Binance-Pegged Assets

1export const name = 'Binance-Pegged Assets';
2export const version = '0.0.4';
3export const license = 'MIT';
4
5const TOKEN_HUB = '0x0000000000000000000000000000000000001004'
6
7interface Token {
8  id: string
9  address: string
10  originChain: string
11  stablecoin?: boolean
12  coingeckoId?: string
13  decimals?: number
14}
15
16const tokens: Token[] = [
17  {
18    id: 'eth',
19    address: '0x2170ed0880ac9a755fd29b2688956bd959f933f8',
20    originChain: 'ethereum',
21    coingeckoId: 'ethereum',
22  },
23  {
24    id: 'btcb',
25    address: '0x7130d2a12b9bcbfae4f2634d864a1ee1ce3ead9c',
26    originChain: 'bitcoin',
27    coingeckoId: 'bitcoin',
28  },
29  {
30    id: 'usdc',
31    address: '0x8ac76a51cc950d9822d68b83fe1ad97b32cd580d',
32    originChain: 'ethereum',
33    stablecoin: true,
34  },
35  {
36    id: 'busd',
37    address: '0xe9e7cea3dedca5984780bafc599bd69add087d56',
38    originChain: 'ethereum',
39    stablecoin: true,
40  },
41  {
42    id: 'dai',
43    address: '0x1af3f329e8be154074d8769d1ffa4ee058b1dbc3',
44    originChain: 'ethereum',
45    stablecoin: true,
46  },
47  {
48    id: 'avax',
49    address: '0x1ce0c2827e2ef14d5c4f29a091d735a204794041',
50    originChain: 'avalanche',
51    coingeckoId: 'avalanche-2',
52  },
53  {
54    id: 'uni',
55    address: '0xbf5140a22578168fd562dccf235e5d43a02ce9b1',
56    originChain: 'ethereum',
57    coingeckoId: 'uniswap',
58  },
59  {
60    id: 'atom',
61    address: '0x0eb3a705fc54725037cc9e008bdede697f62f335',
62    originChain: 'cosmoshub',
63    coingeckoId: 'cosmos',
64  },
65  {
66    id: 'link',
67    address: '0xf8a0bf9cf54bb92f17374d9e9a321e6a111a51bd',
68    originChain: 'ethereum',
69    coingeckoId: 'chainlink',
70  },
71  {
72    id: 'near',
73    address: '0x1fa4a73a3f0133f0025378af00236f3abdee5d63',
74    originChain: 'near',
75    coingeckoId: 'near',
76  },
77  {
78    id: 'dot',
79    address: '0x7083609fCE4d1d8Dc0C979AAb8c869Ea2C873402',
80    originChain: 'polkadot',
81    coingeckoId: 'polkadot',
82  },
83  {
84    id: 'gmt',
85    address: '0x3019BF2a2eF8040C242C9a4c5c4BD4C81678b2A1',
86    originChain: 'solana',
87    coingeckoId: 'stepn',
88    decimals: 8,
89  },
90  {
91    id: 'uni',
92    address: '0xBf5140A22578168FD562DCcF235E5D43A02ce9B1',
93    originChain: 'ethereum',
94    coingeckoId: 'uniswap',
95  },
96];
97
98// Ethereum pegged:
99const bbtc: Token = {
100  id: 'bbtc',
101  address: '0x9be89d2a4cd102d8fecc6bf9da793be995c22541',
102  originChain: 'bitcoin',
103  coingeckoId: 'bitcoin',
104  decimals: 8,
105};
106// Insufficent value/liquidity to include
107// const dot: Token = {
108//   id: 'dot',
109//   address: '0x7884f51dc1410387371ce61747cb6264e1daee0b',
110//   originChain: 'polkadot',
111//   coingeckoId: 'polkadot',
112//   decimals: 10,
113// };
114
115export function setup(sdk: Context) {
116  const getBridgedValue = async (token: Token, chain = 'bsc') => {
117    const tokenContract = sdk.ethers.getERC20Contract(token.address, chain);
118    const [supply, tokenHub, price] = await Promise.all([
119      tokenContract.totalSupply(),
120      tokenContract.balanceOf(TOKEN_HUB),
121      token.stablecoin ? Promise.resolve(1) : sdk.coinGecko.getCurrentPrice(token.coingeckoId),
122    ]);
123
124    const circSupply = (supply - tokenHub) / (10 ** (token.decimals || 18));
125    return circSupply * price;
126  }
127
128  const getBridgedAssets = async (chain: string) => {
129    const value = await Promise.all(tokens
130      .filter(token => token.originChain === chain)
131      .map(token => getBridgedValue(token))
132    );
133    return value.reduce((a, b) => a + b, 0);
134  }
135
136  const chains = new Set();
137
138  sdk.registerBundle('binance-peg', {
139    name: 'Binance-Peg',
140    icon: sdk.ipfs.getDataURILoader('QmYCfAzYWvHf1NBQodQedqGhs3QRZxCs1QeA4saneyTJgu', 'image/svg+xml'),
141    category: 'custodial',
142    website: 'https://www.bnbchain.org/en/assets-proof',
143    description: 'Binance-Pegged Tokens are assets issued by Binance to represent assets held '
144      + 'in Binance\s reserve. These assets must be depositted into a Binance account in order'
145      + 'to redeem for the underlying asset.',
146  });
147
148  for (const token of tokens) {
149    const chain = token.originChain;
150    if (!chains.has(chain)) {
151      chains.add(chain);
152
153      sdk.register({
154        id: `binance-peg-assets-${token.originChain}`,
155        bundle: 'binance-peg',
156        queries: {
157          currentValueBridgedAToB: async () => 0,
158          currentValueBridgedBToA: () => getBridgedAssets(chain),
159        },
160        metadata: {
161          name: 'Binance Pegged Assets',
162          subtitle: chain,
163          icon: sdk.ipfs.getDataURILoader('QmYCfAzYWvHf1NBQodQedqGhs3QRZxCs1QeA4saneyTJgu', 'image/svg+xml'),
164
165          chainA: 'bsc',
166          chainB: chain,
167          category: 'custodial',
168        }
169      });
170    }
171  }
172
173  sdk.register({
174    id: 'binance-peg-assets-eth-bbtc',
175    bundle: 'binance-peg',
176    queries: {
177      currentValueBridgedAToB: async () => 0,
178      currentValueBridgedBToA: () => getBridgedValue(bbtc, 'ethereum'),
179    },
180    metadata: {
181      name: 'Binance Pegged Assets',
182      subtitle: 'Bitcoin-Ethereum',
183      icon: sdk.ipfs.getDataURILoader('QmYCfAzYWvHf1NBQodQedqGhs3QRZxCs1QeA4saneyTJgu', 'image/svg+xml'),
184
185      chainA: 'ethereum',
186      chainB: 'bitcoin',
187      category: 'custodial',
188    },
189  });
190
191  // sdk.register({
192  //   id: 'binance-peg-assets-eth-dot',
193  //   bundle: 'binance-peg',
194  //   queries: {
195  //     currentValueBridgedAToB: async () => 0,
196  //     currentValueBridgedBToA: () => getBridgedValue(dot, 'ethereum'),
197  //   },
198  //   metadata: {
199  //     name: 'Binance Pegged Assets',
200  //     subtitle: 'Polkadot-Ethereum',
201  //     icon: sdk.ipfs.getDataURILoader('QmYCfAzYWvHf1NBQodQedqGhs3QRZxCs1QeA4saneyTJgu', 'image/svg+xml'),
202
203  //     chainA: 'ethereum',
204  //     chainB: 'polkadot',
205  //     category: 'custodial',
206  //   },
207  // });
208}
209