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Extract swr fetcher

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This commit is contained in:
Willian Mitsuda 2022-08-09 01:50:38 -03:00
parent 5fc0058fb9
commit 50ac6f7a3e
No known key found for this signature in database
1 changed files with 28 additions and 31 deletions
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55
src/use4Bytes.ts
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@ -5,6 +5,7 @@ import {
TransactionDescription,
} from "@ethersproject/abi";
import { BigNumberish } from "@ethersproject/bignumber";
import { Fetcher } from "swr";
import useSWRImmutable from "swr/immutable";
import { RuntimeContext } from "./useRuntime";
import { fourBytesURL } from "./url";
@ -29,16 +30,32 @@ export const extract4Bytes = (rawInput: string): string | null => {
return rawInput.slice(0, 10);
};
const fetch4Bytes = async (
assetsURLPrefix: string,
fourBytes: string
): Promise<FourBytesEntry | null> => {
type FourBytesKey = [id: "4bytes", fourBytes: string];
type FourBytesFetcher = Fetcher<
FourBytesEntry | null | undefined,
FourBytesKey
>;
const fourBytesFetcher =
(assetsURLPrefix: string): FourBytesFetcher =>
async (_, key) => {
if (key === null || key === "0x") {
return undefined;
}
// Handle simple transfers with invalid selector like tx:
// 0x8bcbdcc1589b5c34c1e55909c8269a411f0267a4fed59a73dd4348cc71addbb9,
// which contains 0x00 as data
if (key.length !== 10) {
return undefined;
}
const fourBytes = key.slice(2);
const signatureURL = fourBytesURL(assetsURLPrefix, fourBytes);
try {
const res = await fetch(signatureURL);
if (!res.ok) {
console.error(`Signature does not exist in 4bytes DB: ${fourBytes}`);
console.warn(`Signature does not exist in 4bytes DB: ${fourBytes}`);
return null;
}
@ -53,10 +70,6 @@ const fetch4Bytes = async (
signature: sig,
};
return entry;
} catch (err) {
console.error(`Couldn't fetch signature URL ${signatureURL}`, err);
return null;
}
};
/**
@ -75,26 +88,10 @@ export const use4Bytes = (
const { config } = useContext(RuntimeContext);
const assetsURLPrefix = config?.assetsURLPrefix;
const fourBytesKey = assetsURLPrefix !== undefined ? rawFourBytes : null;
const fourBytesFetcher = (key: string | null) => {
if (key === null || key === "0x") {
return undefined;
}
// Handle simple transfers with invalid selector like tx:
// 0x8bcbdcc1589b5c34c1e55909c8269a411f0267a4fed59a73dd4348cc71addbb9,
// which contains 0x00 as data
if (key.length !== 10) {
return undefined;
}
return fetch4Bytes(assetsURLPrefix!, key.slice(2));
};
const { data, error } = useSWRImmutable<FourBytesEntry | null | undefined>(
assetsURLPrefix !== undefined ? rawFourBytes : null,
fourBytesFetcher
);
const fetcher = fourBytesFetcher(assetsURLPrefix!);
const { data, error } = useSWRImmutable(["4bytes", fourBytesKey], fetcher);
return error ? undefined : data;
};