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           `meddler:"token_id"`
14	EthBlockNum int64             `meddler:"eth_block_num"` // Ethereum block number in which this token was registered
15	EthAddr     ethCommon.Address `meddler:"eth_addr"`
16	Name        string            `meddler:"name"`
17	Symbol      string            `meddler:"symbol"`
18	Decimals    uint64            `meddler:"decimals"`
19	USD         float32           `meddler:"usd,zeroisnull"`
20	USDUpdate   time.Time         `meddler:"usd_update,utctimez"`
21}
22
23// TokenInfo provides the price of the token in USD
24type TokenInfo struct {
25	TokenID     uint32
26	Value       float64
27	LastUpdated time.Time
28}
29
30// TokenID is the unique identifier of the token, as set in the smart contract
31type TokenID uint32 // current implementation supports up to 2^32 tokens
32
33// Bytes returns a byte array of length 4 representing the TokenID
34func (t TokenID) Bytes() []byte {
35	var tokenIDBytes [4]byte
36	binary.LittleEndian.PutUint32(tokenIDBytes[:], uint32(t))
37	return tokenIDBytes[:]
38}
39
40// BigInt returns the *big.Int representation of the TokenID
41func (t TokenID) BigInt() *big.Int {
42	return big.NewInt(int64(t))
43}