1package common
 2
 3import (
 4	"encoding/binary"
 5	"math/big"
 6	"time"
 7
 8	ethCommon "github.com/ethereum/go-ethereum/common"
 9)
10
11// Token is a struct that represents an Ethereum token that is supported in Hermez network
12type Token struct {
13	TokenID     TokenID
14	EthAddr     ethCommon.Address
15	Name        string
16	Symbol      string
17	Decimals    uint64
18	EthTxHash   ethCommon.Hash // Ethereum TxHash in which this token was registered
19	EthBlockNum uint64         // Ethereum block number in which this token was registered
20}
21
22// TokenInfo provides the price of the token in USD
23type TokenInfo struct {
24	TokenID     uint32
25	Value       float64
26	LastUpdated time.Time
27}
28
29// TokenID is the unique identifier of the token, as set in the smart contract
30type TokenID uint32 // current implementation supports up to 2^32 tokens
31
32// Bytes returns a byte array of length 4 representing the TokenID
33func (t TokenID) Bytes() []byte {
34	var tokenIDBytes [4]byte
35	binary.LittleEndian.PutUint32(tokenIDBytes[:], uint32(t))
36	return tokenIDBytes[:]
37}
38
39// BigInt returns the *big.Int representation of the TokenID
40func (t TokenID) BigInt() *big.Int {
41	return big.NewInt(int64(t))
42}