76 lines
2.4 KiB
TypeScript
76 lines
2.4 KiB
TypeScript
import { BigNumber } from "@ethersproject/bignumber";
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import { parseNftTransferPayload, parseTokenTransferPayload } from "../vaa";
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export const METADATA_REPLACE = new RegExp("\u0000", "g");
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// note: actual first byte is message type
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// 0 [u8; 32] token_address
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// 32 u16 token_chain
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// 34 [u8; 32] symbol
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// 66 [u8; 32] name
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// 98 u256 tokenId
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// 130 u8 uri_len
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// 131 [u8;len] uri
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// ? [u8; 32] recipient
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// ? u16 recipient_chain
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export function parseNFTPayload(payload: Buffer) {
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const parsed = parseNftTransferPayload(payload);
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return {
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originAddress: parsed.tokenAddress.toString("hex"),
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originChain: parsed.tokenChain,
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symbol: parsed.symbol,
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name: parsed.name,
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tokenId: BigNumber.from(parsed.tokenId),
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uri: parsed.uri,
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targetAddress: parsed.to.toString("hex"),
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targetChain: parsed.toChain,
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};
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}
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// 0 u256 amount
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// 32 [u8; 32] token_address
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// 64 u16 token_chain
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// 66 [u8; 32] recipient
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// 98 u16 recipient_chain
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// 100 u256 fee
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export function parseTransferPayload(payload: Buffer) {
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const parsed = parseTokenTransferPayload(payload);
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return {
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amount: parsed.amount,
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originAddress: parsed.tokenAddress.toString("hex"),
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originChain: parsed.tokenChain,
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targetAddress: parsed.to.toString("hex"),
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targetChain: parsed.toChain,
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fee: parsed.fee === null ? undefined : parsed.fee,
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fromAddress:
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parsed.fromAddress === null
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? undefined
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: parsed.fromAddress.toString("hex"),
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};
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}
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//This returns a corrected amount, which accounts for the difference between the VAA
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//decimals, and the decimals of the asset.
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// const normalizeVaaAmount = (
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// amount: bigint,
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// assetDecimals: number
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// ): bigint => {
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// const MAX_VAA_DECIMALS = 8;
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// if (assetDecimals <= MAX_VAA_DECIMALS) {
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// return amount;
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// }
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// const decimalStringVaa = formatUnits(amount, MAX_VAA_DECIMALS);
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// const normalizedAmount = parseUnits(decimalStringVaa, assetDecimals);
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// const normalizedBigInt = BigInt(truncate(normalizedAmount.toString(), 0));
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// return normalizedBigInt;
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// };
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// function truncate(str: string, maxDecimalDigits: number) {
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// if (str.includes(".")) {
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// const parts = str.split(".");
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// return parts[0] + "." + parts[1].slice(0, maxDecimalDigits);
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// }
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// return str;
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// }
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