What’s new in v2.0

Note

This page describes v2.0. v2.1 has since shipped, adding LiveProvider for Uniswap V2 and V3, Multicall3 batching, PoolSnapshot enrichment, the LiveProvider.get_w3() escape hatch, PoolHealth ergonomics for V3, and a fork-and-evaluate worked example. The canonical v2.1 release notes live at defipy.org and the v2.1.0 GitHub release.

From desktop tool to industrial infrastructure. v1 was built for the research analyst — a library you imported into a notebook to answer questions about a pool. v2 is built for the agentic era — the same primitives now ship as MCP tools, callable by autonomous systems at production scale. The math didn’t change. The surface around it did.

Agentic Primitives — the v2 foundation

The 21 stateless, typed analytics primitives are the core of v2 — all present since v1.2.0, now exposed as MCP tools without coupling DeFiPy to any specific LLM framework. The library itself remains pure analytics: zero LLM dependencies, zero network calls at core. Each primitive follows a three-line contract — stateless construction, computation at .apply(), typed dataclass return — making them callable identically from a notebook or from an LLM via MCP. They cover 9 categories of DeFi analytics:

  • Position Analysis — decompose LP positions into IL, fee income, net PnL across V2, V3, Balancer, and Stableswap

  • Price Scenarios — project position value at hypothetical price changes

  • Pool Health — snapshot pool-level metrics: TVL, LP concentration, fee activity, rug signals

  • Risk — V3 tick-range status, stableswap depeg exposure

  • Optimization — optimal deposit splits, rebalance evaluation, tick-range comparison

  • Comparison — fee-tier comparison, cross-protocol comparison

  • Execution — slippage calculation, MEV detection

  • Portfolio — aggregate multi-position portfolios with numeraire enforcement

  • Break-Even — find the price or holding period where fees compensate IL

10 of the 21 are curated as MCP tools for LLM consumption; all 21 are importable, documented, and tested. See the Agentic Primitives Overview for the full availability grid, primitive descriptions, and executable notebook examples for every category.

defipy.tools

Self-describing schemas for the 10 curated leaf primitives in Model Context Protocol (MCP) format. get_schemas("mcp") returns the schema list; TOOL_REGISTRY exposes the underlying ToolSpec entries for programmatic use. Anthropic tool-use and OpenAI function-calling formats are deferred to v2.1 — both are derivable from MCP schemas with small wrappers. See Tool Schemas (defipy.tools) for the full module reference.

defipy.twin

The State Twin abstraction. StateTwinProvider defines the snapshot(pool_id) → PoolSnapshot contract. MockProvider ships four canonical synthetic recipes (eth_dai_v2, eth_dai_v3, eth_dai_balancer_50_50, usdc_dai_stableswap_A10). LiveProvider ships as a stub with a stable constructor — functional implementation lands in v2.1. See State Twin Concept for the full treatment.

MCP server demo

A reference stdio-transport server at python/mcp/defipy_mcp_server.py exposes DeFiPy’s 10 curated tools to Claude Desktop, Claude Code, or any MCP client. Per-call receipts log as single-line JSON to stderr. See Binding to Claude for setup and MCP Server Demo Walkthrough for a verified-live walkthrough.

Test coverage

v2.0: 629 tests passing. 125 new tests added in v2.0 (52 for defipy.tools, 47 for defipy.twin, 3 packaging smoke tests, 23 MCP server dispatch tests).

As of v2.1: 686 passed, 11 skipped (the 11 skipped are opt-in live-RPC tests gated by the DEFIPY_LIVE_RPC env var).

Packaging fixes

setup.py fully enumerates all sub-packages. v1.2.0 was missing six primitive sub-packages (comparison, execution, optimization, pool_health, portfolio, risk) plus two analytics.* sub-packages — fresh PyPI installs of v1.2.0 were broken on import for several primitives. v2.0 fixes all of it and adds test_packaging.py as a continuous guard.

No breaking changes

All 21 primitives ship with identical behavior to v1.2.0. No breaking changes to primitive signatures, return dataclasses, or composition patterns. Core install (pip install defipy) remains dependency-free of chain libraries and LLM libraries. The [mcp] extra is the only new dependency surface.

What’s deferred to v2.1+

  • LiveProvider implementation — shipped in v2.1 for Uniswap V2 and V3. Balancer and Stableswap LiveProvider ship in v2.2.

  • defipy.observability module (stderr receipts are the v2.0 observability surface; structured event sink with opt-in tracing is v2.1)

  • Anthropic tool-use and OpenAI function-calling schema formats

  • Planning primitives category (PlanRebalance, PlanZapIn, PlanExit)

  • Balancer + Stableswap extensions to FindBreakEvenPrice, FindBreakEvenTime, CalculateSlippage

  • AssessLiquidityDepth (V3 tick-walking) and DiscoverPools

See Roadmap & Changelog for the full v2.1+ timeline.