mvx_vault_pattern

Manage in-memory token balances for multi-step transactional operations using ManagedMapEncoded and ManagedVec.

12|5|Updated Jan 28, 2026
One-click install
npx skills add https://github.com/multiversx/mx-ai-skills --skill mvx-vault-pattern
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mvx_vault_pattern
Source: https://github.com/multiversx/mx-ai-skills/tree/main/antigravity/skills/mvx_vault_pattern
Command: npx skills add https://github.com/multiversx/mx-ai-skills --skill mvx-vault-pattern

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill addresses the challenge of tracking intermediate token balances during multi-step operations within a single transaction, without requiring costly storage writes.

Core Features & Use Cases

  • In-Memory Ledger: Efficiently manages token balances in memory for complex transactional flows.
  • Dual Data Structure: Utilizes ManagedMapEncoded for fast lookups and ManagedVec for ordered iteration.
  • Use Case: Ideal for implementing atomic swaps or batch token operations where intermediate states need to be tracked accurately before final settlement.

Quick Start

Use the mvx_vault_pattern skill to deposit 100 tokens of type 'MYTOKEN' into the ledger.

Frequently Asked Questions about mvx_vault_pattern

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I track intermediate token balances in a MultiversX smart contract without storage writes?

You can track intermediate token balances in a MultiversX smart contract without storage writes by using an in-memory ledger. This approach manages temporary balances for multi-step transactional operations entirely in memory to avoid costly persistent storage interactions.

What is the best way to handle multi-step transactional token swaps in Rust smart contracts?

Handling multi-step transactional token swaps in Rust smart contracts is best done with an in-memory token ledger. This pattern tracks intermediate balances for atomic operations before final settlement without requiring persistent storage writes.

How does an in-memory token ledger work for batch processing in MultiversX?

An in-memory token ledger for batch processing in MultiversX works by using a dual data structure. It combines ManagedMapEncoded for O(1) fast balance lookups and ManagedVec for ordered iteration, ensuring efficient temporary ledgering during complex transactions.

When do I need temporary ledgering for intermediate balances in Rust smart contracts?

You need temporary ledgering for intermediate balances in Rust smart contracts when executing complex transactional flows like atomic swaps or batch token operations. It accurately tracks intermediate states within a single transaction before final settlement without permanent storage.

Does the in-memory vault pattern support ordered iteration and fast lookups simultaneously?

Yes, the in-memory vault pattern supports ordered iteration and fast lookups simultaneously. It utilizes a combination of ManagedMapEncoded for O(1) lookups and ManagedVec for ordered iteration, satisfying the need for efficient temporary ledgering.

Why use an in-memory token ledger instead of persistent storage for intermediate balance tracking?

Use an in-memory token ledger instead of persistent storage for intermediate balance tracking to avoid costly storage writes. It efficiently manages temporary balances for multi-step transactional operations within a single transaction before final settlement.