdk";
+import { getServer, NETWORKS, isValidPublicKey } from "./stellar";
+import { createOperation, buildTransaction, signAndSubmitTransaction } from "./transactionBuilder";
+
+export interface BulkOperationStatus {
+  id: string;
+  status: "pending" | "in_progress" | "completed" | "failed" | "rollback";
+  account: string;
+  error?: string;
+  result?: { hash: string; ledger: number; successful: boolean };
+  rollbackResult?: { hash: string; ledger: number; successful: boolean };
+  rollbackError?: string;
+}
+
+export interface BulkPaymentConfig {
+  sourceAccount: string;
+  payments: Array<{
+    destination: string;
+    amount: string;
+    assetType: "native" | "credit_alphanum4" | "credit_alphanum12";
+    assetCode?: string;
+    assetIssuer?: string;
+  }>;
+  secretKey: string;
+  network?: string;
+  concurrency?: number;
+  onProgress?: (status: BulkOperationStatus[]) => void;
+}
+
+export interface BulkTrustlineConfig {
+  sourceAccount: string;
+  trustlines: Array<{
+    assetCode: string;
+    assetIssuer: string;
+    limit?: string;
+  }>;
+  secretKey: string;
+  network?: string;
+  concurrency?: number;
+  onProgress?: (status: BulkOperationStatus[]) => void;
+}
+
+export interface RollbackConfig {
+  sourceAccount: string;
+  secretKey: string;
+  network?: string;
+  concurrency?: number;
+  onProgress?: (statuses: BulkOperationStatus[]) => void;
+}
+
+export class BulkOperationManager {
+  private async processInParallel<T>(
+    items: T[],
+    processor: (item: T, index: number) => Promise<BulkOperationStatus>,
+    concurrency: number = 5,
+    onProgress?: (statuses: BulkOperationStatus[]) => void
+  ): Promise<BulkOperationStatus[]> {
+    const statuses: BulkOperationStatus[] = items.map((_, index) => ({
+      id: `op-${index}`,
+      status: "pending" as const,
+      account: "",
+    }));
+
+    let inProgress = 0;
+    let nextIndex = 0;
+
+    const processNext = async () => {
+      while (nextIndex < items.length) {
+        if (inProgress >= concurrency) {
+          await new Promise(resolve => setTimeout(resolve, 50));
+          continue;
+        }
+
+        const currentIndex = nextIndex++;
+        inProgress++;
+
+        try {
+          statuses[currentIndex].status = "in_progress";
+          onProgress?.([...statuses]);
+
+          const result = await processor(items[currentIndex], currentIndex);
+          statuses[currentIndex] = result;
+        } catch (error) {
+          statuses[currentIndex] = {
+            id: `op-${currentIndex}`,
+            status: "failed",
+            account: "",
+            error: (error as Error).message,
+          };
+        } finally {
+          inProgress--;
+          onProgress?.([...statuses]);
+        }
+      }
+    };
+
+    const workers = Array.from({ length: concurrency }, processNext);
+    await Promise.all(workers);
+
+    return statuses;
+  }
+
+  async processBulkPayments(config: BulkPaymentConfig): Promise<BulkOperationStatus[]> {
+    const {
+      sourceAccount,
+      payments,
+      secretKey,
+      network = "testnet",
+      concurrency = 5,
+      onProgress,
+    } = config;
+
+    return this.processInParallel(
+      payments,
+      async (payment, index) => {
+        try {
+          const transaction = await buildTransaction({
+            sourceAccount,
+            operations: [
+              {
+                type: "payment",
+                params: payment,
+              },
+            ],
+            network,
+          });
+
+          const result = await signAndSubmitTransaction(transaction, secretKey, network);
+
+          return {
+            id: `op-${index}`,
+            status: "completed",
+            account: payment.destination,
+            result,
+          };
+        } catch (error) {
+          return {
+            id: `op-${index}`,
+            status: "failed",
+            account: payment.destination,
+            error: (error as Error).message,
+          };
+        }
+      },
+      concurrency,
+      onProgress
+    );
+  }
+
+  async processBulkTrustlines(config: BulkTrustlineConfig): Promise<BulkOperationStatus[]> {
+    const {
+      sourceAccount,
+      trustlines,
+      secretKey,
+      network = "testnet",
+      concurrency = 5,
+      onProgress,
+    } = config;
+
+    return this.processInParallel(
+      trustlines,
+      async (trustline, index) => {
+        try {
+          const transaction = await buildTransaction({
+            sourceAccount,
+            operations: [
+              {
+                type: "changeTrust",
+                params: trustline,
+              },
+            ],
+            network,
+          });
+
+          const result = await signAndSubmitTransaction(transaction, secretKey, network);
+
+          return {
+            id: `op-${index}`,
+            status: "completed",
+            account: sourceAccount,
+            result,
+          };
+        } catch (error) {
+          return {
+            id: `op-${index}`,
+            status: "failed",
+            account: sourceAccount,
+            error: (error as Error).message,
+          };
+        }
+      },
+      concurrency,
+      onProgress
+    );
+  }
+
+  async rollbackBulkPayments(
+    originalPayments: BulkPaymentConfig["payments"],
+    originalResults: BulkOperationStatus[],
+    config: RollbackConfig
+  ): Promise<BulkOperationStatus[]> {
+    const {
+      sourceAccount,
+      secretKey,
+      network = "testnet",
+      concurrency = 5,
+      onProgress,
+    } = config;
+
+    const rollbackItems = originalPayments.map((payment, index) => ({
+      payment,
+      originalResult: originalResults[index],
+    }));
+
+    return this.processInParallel(
+      rollbackItems,
+      async (item, index) => {
+        const { payment, originalResult } = item;
+        const status = { ...originalResult };
+
+        if (status.status !== "completed" || !status.result?.successful) {
+          return status;
+        }
+
+        try {
+          status.status = "rollback";
+          onProgress?.([
+            ...originalResults.slice(0, index),
+            status,
+            ...originalResults.slice(index + 1),
+          ]);
+
+          // Reverse the payment: send back from destination to source
+          const reverseTransaction = await buildTransaction({
+            sourceAccount: payment.destination,
+            operations: [
+              {
+                type: "payment",
+                params: {
+                  destination: sourceAccount,
+                  amount: payment.amount,
+                  assetType: payment.assetType,
+                  assetCode: payment.assetCode,
+                  assetIssuer: payment.assetIssuer,
+                },
+              },
+            ],
+            network,
+          });
+
+          const rollbackResult = await signAndSubmitTransaction(
+            reverseTransaction,
+            secretKey,
+            network
+          );
+
+          status.rollbackResult = rollbackResult;
+          return status;
+        } catch (error) {
+          status.rollbackError = (error as Error).message;
+          return status;
+        }
+      },
+      concurrency,
+      onProgress
+    );
+  }
+
+  async rollbackBulkTrustlines(
+    originalTrustlines: BulkTrustlineConfig["trustlines"],
+    originalResults: BulkOperationStatus[],
+    config: RollbackConfig
+  ): Promise<BulkOperationStatus[]> {
+    const {
+      sourceAccount,
+      secretKey,
+      network = "testnet",
+      concurrency = 5,
+      onProgress,
+    } = config;
+
+    const rollbackItems = originalTrustlines.map((trustline, index) => ({
+      trustline,
+      originalResult: originalResults[index],
+    }));
+
+    return this.processInParallel(
+      rollbackItems,
+      async (item, index) => {
+        const { trustline, originalResult } = item;
+        const status = { ...originalResult };
+
+        if (status.status !== "completed" || !status.result?.successful) {
+          return status;
+        }
+
+        try {
+          status.status = "rollback";
+          onProgress?.([
+            ...originalResults.slice(0, index),
+            status,
+            ...originalResults.slice(index + 1),
+          ]);
+
+          // Rollback by setting limit to 0
+          const rollbackTransaction = await buildTransaction({
+            sourceAccount,
+            operations: [
+              {
+                type: "changeTrust",
+                params: {
+                  assetCode: trustline.assetCode,
+                  assetIssuer: trustline.assetIssuer,
+                  limit: "0",
+                },
+              },
+            ],
+            network,
+          });
+
+          const rollbackResult = await signAndSubmitTransaction(
+            rollbackTransaction,
+            secretKey,
+            network
+          );
+
+          status.rollbackResult = rollbackResult;
+          return status;
+        } catch (error) {
+          status.rollbackError = (error as Error).message;
+          return status;
+        }
+      },
+      concurrency,
+      onProgress
+    );
+  }
+}
+
+export const bulkOperationManager = new BulkOperationManager();