MiniSwapSettlement

A minimal fixed-vs-floating interest rate swap settlement contract demonstrating oracle risk and settlement mechanics.

Quick Start

# Install Foundry
curl -L https://foundry.paradigm.xyz | bash
foundryup

# Install dependencies
forge install

# Run tests
forge test -v

Structure

• src/MiniSwapSettlement.sol - Core swap settlement contract
• src/MockRateOracle.sol - Mock oracle for testing
• test/MiniSwapSettlement.t.sol - Test suite covering normal cases and edge cases
• TECHNICAL_README.md - 300-word edge case analysis

Key Features

• Fixed vs floating interest rate swap payoff calculation
• Oracle freshness checks (1-hour threshold)
• Settlement only at maturity
• Protection against stale oracle data

Test Coverage

1. Normal Settlement: Tests both floating-higher and floating-lower scenarios
2. Stale Oracle Edge Case: Reverts if oracle data is >1 hour old
3. Rate Spike Edge Case: Demonstrates manipulation vulnerability at settlement

Kairos Context

This minimal implementation demonstrates understanding of:

• Fixed/floating swap mechanics
• Oracle dependency risks
• Settlement timing vulnerabilities
• Protocol-level risk mitigation