utils

Documentation

Index

• Constants
• Variables
• func Abs(x int64) int64
• func BigFloatToHumanNumberString(f *big.Float, decimals int) string
• func BigIntToHumanNumberString(i *big.Int, decimals int) string
• func ColorPrintf(color string, format string, a ...interface{})
• func DateToTime(dayString string, hour int, min int, sec int) (time.Time, error)
• func EstimateTargetBlocknumber(utcTimestamp int64) int64
• func FindBlockRange(client *ethclient.Client, blockHeight int, date string, hour int, min int, ...) (startBlock int64, endBlock int64, err error)
• func GetBlocks(blockChan chan<- *types.Block, client *ethclient.Client, startBlock int64, ...)
• func GetErc20TokensInUnit(numTokens *big.Int, addrDetail addressdetail.AddressDetail) (amount *big.Float, symbol string)
• func GetFirstBlockHeaderAtOrAfterTime(client *ethclient.Client, targetTime time.Time) (header *types.Header, err error)
• func GetTxSender(tx *types.Transaction) (from common.Address, err error)
• func IsBigIntZero(n *big.Int) bool
• func NumberToHumanReadableString(value interface{}, decimals int) string
• func Perror(err error)
• func PrintBlock(block *types.Block)
• func WeiBigIntToEthString(wei *big.Int, decimals int) string
• func WeiToEth(wei *big.Int) (ethValue *big.Float)
• func WeiUintToEth(wei uint64) (ethValue float64)

Constants

const (
	InfoColor    = "\033[1;34m%s\033[0m"
	NoticeColor  = "\033[1;36m%s\033[0m"
	WarningColor = "\033[1;33m%s\033[0m"
	ErrorColor   = "\033[1;31m%s\033[0m"
	DebugColor   = "\033[0;36m%s\033[0m"
)

Variables

var DebugEnabled bool = os.Getenv("DEBUG") != ""

var (
	ErrTargetTimestampAfterLatestBlock = errors.New("target timestamp after latest block")
)

Functions

func Abs

func Abs(x int64) int64

func BigFloatToHumanNumberString

func BigFloatToHumanNumberString(f *big.Float, decimals int) string

func BigIntToHumanNumberString

func BigIntToHumanNumberString(i *big.Int, decimals int) string

func ColorPrintf

func ColorPrintf(color string, format string, a ...interface{})

func DateToTime

func DateToTime(dayString string, hour int, min int, sec int) (time.Time, error)

func EstimateTargetBlocknumber

func EstimateTargetBlocknumber(utcTimestamp int64) int64

Roughly estimate a block number by target timestamp (might be off by a lot)

func FindBlockRange

func FindBlockRange(client *ethclient.Client, blockHeight int, date string, hour int, min int, length string) (startBlock int64, endBlock int64, err error)

GetBlockRangeFromArguments returns start and end blocks for a given block or date range. startBlock is first block at or after the given time, endBlock is the last before the given end time.

func GetBlocks

func GetBlocks(blockChan chan<- *types.Block, client *ethclient.Client, startBlock int64, endBlock int64, concurrency int)

GetBlocks is a fast block query pipeline. It queries blocks concurrently and pushes it into a channel for processing.

func GetErc20TokensInUnit

func GetErc20TokensInUnit(numTokens *big.Int, addrDetail addressdetail.AddressDetail) (amount *big.Float, symbol string)

func GetFirstBlockHeaderAtOrAfterTime

func GetFirstBlockHeaderAtOrAfterTime(client *ethclient.Client, targetTime time.Time) (header *types.Header, err error)

GetBlockHeaderAtTimestamp returns the header of the first block at or after the timestamp. If timestamp is after latest block, then return latest block. This function is a bit messy, but works. Improvements to this approach are welcome.

func GetTxSender

func GetTxSender(tx *types.Transaction) (from common.Address, err error)

func IsBigIntZero

func IsBigIntZero(n *big.Int) bool

func NumberToHumanReadableString

func NumberToHumanReadableString(value interface{}, decimals int) string

func Perror

func Perror(err error)

func PrintBlock

func PrintBlock(block *types.Block)

func WeiBigIntToEthString

func WeiBigIntToEthString(wei *big.Int, decimals int) string

// Returns bigint wei amount as comma-separated, human-readable string (eg. 1,435,332.71)

func WeiToEth

func WeiToEth(wei *big.Int) (ethValue *big.Float)

func WeiUintToEth

func WeiUintToEth(wei uint64) (ethValue float64)