multiversx-vault-pattern

Implement an in-memory token ledger using ManagedMapEncoded and ManagedVec for MultiversX transactions.

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

Core Features & Use Cases

  • In-Memory Ledger: Uses ManagedMapEncoded and ManagedVec for efficient O(1) balance lookups and ordered iteration.
  • Flexible Withdrawals: Supports exact amount, percentage, and full balance withdrawals.
  • Use Case: Ideal for smart contracts performing sequential token operations like aggregators, batch processors, or atomic swaps where intermediate balances don't need to persist across transactions.

Quick Start

Use the multiversx-vault-pattern skill to implement an in-memory token ledger for tracking balances during multi-step token operations within a single transaction.

Frequently Asked Questions about multiversx-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 high gas costs?

Use an in-memory token ledger pattern to track intermediate balances during multi-step operations within a single transaction. This avoids expensive storage writes for temporary state by keeping balances in memory only until final settlement.

What's the best way to handle batch token operations and atomic swaps on MultiversX efficiently?

An in-memory token ledger pattern is ideal for batch processors and atomic swaps on the MultiversX blockchain. It uses ManagedMapEncoded for O(1) lookups and ManagedVec for ordered settlement, ensuring efficient state management for sequential operations.

Why does my MultiversX smart contract consume excessive gas during multi-step token transactions?

Your smart contract likely consumes excessive gas by writing intermediate token balances to persistent storage. To optimize gas, implement an in-memory ledger that tracks temporary balances during multi-step transactions and avoids unnecessary storage writes.

Can I withdraw partial or full intermediate balances from an in-memory ledger in a MultiversX transaction?

Yes, an in-memory ledger supports flexible withdrawals for intermediate balances. Within a single MultiversX transaction, you can withdraw exact amounts, percentages, or full balances from the in-memory token ledger before final settlement.

When should I use an in-memory token ledger instead of persistent storage in MultiversX smart contracts?

Use an in-memory token ledger when tracking intermediate balances that do not need to persist across transactions. It is specifically designed for aggregators and atomic swaps where temporary state is settled and discarded within a single transaction.

How does an in-memory token ledger achieve O(1) lookups for transaction processing on MultiversX?

The in-memory token ledger achieves O(1) lookups during transaction processing by utilizing ManagedMapEncoded for balance tracking. Combined with ManagedVec for ordered settlement, it efficiently manages temporary state without persistent storage writes.