/
contract.go
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/
contract.go
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// Copyright 2020 The Penguin Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package chequebook
import (
"context"
"encoding/hex"
"encoding/json"
"errors"
"github.com/penguintop/penguin/pkg/xwcfmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/penguintop/penguin/pkg/transaction"
)
type chequebookContract struct {
address common.Address
transactionService transaction.Service
}
func newChequebookContract(address common.Address, transactionService transaction.Service) *chequebookContract {
return &chequebookContract{
address: address,
transactionService: transactionService,
}
}
func (c *chequebookContract) Issuer(ctx context.Context) (common.Address, error) {
//callData, err := chequebookABI.Pack("issuer")
//if err != nil {
// return common.Address{}, err
//}
type CallData struct {
CallApi string `json:"CallApi"`
CallArgs string `json:"CallArgs"`
}
var callData CallData
callData.CallApi = "issuer"
callData.CallArgs = ""
callDataBytes, err := json.Marshal(callData)
if err != nil {
return common.Address{}, err
}
output, err := c.transactionService.Call(ctx, &transaction.TxRequest{
To: &c.address,
Data: callDataBytes,
})
if err != nil {
return common.Address{}, err
}
issuerAddrHex, _ := xwcfmt.XwcAddrToHexAddr(string(output))
issuerAddrBytes, _ := hex.DecodeString(issuerAddrHex)
var addr common.Address
addr.SetBytes(issuerAddrBytes)
return addr, nil
}
// Balance returns the token balance of the chequebook.
func (c *chequebookContract) Balance(ctx context.Context) (*big.Int, error) {
//callData, err := chequebookABI.Pack("balance")
//if err != nil {
// return nil, err
//}
type CallData struct {
CallApi string `json:"CallApi"`
CallArgs string `json:"CallArgs"`
}
var callData CallData
callData.CallApi = "balance"
callData.CallArgs = ""
callDataBytes, err := json.Marshal(callData)
if err != nil {
return nil, err
}
output, err := c.transactionService.Call(ctx, &transaction.TxRequest{
To: &c.address,
Data: callDataBytes,
})
if err != nil {
return nil, err
}
balance, ok := big.NewInt(0).SetString(string(output), 10)
if !ok {
return nil, errors.New("invalid balance value")
}
return balance, nil
}
func (c *chequebookContract) PaidOut(ctx context.Context, address common.Address) (*big.Int, error) {
//callData, err := chequebookABI.Pack("paidOut", address)
//if err != nil {
// return nil, err
//}
type CallData struct {
CallApi string `json:"CallApi"`
CallArgs string `json:"CallArgs"`
}
var callData CallData
callData.CallApi = "paidOut"
callData.CallArgs, _ = xwcfmt.HexAddrToXwcAddr(hex.EncodeToString(address[:]))
callDataBytes, err := json.Marshal(callData)
if err != nil {
return nil, err
}
output, err := c.transactionService.Call(ctx, &transaction.TxRequest{
To: &c.address,
Data: callDataBytes,
})
if err != nil {
return nil, err
}
paidOut, ok := big.NewInt(0).SetString(string(output), 10)
if !ok {
return nil, errors.New("invalid paidOut value")
}
return paidOut, nil
}
func (c *chequebookContract) TotalPaidOut(ctx context.Context) (*big.Int, error) {
//callData, err := chequebookABI.Pack("totalPaidOut")
//if err != nil {
// return nil, err
//}
type CallData struct {
CallApi string `json:"CallApi"`
CallArgs string `json:"CallArgs"`
}
var callData CallData
callData.CallApi = "totalPaidOut"
callData.CallArgs = ""
callDataBytes, err := json.Marshal(callData)
if err != nil {
return nil, err
}
output, err := c.transactionService.Call(ctx, &transaction.TxRequest{
To: &c.address,
Data: callDataBytes,
})
if err != nil {
return nil, err
}
totalPaidOut, ok := big.NewInt(0).SetString(string(output), 10)
if !ok {
return nil, errors.New("invalid totalPaidOut value")
}
return totalPaidOut, nil
}