/
tokenallowance.go
81 lines (67 loc) · 2.91 KB
/
tokenallowance.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
// Copyright © 2017-2019 Weald Technology Trading
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"fmt"
"math/big"
"os"
"github.com/spf13/cobra"
"github.com/engram-network/gramreal/v2/cli"
"github.com/engram-network/gramreal/v2/util"
)
var (
tokenAllowanceRaw bool
tokenAllowanceHolderAddress string
tokenAllowanceSpenderAddress string
)
// tokenAllowanceCmd represents the token allowance command.
var tokenAllowanceCmd = &cobra.Command{
Use: "allowance",
Short: "Obtain the token allowance for a holder and spender",
Long: `Obtain the token allowance for a holder and spender. For example:
gramreal token allowance --token=omg --holder=0x5FfC014343cd971B7eb70732021E26C35B744cc4 --spender=0x52f1A3027d3aA514F17E454C93ae1F79b3B12d5d
In quiet mode this will return 0 if the allowance is greater than 0, otherwise 1.`,
Run: func(cmd *cobra.Command, args []string) {
cli.Assert(tokenAllowanceHolderAddress != "", quiet, "--holder is required")
holderAddress, err := c.Resolve(tokenAllowanceHolderAddress)
cli.ErrCheck(err, quiet, fmt.Sprintf("Failed to resolve holder address %s", tokenAllowanceHolderAddress))
cli.Assert(tokenAllowanceSpenderAddress != "", quiet, "--spender is required")
spenderAddress, err := c.Resolve(tokenAllowanceSpenderAddress)
cli.ErrCheck(err, quiet, "Failed to obtain spender address")
cli.Assert(tokenStr != "", quiet, "--token is required")
token, err := tokenContract(tokenStr)
cli.ErrCheck(err, quiet, "Failed to obtain token contract")
decimals, err := token.Decimals(nil)
cli.ErrCheck(err, quiet, "Failed to obtain token decimals")
allowance, err := token.Allowance(nil, holderAddress, spenderAddress)
cli.ErrCheck(err, quiet, "Failed to obtain allowance")
if quiet {
if allowance.Cmp(big.NewInt(0)) == 0 {
os.Exit(exitFailure)
}
os.Exit(exitSuccess)
}
if tokenAllowanceRaw {
fmt.Printf("%s\n", allowance.String())
} else {
fmt.Printf("%s\n", util.TokenValueToString(allowance, decimals, false))
}
},
}
func init() {
tokenCmd.AddCommand(tokenAllowanceCmd)
tokenFlags(tokenAllowanceCmd)
tokenAllowanceCmd.Flags().BoolVar(&tokenAllowanceRaw, "raw", false, "Display raw output (no decimals)")
tokenAllowanceCmd.Flags().StringVar(&tokenAllowanceHolderAddress, "holder", "", "Address that holds tokens")
tokenAllowanceCmd.Flags().StringVar(&tokenAllowanceSpenderAddress, "spender", "", "Address that can spend tokens")
}