tx · EAFn41YHcdH9ZciASRWoGSGcETaejUiRe4v8ArGTEtvb

3MvdzbvEZLHEE3EXHXxaRQjgpNqq28733ao:  -0.01000000 Waves

2021.12.24 12:05 [1848144] smart account 3MvdzbvEZLHEE3EXHXxaRQjgpNqq28733ao > SELF 0.00000000 Waves

{
    "type": 13,
    "id": "EAFn41YHcdH9ZciASRWoGSGcETaejUiRe4v8ArGTEtvb",
    "fee": 1000000,
    "feeAssetId": null,
    "timestamp": 1640336773257,
    "version": 1,
    "sender": "3MvdzbvEZLHEE3EXHXxaRQjgpNqq28733ao",
    "senderPublicKey": "HQmnkZjA2Ehwb2iKXAadqRsrXsHGZChU6WfgmHRsMW8t",
    "proofs": [
        "3iaCg3rcmo4vuKfgfbUpx6S7F3owFHWoxKdyAfTaaM3dLuFG2RG9fzihfxors3aA28zqc4KR8LPqdKyJcYqAWwW1"
    ],
    "script": "base64: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",
    "chainId": 84,
    "height": 1848144,
    "applicationStatus": "succeeded",
    "spentComplexity": 0
}

View: original | compacted
Prev: FoSZnYRKBgsHP6hELgLV7b2NtYV84nbUBa3siPcpkXaS
Next: none

Diff: 
Old
New
Differences
1
1
 
{-# STDLIB_VERSION 5 #-}
2
2
 
{-# SCRIPT_TYPE ACCOUNT #-}
3
3
 
{-# CONTENT_TYPE DAPP #-}
4
-
let collector = valueOrErrorMessage(addressFromString(valueOrErrorMessage(getString(this, "collector"), "")), "")
4
+
func getStringOrThrow (address,key) = valueOrErrorMessage(getString(address, key), ((("Can't read '" + key) + "' at address ") + toString(address)))
5
5
 
6
-
let oracle = valueOrErrorMessage(addressFromString(valueOrErrorMessage(getString(this, "oracle"), "")), "")
7
6
 
8
-
let pools = split(valueOrErrorMessage(getString(oracle, "pools"), ""), ",")
7
+
func parseAddressOrThrow (maybeAddress) = valueOrErrorMessage(addressFromString(maybeAddress), (("Can't parse address from '" + maybeAddress) + "'"))
8
+
9
+
10
+
func parseIntOrThrow (maybeInt) = valueOrErrorMessage(parseInt(maybeInt), (("Can't parse integer from '" + maybeInt) + "'"))
11
+
12
+
13
+
let collector = parseAddressOrThrow(getStringOrThrow(this, "collector"))
14
+
15
+
let oracle = parseAddressOrThrow(getStringOrThrow(this, "oracle"))
16
+
17
+
let pools = split(getStringOrThrow(oracle, "pools"), ",")
9
18
 
10
19
 
func getAssetId (asset) = if ((asset == "WAVES"))
11
20
 
    then unit
28
37
 
func deductFlatFee (amount) = fraction(amount, 1, 10000)
29
38
 
30
39
 
31
-
func doSwap (pool,payment,assetReceived,minReceived,estReceived) = {
32
-
    let poolAddress = valueOrErrorMessage(addressFromString(pool), "")
40
+
func doSwap (pool,payment,assetReceived,minAmountToReceive,estAmountToReceive) = {
41
+
    let poolAddress = parseAddressOrThrow(pool)
33
42
 
    let assetReceivedId = getAssetId(assetReceived)
34
-
    if ((0 >= minReceived))
35
-
        then throw("")
36
-
        else if ((0 > estReceived))
37
-
            then throw("")
38
-
            else {
39
-
                let balanceBefore = getBalance(assetReceivedId)
40
-
                if ((balanceBefore == balanceBefore))
41
-
                    then if (!(containsElement(pools, pool)))
42
-
                        then throw("")
43
-
                        else {
44
-
                            let poolAssetA = valueOrErrorMessage(getString(poolAddress, "A_asset_id"), "")
45
-
                            let poolAssetB = valueOrErrorMessage(getString(poolAddress, "B_asset_id"), "")
46
-
                            let poolAssetIdA = getAssetId(poolAssetA)
47
-
                            let poolAssetIdB = getAssetId(poolAssetB)
48
-
                            let versionMajor = valueOrErrorMessage(parseInt(split(valueOrErrorMessage(getString(poolAddress, "version"), ""), ".")[0]), "")
49
-
                            let args = if ((versionMajor == 1))
50
-
                                then [(minReceived + deductFee(minReceived))]
51
-
                                else if ((versionMajor == 2))
52
-
                                    then if ((0 >= estReceived))
53
-
                                        then throw("")
54
-
                                        else [(estReceived + deductFlatFee(estReceived)), (minReceived + deductFee(minReceived))]
55
-
                                    else throw("")
43
+
    if ((0 >= minAmountToReceive))
44
+
        then throw("minAmountToReceive must be positive")
45
+
        else if ((0 > estAmountToReceive))
46
+
            then throw("estAmountToReceive must be positive")
47
+
            else if (!(containsElement(pools, pool)))
48
+
                then throw((("There is no pool at address '" + pool) + "'"))
49
+
                else {
50
+
                    let versionMajor = parseIntOrThrow(split(getStringOrThrow(poolAddress, "version"), ".")[0])
51
+
                    let args = if ((versionMajor == 1))
52
+
                        then [(minAmountToReceive + deductFee(minAmountToReceive))]
53
+
                        else if ((versionMajor == 2))
54
+
                            then if ((0 >= estAmountToReceive))
55
+
                                then throw("estAmountToReceive must be positive")
56
+
                                else [(estAmountToReceive + deductFlatFee(estAmountToReceive)), (minAmountToReceive + deductFee(minAmountToReceive))]
57
+
                            else throw("")
58
+
                    let balanceBefore = getBalance(assetReceivedId)
59
+
                    if ((balanceBefore == balanceBefore))
60
+
                        then {
56
61
 
                            let result = invoke(poolAddress, "exchange", args, [payment])
57
62
 
                            if ((result == result))
58
63
 
                                then {
63
68
 
                                                then deductFee(received)
64
69
 
                                                else if ((versionMajor == 2))
65
70
 
                                                    then deductFlatFee(received)
66
-
                                                    else throw("")
71
+
                                                    else throw((("Unknown pool version '" + toString(versionMajor)) + "', but 1 or 2 expected"))
67
72
 
                                            if ((0 >= received))
68
-
                                                then throw("")
73
+
                                                then throw("Received amount from pool must be positive")
69
74
 
                                                else $Tuple3(balanceBefore, received, fee)
70
75
 
                                            }
71
76
 
                                        else throw("Strict value is not equal to itself.")
72
77
 
                                    }
73
78
 
                                else throw("Strict value is not equal to itself.")
74
79
 
                            }
75
-
                    else throw("Strict value is not equal to itself.")
76
-
                }
80
+
                        else throw("Strict value is not equal to itself.")
81
+
                    }
77
82
 
    }
78
83
 
79
84
 
80
85
 
@Callable(inv)
81
-
func swap (pool,assetToReceive,minReceived,estReceived) = {
86
+
func swap (pool,assetToReceive,minAmountToReceive,estAmountToReceive) = {
82
87
 
    let pmt = if ((size(inv.payments) > 0))
83
88
 
        then inv.payments[0]
84
-
        else throw("")
89
+
        else throw("Payment required")
85
90
 
    let assetReceivedId = getAssetId(assetToReceive)
86
-
    if ((0 >= minReceived))
87
-
        then throw("")
91
+
    if ((0 >= minAmountToReceive))
92
+
        then throw("minAmountToReceive must be positive")
88
93
 
        else {
89
-
            let $t028593084 =             match doSwap(pool, pmt, assetToReceive, minReceived, estReceived) {
94
+
            let $t032633526 =             match doSwap(pool, pmt, assetToReceive, minAmountToReceive, estAmountToReceive) {
90
95
 
                case _ => 
91
96
 
                    if (if (if ($isInstanceOf($match0._1, "Int"))
92
97
 
                        then if ($isInstanceOf($match0._2, "Int"))
101
106
 
                            let fee = $match0._3
102
107
 
                            $Tuple3(before, income, fee)
103
108
 
                            }
104
-
                        else throw("")
109
+
                        else throw("Can't handle swap result")
105
110
 
            }
106
-
            let balanceBefore = $t028593084._1
107
-
            let received = $t028593084._2
108
-
            let fee = $t028593084._3
111
+
            let balanceBefore = $t032633526._1
112
+
            let received = $t032633526._2
113
+
            let fee = $t032633526._3
109
114
 
[ScriptTransfer(inv.caller, (received - fee), assetReceivedId), ScriptTransfer(collector, fee, assetReceivedId)]
110
115
 
            }
111
116
 
    }
Full: 
Old
New
Differences
1
1
 
{-# STDLIB_VERSION 5 #-}
2
2
 
{-# SCRIPT_TYPE ACCOUNT #-}
3
3
 
{-# CONTENT_TYPE DAPP #-}
4
-
let collector = valueOrErrorMessage(addressFromString(valueOrErrorMessage(getString(this, "collector"), "")), "")
4
+
func getStringOrThrow (address,key) = valueOrErrorMessage(getString(address, key), ((("Can't read '" + key) + "' at address ") + toString(address)))
5
5
 
6
-
let oracle = valueOrErrorMessage(addressFromString(valueOrErrorMessage(getString(this, "oracle"), "")), "")
7
6
 
8
-
let pools = split(valueOrErrorMessage(getString(oracle, "pools"), ""), ",")
7
+
func parseAddressOrThrow (maybeAddress) = valueOrErrorMessage(addressFromString(maybeAddress), (("Can't parse address from '" + maybeAddress) + "'"))
8
+
9
+
10
+
func parseIntOrThrow (maybeInt) = valueOrErrorMessage(parseInt(maybeInt), (("Can't parse integer from '" + maybeInt) + "'"))
11
+
12
+
13
+
let collector = parseAddressOrThrow(getStringOrThrow(this, "collector"))
14
+
15
+
let oracle = parseAddressOrThrow(getStringOrThrow(this, "oracle"))
16
+
17
+
let pools = split(getStringOrThrow(oracle, "pools"), ",")
9
18
 
10
19
 
func getAssetId (asset) = if ((asset == "WAVES"))
11
20
 
    then unit
12
21
 
    else fromBase58String(asset)
13
22
 
14
23
 
15
24
 
func getBalance (assetId) = match assetId {
16
25
 
    case asset: ByteVector => 
17
26
 
        assetBalance(this, asset)
18
27
 
    case waves: Unit => 
19
28
 
        wavesBalance(this).available
20
29
 
    case _ => 
21
30
 
        throw("Match error")
22
31
 
}
23
32
 
24
33
 
25
34
 
func deductFee (amount) = fraction(amount, 1, 1000)
26
35
 
27
36
 
28
37
 
func deductFlatFee (amount) = fraction(amount, 1, 10000)
29
38
 
30
39
 
31
-
func doSwap (pool,payment,assetReceived,minReceived,estReceived) = {
32
-
    let poolAddress = valueOrErrorMessage(addressFromString(pool), "")
40
+
func doSwap (pool,payment,assetReceived,minAmountToReceive,estAmountToReceive) = {
41
+
    let poolAddress = parseAddressOrThrow(pool)
33
42
 
    let assetReceivedId = getAssetId(assetReceived)
34
-
    if ((0 >= minReceived))
35
-
        then throw("")
36
-
        else if ((0 > estReceived))
37
-
            then throw("")
38
-
            else {
39
-
                let balanceBefore = getBalance(assetReceivedId)
40
-
                if ((balanceBefore == balanceBefore))
41
-
                    then if (!(containsElement(pools, pool)))
42
-
                        then throw("")
43
-
                        else {
44
-
                            let poolAssetA = valueOrErrorMessage(getString(poolAddress, "A_asset_id"), "")
45
-
                            let poolAssetB = valueOrErrorMessage(getString(poolAddress, "B_asset_id"), "")
46
-
                            let poolAssetIdA = getAssetId(poolAssetA)
47
-
                            let poolAssetIdB = getAssetId(poolAssetB)
48
-
                            let versionMajor = valueOrErrorMessage(parseInt(split(valueOrErrorMessage(getString(poolAddress, "version"), ""), ".")[0]), "")
49
-
                            let args = if ((versionMajor == 1))
50
-
                                then [(minReceived + deductFee(minReceived))]
51
-
                                else if ((versionMajor == 2))
52
-
                                    then if ((0 >= estReceived))
53
-
                                        then throw("")
54
-
                                        else [(estReceived + deductFlatFee(estReceived)), (minReceived + deductFee(minReceived))]
55
-
                                    else throw("")
43
+
    if ((0 >= minAmountToReceive))
44
+
        then throw("minAmountToReceive must be positive")
45
+
        else if ((0 > estAmountToReceive))
46
+
            then throw("estAmountToReceive must be positive")
47
+
            else if (!(containsElement(pools, pool)))
48
+
                then throw((("There is no pool at address '" + pool) + "'"))
49
+
                else {
50
+
                    let versionMajor = parseIntOrThrow(split(getStringOrThrow(poolAddress, "version"), ".")[0])
51
+
                    let args = if ((versionMajor == 1))
52
+
                        then [(minAmountToReceive + deductFee(minAmountToReceive))]
53
+
                        else if ((versionMajor == 2))
54
+
                            then if ((0 >= estAmountToReceive))
55
+
                                then throw("estAmountToReceive must be positive")
56
+
                                else [(estAmountToReceive + deductFlatFee(estAmountToReceive)), (minAmountToReceive + deductFee(minAmountToReceive))]
57
+
                            else throw("")
58
+
                    let balanceBefore = getBalance(assetReceivedId)
59
+
                    if ((balanceBefore == balanceBefore))
60
+
                        then {
56
61
 
                            let result = invoke(poolAddress, "exchange", args, [payment])
57
62
 
                            if ((result == result))
58
63
 
                                then {
59
64
 
                                    let received = (getBalance(assetReceivedId) - balanceBefore)
60
65
 
                                    if ((received == received))
61
66
 
                                        then {
62
67
 
                                            let fee = if ((versionMajor == 1))
63
68
 
                                                then deductFee(received)
64
69
 
                                                else if ((versionMajor == 2))
65
70
 
                                                    then deductFlatFee(received)
66
-
                                                    else throw("")
71
+
                                                    else throw((("Unknown pool version '" + toString(versionMajor)) + "', but 1 or 2 expected"))
67
72
 
                                            if ((0 >= received))
68
-
                                                then throw("")
73
+
                                                then throw("Received amount from pool must be positive")
69
74
 
                                                else $Tuple3(balanceBefore, received, fee)
70
75
 
                                            }
71
76
 
                                        else throw("Strict value is not equal to itself.")
72
77
 
                                    }
73
78
 
                                else throw("Strict value is not equal to itself.")
74
79
 
                            }
75
-
                    else throw("Strict value is not equal to itself.")
76
-
                }
80
+
                        else throw("Strict value is not equal to itself.")
81
+
                    }
77
82
 
    }
78
83
 
79
84
 
80
85
 
@Callable(inv)
81
-
func swap (pool,assetToReceive,minReceived,estReceived) = {
86
+
func swap (pool,assetToReceive,minAmountToReceive,estAmountToReceive) = {
82
87
 
    let pmt = if ((size(inv.payments) > 0))
83
88
 
        then inv.payments[0]
84
-
        else throw("")
89
+
        else throw("Payment required")
85
90
 
    let assetReceivedId = getAssetId(assetToReceive)
86
-
    if ((0 >= minReceived))
87
-
        then throw("")
91
+
    if ((0 >= minAmountToReceive))
92
+
        then throw("minAmountToReceive must be positive")
88
93
 
        else {
89
-
            let $t028593084 =             match doSwap(pool, pmt, assetToReceive, minReceived, estReceived) {
94
+
            let $t032633526 =             match doSwap(pool, pmt, assetToReceive, minAmountToReceive, estAmountToReceive) {
90
95
 
                case _ => 
91
96
 
                    if (if (if ($isInstanceOf($match0._1, "Int"))
92
97
 
                        then if ($isInstanceOf($match0._2, "Int"))
93
98
 
                            then $isInstanceOf($match0._3, "Int")
94
99
 
                            else false
95
100
 
                        else false)
96
101
 
                        then $isInstanceOf($match0, "(Int, Int, Int)")
97
102
 
                        else false)
98
103
 
                        then {
99
104
 
                            let before = $match0._1
100
105
 
                            let income = $match0._2
101
106
 
                            let fee = $match0._3
102
107
 
                            $Tuple3(before, income, fee)
103
108
 
                            }
104
-
                        else throw("")
109
+
                        else throw("Can't handle swap result")
105
110
 
            }
106
-
            let balanceBefore = $t028593084._1
107
-
            let received = $t028593084._2
108
-
            let fee = $t028593084._3
111
+
            let balanceBefore = $t032633526._1
112
+
            let received = $t032633526._2
113
+
            let fee = $t032633526._3
109
114
 
[ScriptTransfer(inv.caller, (received - fee), assetReceivedId), ScriptTransfer(collector, fee, assetReceivedId)]
110
115
 
            }
111
116
 
    }
112
117
 
113
118
 

github/deemru/w8io/3ef1775 
224.77 ms ◑