path: root/ui/filter.go

package ui

import (
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/ethutil"
)

func fromHex(s string) []byte {
    if len(s) > 1 {
        if s[0:2] == "0x" {
            s = s[2:]
        }
        return ethutil.Hex2Bytes(s)
    }
    return nil
}

func NewFilterFromMap(object map[string]interface{}, eth core.Backend) *core.Filter {
    filter := core.NewFilter(eth)

    if object["earliest"] != nil {
        val := ethutil.NewValue(object["earliest"])
        filter.SetEarliestBlock(val.Int())
    }

    if object["latest"] != nil {
        val := ethutil.NewValue(object["latest"])
        filter.SetLatestBlock(val.Int())
    }

    if object["address"] != nil {
        //val := ethutil.NewValue(object["address"])
        //filter.SetAddress(fromHex(val.Str()))
    }

    if object["max"] != nil {
        val := ethutil.NewValue(object["max"])
        filter.SetMax(int(val.Uint()))
    }

    if object["skip"] != nil {
        val := ethutil.NewValue(object["skip"])
        filter.SetSkip(int(val.Uint()))
    }

    if object["topics"] != nil {
        filter.SetTopics(MakeTopics(object["topics"]))
    }

    return filter
}

// Conversion methodn
func mapToAccountChange(m map[string]interface{}) (d core.AccountChange) {
    if str, ok := m["id"].(string); ok {
        d.Address = fromHex(str)
    }

    if str, ok := m["at"].(string); ok {
        d.StateAddress = fromHex(str)
    }

    return
}

// data can come in in the following formats:
// ["aabbccdd", {id: "ccddee", at: "11223344"}], "aabbcc", {id: "ccddee", at: "1122"}
func MakeTopics(v interface{}) (d [][]byte) {
    if str, ok := v.(string); ok {
        d = append(d, fromHex(str))
    } else if slice, ok := v.([]string); ok {
        for _, item := range slice {
            d = append(d, fromHex(item))
        }
    }
    return
}