Documentation Index
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Voltaire home page

GitHub
Get Started
Get Started

Documentation
GitHub
Twitter

Overview

What is Voltaire?
Safe Ethereum
Runtime Implementations
Agentic Coding
Multiplatform
Powerful Features

Getting Started

Getting Started
Playground
Library Comparisons
Performance Benchmarks
Model Context Protocol (MCP)

Core Concepts

Branded Types
Schema Annotations
Type-Safe Ethereum Values
Data-First API
Tree-Shakeable API
Error Handling
Cross-Language Consistency
Skills
Advanced Build
External Dependencies

Skills

Skills

JSONRPCProvider

JSONRPCProvider
Getting Started
Usage Patterns
Comparison

Contract

Contract Pattern
Read Methods
Write Methods
Events
Gas Estimation

Primitives

Hash (Moved to Keccak256)

Cryptography

EVM

Ethereum Virtual Machine (EVM)
EVM Types
Frame
Host

Utils

Utils
Retry with Exponential Backoff
Rate Limiting
Polling
Timeout
Batch Processing

Guides

Rate Limiting with Effect.ts
Provider Fallback with ExecutionPlan

Examples

Swift

Swift
Getting Started (Swift)
Xcode Integration (Swift)

Zig

Developer Documentation

Developer Documentation

Generated API (TypeDoc)

Generated API Reference
utils
native
GasCosts
HDWallet
Proxy
Ssz
Storage
TransactionUrl

See Also

Uint.plus

Add two Uint256 values with wrapping overflow

Try it Live

Run Uint examples in the interactive playground

Addition wraps on overflow: (a + b) mod 2^256Matches Solidity and EVM behavior.

See Also

minus - Subtraction
Arithmetic operations - Full arithmetic reference

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