package main

import (
    "fmt"
    "math/big"

    "github.com/ethereum/go-ethereum/common"
    "github.com/tempoxyz/tempo-go/pkg/client"
    "github.com/tempoxyz/tempo-go/pkg/signer"
    "github.com/tempoxyz/tempo-go/pkg/transaction"
)

func main() {
    // Create RPC client
    c, _ := client.New("https://rpc.testnet.tempo.xyz")

    s, _ := signer.NewSigner("0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80")

    recipient := common.HexToAddress("0x70997970C51812dc3A010C7d01b50e0d17dc79C8")
    amount := new(big.Int).Mul(big.NewInt(10), big.NewInt(1e18)) // 10 AlphaUSD (18 decimals)
    transferData := buildERC20TransferData(recipient, amount)

    tx := transaction.New()
    tx.ChainID = big.NewInt(42429) // Tempo testnet
    tx.MaxFeePerGas = big.NewInt(2000000000)
    tx.MaxPriorityFeePerGas = big.NewInt(1000000000)
    tx.Gas = 100000
    tx.Calls = []transaction.Call{{
        To:    &transaction.AlphaUSDAddress,
        Value: big.NewInt(0),
        Data:  transferData,
    }}

    transaction.SignTransaction(tx, s)
    hash, _ := c.SendTransaction(tx)
    fmt.Printf("Transaction hash: %s\n", hash.Hex())
}

// buildERC20TransferData creates calldata for ERC20 transfer(address,uint256)
func buildERC20TransferData(to common.Address, amount *big.Int) []byte {
    // transfer(address,uint256) selector: 0xa9059cbb
    data := make([]byte, 68)
    data[0], data[1], data[2], data[3] = 0xa9, 0x05, 0x9c, 0xbb
    copy(data[16:36], to.Bytes())              // address (32 bytes, left-padded)
    amount.FillBytes(data[36:68])              // uint256 (32 bytes)
    return data
}

tx := transaction.NewDefault(42429)
tx.MaxFeePerGas = big.NewInt(2000000000)
tx.MaxPriorityFeePerGas = big.NewInt(1000000000)
tx.Gas = 100000
tx.Calls = []transaction.Call{{
    To:    &transaction.AlphaUSDAddress,
    Value: big.NewInt(0),
    Data:  transferData, // ERC20 transfer calldata
}}

transaction.SignTransaction(tx, signer)

client.SendTransaction(tx)

tx := transaction.NewDefault(42429)
transaction.SignTransaction(tx, userSigner)

transaction.AddFeePayerSignature(tx, feePayerSigner)

client.SendTransaction(tx)

tx := transaction.NewDefault(42429) // Tempo testnet
tx.Gas = 150000
tx.Calls = []transaction.Call{
    {To: &addr1, Value: big.NewInt(0), Data: transfer1Data},
    {To: &addr2, Value: big.NewInt(0), Data: transfer2Data},
    {To: &addr3, Value: big.NewInt(0), Data: contractCallData},
}

transaction.SignTransaction(tx, signer)
client.SendTransaction(tx)

tx := transaction.NewDefault(42429) // Tempo testnet
tx.ValidAfter = uint64(time.Now().Unix())
tx.ValidBefore = uint64(time.Now().Add(1 * time.Hour).Unix())

transaction.SignTransaction(tx, signer)
client.SendTransaction(tx)