cryptoexchange

README

Crypto-Exchange

Crypto-Exchange is a decentralized cryptocurrency exchange (DEX) built using modern technologies. It utilizes Golang for backend services, Solidity for smart contracts, and JavaScript for tooling. The project leverages cutting-edge blockchain developer tools, such as OpenZeppelin, Hardhat, and Ganache, to create a secure and scalable decentralized exchange platform.

Deployement Example

status	0x1 Transaction mined and execution succeed
transaction hash	0x0dff50888b1e55e22bf392d24240cc3f24257e322a56750e1b71071f91dade0d
block hash	0x92b396eaf1475db16f2fd63d9b4fe6f48d3a1f9f9f25a3db00b40ce99d494778
block number	12
contract address	0xDA0bab807633f07f013f94DD0E6A4F96F8742B53
from	0x5B38Da6a701c568545dCfcB03FcB875f56beddC4
to	ExchangeTest.(constructor)
gas	4460803 gas
transaction cost	3878959 gas 
execution cost	3556743 gas 
input	0x608...a0033
output	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decoded input	{}
decoded output	 - 
logs	[]
raw logs	[]

Documentation

Index

• Variables
• func ValidateCode(code string) error
• func ValidateDate(date string) error
• func ValidateSymbols(symbols []string) error
• func ValidateTimeFrame(TimeFrame [2]string) error
• type Exchange
  • func New(base string) *Exchange
  • func (exchange *Exchange) ConvertAt(date string, target string, amount int) (*big.Float, error)
  • func (exchange *Exchange) ConvertTo(target string, amount int) (*big.Float, error)
  • func (exchange *Exchange) CryptoCodes() ([]string, error)
  • func (exchange *Exchange) CryptoData() (map[string]map[string]string, error)
  • func (exchange *Exchange) FluctuationAll(start string, end string) (map[string]map[string]*big.Float, error)
  • func (exchange *Exchange) FluctuationMultiple(start string, end string, symbols []string) (map[string]map[string]*big.Float, error)
  • func (exchange *Exchange) FluctuationSingle(start string, end string, symbol string) (map[string]*big.Float, error)
  • func (exchange *Exchange) ForexCodes() ([]string, error)
  • func (exchange *Exchange) ForexData() (map[string]map[string]string, error)
  • func (exchange *Exchange) HistoricalRatesAll(date string) (map[string]*big.Float, error)
  • func (exchange *Exchange) HistoricalRatesMultiple(date string, symbols []string) (map[string]*big.Float, error)
  • func (exchange *Exchange) HistoricalRatesSingle(date string, symbol string) (*big.Float, error)
  • func (exchange *Exchange) LatestRatesAll() (map[string]*big.Float, error)
  • func (exchange *Exchange) LatestRatesMultiple(symbols []string) (map[string]*big.Float, error)
  • func (exchange *Exchange) LatestRatesSingle(symbol string) (*big.Float, error)
  • func (exchange *Exchange) SetBase(base string) error
  • func (exchange *Exchange) SetCache(cache bool)
  • func (exchange *Exchange) TimeseriesAll(start string, end string) (map[string]map[string]*big.Float, error)
  • func (exchange *Exchange) TimeseriesMultiple(start string, end string, symbols []string) (map[string]map[string]*big.Float, error)
  • func (exchange *Exchange) TimeseriesSingle(start string, end string, symbol string) (map[string]map[string]*big.Float, error)

Variables

var ErrInvalidAPIResponse = errors.New("Unknown API error")

ErrInvalidAPIResponse is returned when the API return success: false

var ErrInvalidCode = errors.New("Invalid currency code")

ErrInvalidCode is returned when the currency code is invalid

var ErrInvalidDate = errors.New("Oldest possible date is 1999-01-04")

ErrInvalidDate is returned when the date is too old

var ErrInvalidDateFormat = errors.New("Date format must be YYYY-MM-DD")

ErrInvalidDateFormat is returned when the date isn't formatted as YYYY-MM-DD

var ErrInvalidTimeFrame = errors.New("From date must be older than To date")

ErrInvalidTimeFrame is returned when the to date is older than to date. For example flipped the arguments

var ErrTimeframeExceeded = errors.New("Maximum allowed timeframe is 365 days")

ErrTimeframeExceeded is returned when the time between start_date and end_date is bigger than 365 days

Functions

func ValidateCode

func ValidateCode(code string) error

ValidateCode validates a single symbol code

func ValidateDate

func ValidateDate(date string) error

ValidateDate validates date string according to YYYY-MM-DD format and if it's

func ValidateSymbols

func ValidateSymbols(symbols []string) error

ValidateSymbols validates all symbols' codes in an array

func ValidateTimeFrame

func ValidateTimeFrame(TimeFrame [2]string) error

ValidateTimeFrame checks if the from and to date are not more than 365 days apart and they're not mixed

Types

type Exchange

type Exchange struct {
	Base         string
	CacheEnabled bool
	// contains filtered or unexported fields
}

Exchange is returned by New() and allows access to the methods

func New

func New(base string) *Exchange

New creates a new instance of Exchange

func (*Exchange) ConvertAt

func (exchange *Exchange) ConvertAt(date string, target string, amount int) (*big.Float, error)

ConvertAt converts the amount from the exchange.Base currency to the target currency at a selected historical date

func (*Exchange) ConvertTo

func (exchange *Exchange) ConvertTo(target string, amount int) (*big.Float, error)

ConvertTo converts the amount from the exchange.Base currency to the target currency

func (*Exchange) CryptoCodes

func (exchange *Exchange) CryptoCodes() ([]string, error)

CryptoCodes returns and array of supported cryptocurrency codes

func (*Exchange) CryptoData

func (exchange *Exchange) CryptoData() (map[string]map[string]string, error)

CryptoData returns a map of supported cryptocurrencies data (name and symbol)

func (*Exchange) FluctuationAll

func (exchange *Exchange) FluctuationAll(start string, end string) (map[string]map[string]*big.Float, error)

FluctuationAll returns the fluctuation for all supported symbols

func (*Exchange) FluctuationMultiple

func (exchange *Exchange) FluctuationMultiple(start string, end string, symbols []string) (map[string]map[string]*big.Float, error)

FluctuationMultiple returns the fluctuation for multiple symbols

func (*Exchange) FluctuationSingle

func (exchange *Exchange) FluctuationSingle(start string, end string, symbol string) (map[string]*big.Float, error)

FluctuationSingle returns the fluctuation for a single symbol

func (*Exchange) ForexCodes

func (exchange *Exchange) ForexCodes() ([]string, error)

ForexCodes returns and array of supported forex/fiat currency codes

func (*Exchange) ForexData

func (exchange *Exchange) ForexData() (map[string]map[string]string, error)

ForexData returns a map of supported forex/fiat currencies data (code & description)

func (*Exchange) HistoricalRatesAll

func (exchange *Exchange) HistoricalRatesAll(date string) (map[string]*big.Float, error)

HistoricalRatesAll returns the historical exchange rates for all supported currencies

func (*Exchange) HistoricalRatesMultiple

func (exchange *Exchange) HistoricalRatesMultiple(date string, symbols []string) (map[string]*big.Float, error)

HistoricalRatesMultiple returns the historical exchange rates for multiple currencies

func (*Exchange) HistoricalRatesSingle

func (exchange *Exchange) HistoricalRatesSingle(date string, symbol string) (*big.Float, error)

HistoricalRatesSingle returns the historical exchange rates for a single currency

func (*Exchange) LatestRatesAll

func (exchange *Exchange) LatestRatesAll() (map[string]*big.Float, error)

LatestRatesAll returns the latest exchange rates for all supportedcurrencies

func (*Exchange) LatestRatesMultiple

func (exchange *Exchange) LatestRatesMultiple(symbols []string) (map[string]*big.Float, error)

LatestRatesMultiple returns the latest exchange rates for multiple currencies

func (*Exchange) LatestRatesSingle

func (exchange *Exchange) LatestRatesSingle(symbol string) (*big.Float, error)

LatestRatesSingle returns the latest exchange rates for a single currencies

func (*Exchange) SetBase

func (exchange *Exchange) SetBase(base string) error

SetBase sets a new base currency for the exchange rates

func (*Exchange) SetCache

func (exchange *Exchange) SetCache(cache bool)

SetCache enables and disable caching (caching last till midnight when the exchange rates are updated)

func (*Exchange) TimeseriesAll

func (exchange *Exchange) TimeseriesAll(start string, end string) (map[string]map[string]*big.Float, error)

TimeseriesAll returns the timeseries for all supported symbols

func (*Exchange) TimeseriesMultiple

func (exchange *Exchange) TimeseriesMultiple(start string, end string, symbols []string) (map[string]map[string]*big.Float, error)

TimeseriesMultiple returns the timeseries for multiple symbols

func (*Exchange) TimeseriesSingle

func (exchange *Exchange) TimeseriesSingle(start string, end string, symbol string) (map[string]map[string]*big.Float, error)

TimeseriesSingle returns the timeseries for a single symbol<