# Splits

> Onchain financial infrastructure for builders. A full-stack financial operations platform -- built on open source payment contracts that run for free, forever.

- Website: https://splits.org
- Treasury (modern banking for startups): https://splits.org/treasury
- Personal (a wallet purpose-built for builders): https://splits.org/personal
- Treasury and Personal docs: https://docs.splits.org
- Protocol explorer: https://app.splits.org
- GitHub: https://github.com/0xSplits

## Treasury & Personal: Permissionless financial ops for startups & builders

**Treasury** at splits.org/treasury: modern banking for established startups. Crosschain, multi-signature accounts with professional workflows for treasury management, automated rebalancing, accounting, invoicing, and bank transfers.

**Personal** at splits.org/personal: a wallet purpose-built for solo builders. Self-custodial, with programmable recovery, subaccounts, and fiat on/offramps.

### Networks

- full-support: Ethereum, Base, Optimism, Arbitrum, Celo, World Chain
  - Capabilities: native smart accounts (ERC-4337), full treasury management, all platform features
- partial-support: 70+ EVM networks via relay.link (https://relay.link)
  - Capabilities: send assets to these networks, bridge funds back; no native smart account on chain

### Repos

#### splits-contracts-monorepo
- Purpose: Crosschain, multi-signature accounts (ERC-4337, passkey support)
- Language: Solidity 0.8.23
- Note: Smart accounts are in the same monorepo as the open source contracts.

#### splits-connect
- Purpose: Browser extension for Splits
- Language: TypeScript

## Protocol — Open source contracts & tools

Public good payment primitives. Audited, zero fees, deployed on 13+ chains, $250M+ distributed.

- Split: Distribute funds to recipients by percentage. Supports pull (gas-efficient) and push (direct) modes.
- Waterfall: Sequential payments -- priority tranches filled in order.
- Swapper: Automatic token conversion on receipt.

### Repos

#### splits-contracts-monorepo
- Purpose: v2 Split contracts + smart accounts (ERC-4337)
- Language: Solidity 0.8.23
- Build: Foundry + Turborepo + pnpm
- Key files: AGENTS.md, CLAUDE.md, packages/splits-v2/, packages/smart-vaults/
- Docs: packages/splits-v2/docs/contracts.md, packages/splits-v2/docs/integration-patterns.md
- Note: Primary contracts repo. Contains splits-v2 and smart-vaults packages.

#### splits-contracts
- Purpose: v1 core splitting contracts (SplitMain)
- Language: Solidity
- Note: Legacy. v2 in splits-contracts-monorepo is the active version.

#### splits-waterfall
- Purpose: Waterfall payment contracts (sequential distribution)
- Language: Solidity
- Build: Foundry

#### splits-swapper
- Purpose: Swapper contracts (automatic token conversion)
- Language: Solidity
- Build: Foundry

#### splits-sdk
- Purpose: JS/TS SDK and React hooks for interacting with Splits contracts
- Language: TypeScript
- Build: pnpm workspaces
- Packages: @0xsplits/splits-sdk, @0xsplits/splits-sdk-react

#### docs
- Purpose: Documentation site (docs.splits.org)
- Language: TypeScript
- URL: https://docs.splits.org

## Architecture Notes

- SplitsWarehouse (ERC6909) is the central token accounting layer in v2.
- Token IDs in warehouse = uint256(uint160(tokenAddress)).
- Split recipients must be sorted by address (ascending).
- Native ETH is wrapped as WETH internally by the warehouse.
- Smart accounts use ERC-4337 v0.7 EntryPoint (0x0000000071727De22E5E9d8BAf0edAc6f37da032).

## Agent Entry Points

- Org-level: https://github.com/0xSplits/.github/blob/main/AGENTS.md
- Contracts: https://github.com/0xSplits/splits-contracts-monorepo/blob/main/AGENTS.md
- Contracts (Claude-specific): https://github.com/0xSplits/splits-contracts-monorepo/blob/main/CLAUDE.md