platypus-finance/platypus-finance-utils

platypus-finance/platypus-finance-utils is a library developed by for platypus finance.

Installation

To install and set up the library, run:

$ npm install @platypus-finance/platypus-finance-utils

Or if you prefer using Yarn:

$ yarn add @platypus-finance/platypus-finance-utils

API Reference

.solveForDeltaX

Regarding Section 6 of our AMM yellow paper, the FROM amount, aka, delta x (denoted delta j in the paper) in our Newton's method can be obtained from the following solveForDeltaX function, when the TO amount is given.

Params

• assetX {BigNumber} asset of token X in WAD. (e.g, use ethers.js's parseEther('1.5') for 1.5 USDC)
• assetY {BigNumber} asset of token Y in WAD
• liabilityX {BigNumber} liability of token X in WAD
• liabilityY {BigNumber} liability of token Y in WAD
• fy {BigNumber} USD price of token X in WAD. (Can use 1 WAD for both fy and fx since our protocol current only supports stablepairs)
• fx {BigNumber} USD price of token Y in WAD. (Can use 1 WAD for both fy and fx since our protocol current only supports stablepairs)
• toAmount {BigNumber} specified TO amount of token Y in WAD
• haircutRate {BigNumber} haircut rate in WAD. Can be obtained from pool's contract's getHaircutRate
• slippageParamK {BigNumber} in WAD. Can be obtained from pool's contract's getSlippageParamK
• slippageParamN {BigNumber} in BigNumber Int. Can be obtained from pool's contract's getSlippageParamN
• slippageParamC1 {BigNumber} in WAD. Can be obtained from pool's contract's getC1
• slippageParamXThreshold {BigNumber} in WAD. Can be obtained from pool's contract's getXThreshold
• returns {BigNumber} FROM amount, Delta X, in WAD