[149] Cross-Contract Invocation Transaction Bundle Executor with Atomic Revert

[ayomideadeniran]

Description

Multi-call transaction bundler that allows dApps and users to bundle multiple complex interactions (e.g. approve token -> deposit -> borrow -> swap -> stake) into a single atomic transaction.

Location

contracts/bundle-executor/src/lib.rs:

// contracts/bundle-executor/src/lib.rs
pub fn execute_batch_bundle(env: Env, calls: Vec<ContractCall>) -> Vec<Bytes> {
  // Executes sequence of contract invocations; reverts everything if any call fails
}

Impact

Reduces user transaction signing overhead from 5 prompts to 1, while eliminating partial execution failure risk.

Required Fix

• Parse dynamic ContractCall arguments and target contract addresses.
• Execute calls sequentially and collect return values.
• Enforce atomic rollback on any internal revert.

Reference

Identified during full codebase production readiness audit of soroban-playground.