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.