generated from ubiquity/ts-template
-
Notifications
You must be signed in to change notification settings - Fork 6
/
encode-decode.ts
107 lines (105 loc) · 3.23 KB
/
encode-decode.ts
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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
import { PermitReward, TokenType } from "../types";
import { RewardPermit } from "./permit-type";
/**
* Returns a base64 encoded string containing all the permit data
*/
export function encodePermits(permits: PermitReward[]) {
const permitsDto = permits
.map((permit) => {
if (permit.tokenType === TokenType.ERC20) {
return {
type: "erc20-permit",
permit: {
permitted: {
token: permit.tokenAddress,
amount: permit.amount,
},
nonce: permit.nonce,
deadline: permit.deadline,
},
transferDetails: {
to: permit.beneficiary,
requestedAmount: permit.amount,
},
owner: permit.owner,
signature: permit.signature,
networkId: permit.networkId,
};
} else {
if (permit.erc721Request) {
return {
type: "erc721-permit",
permit: {
permitted: {
token: permit.tokenAddress,
amount: permit.amount,
},
nonce: permit.nonce,
deadline: permit.deadline,
},
transferDetails: {
to: permit.beneficiary,
requestedAmount: permit.amount,
},
owner: permit.owner,
signature: permit.signature,
networkId: permit.networkId,
nftMetadata: permit.erc721Request.metadata,
request: {
beneficiary: permit.beneficiary,
deadline: permit.deadline,
keys: permit.erc721Request?.keys,
nonce: permit.nonce,
values: permit.erc721Request?.values,
},
};
} else {
return null;
}
}
})
.filter((o) => o) as RewardPermit[];
return Buffer.from(JSON.stringify(permitsDto)).toString("base64");
}
export function decodePermits(base64: string) {
const decoded = atob(base64);
const objs: Array<RewardPermit> = JSON.parse(decoded);
const result: PermitReward[] = [];
for (const obj of objs) {
const tokenType = obj.type === "erc20-permit" ? TokenType.ERC20 : TokenType.ERC721;
if (tokenType === TokenType.ERC721) {
result.push({
amount: obj.permit.permitted.amount as "0" | "1",
beneficiary: obj.transferDetails.to,
deadline: obj.permit.deadline,
networkId: obj.networkId,
nonce: obj.permit.nonce,
owner: obj.owner,
signature: obj.signature,
tokenAddress: obj.permit.permitted.token,
tokenType,
...(obj.type === "erc721-permit" &&
obj.nftMetadata && {
erc721Request: {
metadata: obj.nftMetadata,
keys: obj.request?.keys ?? [],
values: obj.request?.values ?? [],
},
}),
});
} else {
result.push({
amount: obj.permit.permitted.amount,
beneficiary: obj.transferDetails.to,
deadline: obj.permit.deadline,
networkId: obj.networkId,
nonce: obj.permit.nonce,
owner: obj.owner,
signature: obj.signature,
tokenAddress: obj.permit.permitted.token,
tokenType,
});
}
}
return result;
}