Implement 0x client & 0x utils
Ensure you installed dep for dependency management.
make dep #install dependency
Set contracts info into ./models/config.go
// Config for kovan
var (
KovanConfig = Config{
EthRPC: "https://kovan.infura.io",
Erc20ProxyContractAddress: common.HexToAddress("0x9ad1b8209cea603892c9dfaa676bc737088b499a"),
Erc721ProxyContractAddress: common.HexToAddress("0xbb428f7108971ecf1144700c4d37792f8b74f6b0"),
ExchangeContractAddress: common.HexToAddress("0xa458ec0709468996ef2ef668f5e52f37ceb66627"),
WethAddress: KovanTokens["WETH"].Address,
}
// token list
KovanTokens = map[string]Token{
"WETH": Token{
Symbol: "WETH",
Address: common.HexToAddress("0xd0a1e359811322d97991e03f863a0c30c2cf029c"),
Decimals: 18,
Type: "ERC20",
},
"ZRX": Token{
Symbol: "ZRX",
Address: common.HexToAddress("0x6ff6c0ff1d68b964901f986d4c9fa3ac68346570"),
Decimals: 18,
Type: "ERC20",
}
}
)
Before fillOrder, you should approve token's transferFrom to Erc20ProxyContractAddress.
// init client from your private key
prv := "set your prv key here"
client := New(prv, &models.KovanConfig)
// get nonce
nonce, _ := makerClient.Nonce()
// approve
txHash, _ := client.Approve(models.KovanTokens["WETH"].Address, models.KovanConfig.Erc20ProxyContractAddress, big.NewInt(100000), nonce)
fmt.Println("txHash:", txHash.String())
// new maker & taker Client
makerPrv := "set your prv key here"
takerPrv := "set your prv key here"
makerClient := New(makerPrv, &models.KovanConfig)
takerClient := New(takerPrv, &models.KovanConfig)
// maker: new order
order, err := makerClient.NewOrder(models.KovanTokens["WETH"], models.KovanTokens["CZT"], new(big.Int).SetUint64(1234567*1e9), new(big.Int).SetUint64(1e18))
require.NoError(t, err)
fmt.Println(order)
// maker: sign order
signature, err := makerClient.SignOrder(order, utils.SIGNTYPE_EthSign)
require.NoError(t, err)
fmt.Println(common.Bytes2Hex(signature))
// taker: fillorder
nonce, err := takerClient.Nonce()
gasPrice := new(big.Int).SetUint64(13*1e9)
require.NoError(t, err)
txHash, err := takerClient.FillOrder(order, new(big.Int).SetUint64(1e18), signature, gasPrice, nonce)
require.NoError(t, err)
fmt.Println("txHash:", txHash.String())