dexsdk

package module
v0.1.3 Latest Latest
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 Go to latest Published: Oct 9, 2022 License: GPL-3.0 Imports: 17 Imported by: 0

README

dex-sdk

Go Reference

A dex(Decentralized Exchange) that supports the uniswap v2 contract variant

  • BSC(Pancake Swap V2)
  • ETH(Uniswap V2)

Installation

go version >= 1.18 Latest version

go get github.com/Jonescy/dex-sdk

Or Special version

go get github.com/Jonescy/dex-sdk@<version tag>

Usage

More example see examples/

Contribution

Please make sure your contributions adhere to our coding guidelines:

  • Code must adhere to the official Go formatting guidelines (i.e. uses gofmt).
  • Code must be documented adhering to the official Go commentary guidelines.
  • Pull requests need to be based on and opened against the master branch.
  • Commit messages should be prefixed with the operation and package(s) they modify.
    • E.g. "fix(examples/fetchPrice), del: make trace configs optional"

All issues and PR these welcome to contribute it, thanks.

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	InsufficientAmountError = errors.New("insufficient amount")
	TokenExistError         = errors.New("pair not this token")
)

InsufficientAmountError errors

View Source 
var BigFive = decimal.NewFromInt(5)
View Source 
var BigOne = decimal.NewFromInt(1)
View Source 
var BigTen = decimal.NewFromInt(10)
View Source 
var BigZero = decimal.NewFromInt(0)
View Source 
var FactoryAddressMap = map[ChainId]string{
	BscMain: "0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73",
	BscTest: "0x6725f303b657a9451d8ba641348b6761a6cc7a17",
	EthMain: "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f",
}
View Source 
var FeesDenominator = decimal.NewFromInt(10000)
View Source 
var FeesNumerator = decimal.NewFromInt(9975)
View Source 
var InitCodeHash = map[ChainId]string{
	BscMain: "0x00fb7f630766e6a796048ea87d01acd3068e8ff67d078148a3fa3f4a84f69bd5",
	BscTest: "0xd0d4c4cd0848c93cb4fd1f498d7013ee6bfb25783ea21593d5834f5d250ece66",
	EthMain: "0x96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f",
}
View Source 
var MinimumLiquidity = decimal.NewFromInt(1000)
View Source 
var PairAddressCache = map[string]common.Address{}

PairAddressCache cache already query pair

Functions

func FormatEther 

func FormatEther(wei decimal.Decimal) string

func GetAddress 

func GetAddress(tokenA, tokenB Token) common.Address

GetAddress get Pair address can without Pair Constructor

func NewCaller added in v0.1.3 

func NewCaller(link string) (*ethclient.Client, error)

func ParseEther 

func ParseEther(i interface{}) decimal.Decimal

Types

type ChainId 

type ChainId int64

ChainId Public Blockchain Known Identify 

const (
	EthMain ChainId = 1  // ethereum mainnet
	Ropsten ChainId = 3  // ethereum Ropsten testnet
	Rinkeby ChainId = 4  // ethereum Rinkeby testnet
	Goerli  ChainId = 5  // ethereum Goerli testnet
	Kovan   ChainId = 42 // ethereum Kovan testnet

	BscMain ChainId = 56 // bsc mainnet
	BscTest ChainId = 97 // bsc testnet

	OkcMain ChainId = 66 // okc mainnet
	OkcTest ChainId = 65 // okc testnet

	HecoMain ChainId = 128 // heco mainnet
	HecoTest ChainId = 256 // heco testnet

	PolygonMain ChainId = 137   // polygon mainnet
	Mumbai      ChainId = 80001 // polygon mumbai testnet

	Ganache ChainId = 8545 // local testnet
)

func (ChainId) Explorer 

func (chain ChainId) Explorer() string

Explorer of the chain id

func (ChainId) IsTestnet 

func (chain ChainId) IsTestnet() bool

IsTestnet ...

func (ChainId) String 

func (chain ChainId) String() string

String Name of the Chain id

func (ChainId) Symbol 

func (chain ChainId) Symbol() string

Symbol of the chain id

type Desc 

type Desc struct {
	Name   string `json:"name" yaml:"name"`     // obj name
	Symbol string `json:"symbol" yaml:"symbol"` // obj symbol
}

Desc Blockchain Object Description

type Fetcher 

type Fetcher struct {
	ChainId ChainId
	// contains filtered or unexported fields
}

func NewFetcher 

func NewFetcher(b bind.ContractBackend, chainId ChainId) Fetcher

func (Fetcher) GetKLast added in v0.1.3 

func (f Fetcher) GetKLast(address common.Address) (*big.Int, error)

func (Fetcher) GetReverses 

func (f Fetcher) GetReverses(token0, token1 Token) (Pair, error)

GetReverses currently support bsc

func (Fetcher) GetTokenInfo added in v0.1.3 

func (f Fetcher) GetTokenInfo(address common.Address) (Token, error)

func (Fetcher) GetTotalSupply added in v0.1.3 

func (f Fetcher) GetTotalSupply(address common.Address) (*big.Int, error)

type Pair 

type Pair struct {
	LiquidityToken Token
	TokenAmounts   [2]TokenAmount
}

Pair trading pair

func NewPair 

func NewPair(token0, token1 TokenAmount) Pair

NewPair Pair Constructor

func (Pair) GetInputAmount 

func (p Pair) GetInputAmount(outputAmount TokenAmount) (TokenAmount, Pair, error)

GetInputAmount provide output amount calc input amount

func (Pair) GetLiquidityAmount added in v0.1.3 

func (p Pair) GetLiquidityAmount(token Token, totalSupply *big.Int, liquidity TokenAmount, feeOn bool, kLast *big.Int) (TokenAmount, error)

GetLiquidityAmount get liquidity amount

func (Pair) GetLiquidityMinted 

func (p Pair) GetLiquidityMinted(totalSupply, tokenAmountA, tokenAmountB TokenAmount) (TokenAmount, error)

GetLiquidityMinted calc lp has been minted

func (Pair) GetOutputAmount 

func (p Pair) GetOutputAmount(inputAmount TokenAmount) (TokenAmount, Pair, error)

GetOutputAmount provide input amount calc output amount

func (Pair) Reverse0 

func (p Pair) Reverse0() TokenAmount

func (Pair) Reverse1 

func (p Pair) Reverse1() TokenAmount

func (Pair) ReverseOf 

func (p Pair) ReverseOf(token Token) TokenAmount

func (Pair) String 

func (p Pair) String() string

func (Pair) Token0 

func (p Pair) Token0() Token

func (Pair) Token1 

func (p Pair) Token1() Token

type Token 

type Token struct {
	Desc
	Decimals int8    `json:"decimals" yaml:"decimals"` // token decimals
	Address  string  `json:"address" yaml:"address"`   // token address
	ChainId  ChainId `json:"chainId" yaml:"chainId"`   // token chain id enum
}

Token Represents an ERC20 token with a unique address and some metadata.

func NewToken 

func NewToken(address string, decimals int8, chainId ChainId, desc ...string) Token

NewToken Token Constructor

func (Token) Equals 

func (t Token) Equals(other Token) bool

Equals judgment condition is unique address

func (Token) SortsBefore 

func (t Token) SortsBefore(other Token) bool

SortsBefore check is sort before new object

func (Token) ToAddress 

func (t Token) ToAddress() common.Address

ToAddress convert to ethereum common.Address

type TokenAmount 

type TokenAmount struct {
	Token
	Raw decimal.Decimal
}

func NewTokenAmount 

func NewTokenAmount(token Token, amount decimal.Decimal) TokenAmount

func (TokenAmount) Add 

func (ta TokenAmount) Add(other TokenAmount) TokenAmount

func (TokenAmount) Sub 

func (ta TokenAmount) Sub(other TokenAmount) TokenAmount

type Tokens 

type Tokens struct {
	List []Token
	// contains filtered or unexported fields
}

Tokens list of unique token

func NewTokenList 

func NewTokenList(list ...Token) Tokens

NewTokenList Tokens Constructor

func (Tokens) AppendAndSort 

func (list Tokens) AppendAndSort(tokens ...Token)

AppendAndSort Append new token to list

func (Tokens) IsExist 

func (list Tokens) IsExist(token Token) bool

IsExist check token is exist

func (*Tokens) Marshal 

func (list *Tokens) Marshal() ([]byte, error)

Marshal ...

func (Tokens) Sort 

func (list Tokens) Sort()

Sort ...

func (*Tokens) Unmarshal 

func (list *Tokens) Unmarshal(bs []byte) error

Unmarshal ...

Source Files

View all Source files

Directories

Path Synopsis
abi
erc20
pair-bsc
examples
fetchPrice

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