f84b375cde
* Minimal Uniswap accessor. * Add comments * Safe math * mainnet gas benchmark * Assembler Uniswap * Selectors and addresses * Fix bugs in ABI encoders * Typo * AsmUniswap test * Fix wantAmount computation * Golfing * Bypass AllowanceTarget * Generalized asm uniswapper * Implement ordering * Fix pair computation * #6 Golfing Iron * Remove 'to' argument (saves 377 gas) * New contract api * `@0x/contracts-zero-ex`: Add `UniswapFeature` * `@0x/contract-artifacts`: Regenerate artifacts * `@0x/contract-wrappers`: Regenerate wrappers * `@0x/asset-swapper`: Add Uniswap VIP support. `@0x/asset-swapper`: Add `includeSources` support. * `@0x/contracts-zero-ex`: Fix misleading comments in `UniswapFeature`. `@0x/asset-swapper`: Fix linter errors. * `@0x/asset-swapper`: Fix source filter bugs. * `@0x/contracts-zero-ex`: `UniswapFeature`: Reduce calldata size for AllowanceTarget call `@0x/asset-swapper`: Fix failing test. * `@0x/contracts-zero-ex`: Fix ETH buy tokens not being normalized to WETH. * `@0x/asset-swapper`: Fix multi-hop weirdness with source filters. * `@0x/asset-swapper`: Fix failing test. * `@0x/asset-swapper`: Really fix that broken AS test. * `@0x/asset-swapper`: use filter objects instead of source array for valid buy and sell sources/ * `@0x/asset-swapper`: Move some source filtering logic into the sampler operations. * `@0x/contracts-zero-ex`: Address PR feedback * `@0x/contracts-zero-ex`: Fix feature version bug. * `@0x/asset-swapper`: Did I actually fix AS tests this time? Who knows. Co-authored-by: Remco Bloemen <remco@0x.org> Co-authored-by: Michael Zhu <mchl.zhu.96@gmail.com> Co-authored-by: Lawrence Forman <me@merklejerk.com>
@0x/asset-swapper
Convenience package for swapping assets represented on the Ethereum blockchain using 0x. The package helps to perform all the off-chain computations to execute a marketBuy or marketSell function execution with 0x exchange contracts, or 0x extension contracts. Given some liquidity (0x signed orders), it helps estimate the cost of buying or selling a certain asset (giving a range) and then provide varying consumable outputs to execute the buy or sell.
Asset-swapper integrates with the Standard Relayer API(in the future Mesh as well) and takes care of sourcing liquidity, order-pruning, and order-validation. The final result is a library that tells you what assets are available, provides a quote based on specified assets, and provide varying consumable metadata that can be used both on-chain in smart contracts or off-chain through web3 to swap a desired amount of ERC20 for another ERC20 asset.
Installation
yarn add @0x/asset-swapper
Import
import { SwapQuoter } from '@0x/asset-swapper';
or
var SwapQuoter = require('@0x/asset-swapper').SwapQuoter;
var SwapQuoteConsumer = require('@0x/asset-swapper').SwapQuoteConsumer;
If your project is in TypeScript, add the following to your tsconfig.json:
"compilerOptions": {
"typeRoots": ["node_modules/@0x/typescript-typings/types", "node_modules/@types"],
}
Contributing
We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
Please read our contribution guidelines before getting started.
Install dependencies
If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
yarn config set workspaces-experimental true
Then install dependencies
yarn install
Build
To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
PKG=@0x/asset-swapper yarn build
Or continuously rebuild on change:
PKG=@0x/asset-swapper yarn watch
Clean
yarn clean
Lint
yarn lint
Run Tests
yarn test