otterscan/src/useResolvedAddresses.ts
2021-11-01 04:15:12 -03:00

93 lines
2.3 KiB
TypeScript

import { useState, useEffect, useRef } from "react";
import { JsonRpcProvider } from "@ethersproject/providers";
import { ProcessedTransaction, TransactionData } from "./types";
import { batchPopulate, ResolvedAddresses } from "./api/address-resolver";
export type AddressCollector = () => string[];
export const pageCollector =
(page: ProcessedTransaction[] | undefined): AddressCollector =>
() => {
if (!page) {
return [];
}
const uniqueAddresses = new Set<string>();
for (const tx of page) {
if (tx.from) {
uniqueAddresses.add(tx.from);
}
if (tx.to) {
uniqueAddresses.add(tx.to);
}
}
return Array.from(uniqueAddresses);
};
export const transactionDataCollector =
(txData: TransactionData | null | undefined): AddressCollector =>
() => {
if (!txData) {
return [];
}
const uniqueAddresses = new Set<string>();
// Standard fields
uniqueAddresses.add(txData.from);
if (txData.to) {
uniqueAddresses.add(txData.to);
}
if (txData.confirmedData?.createdContractAddress) {
uniqueAddresses.add(txData.confirmedData?.createdContractAddress);
}
// Dig token transfers
for (const t of txData.tokenTransfers) {
uniqueAddresses.add(t.from);
uniqueAddresses.add(t.to);
uniqueAddresses.add(t.token);
}
// Dig log addresses
if (txData.confirmedData) {
for (const l of txData.confirmedData.logs) {
uniqueAddresses.add(l.address);
// TODO: find a way to dig over decoded address log attributes
}
}
return Array.from(uniqueAddresses);
};
export const useResolvedAddresses = (
provider: JsonRpcProvider | undefined,
addrCollector: AddressCollector
) => {
const [names, setNames] = useState<ResolvedAddresses>();
const ref = useRef<ResolvedAddresses | undefined>();
useEffect(() => {
ref.current = names;
});
useEffect(
() => {
if (!provider) {
return;
}
const populate = async () => {
const _addresses = addrCollector();
const _names = await batchPopulate(provider, _addresses, ref.current);
setNames(_names);
};
populate();
},
// DON'T put names variables in dependency array; this is intentional; useRef
[provider, addrCollector]
);
return names;
};