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Reduce the amount of network calls by probing first only name() and on success probe other erc20 methods

This commit is contained in:
Willian Mitsuda 2021-11-29 14:45:14 -03:00
parent 53630f43a4
commit 832f5f435f
1 changed files with 12 additions and 5 deletions
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17
src/api/address-resolver/ERCTokenResolver.ts
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@ -1,24 +1,31 @@
import { BaseProvider } from "@ethersproject/providers";
import { Contract } from "@ethersproject/contracts";
import { Interface } from "@ethersproject/abi";
import { IAddressResolver } from "./address-resolver";
import erc20 from "../../erc20.json";
import { TokenMeta } from "../../types";
const erc20Interface = new Interface(erc20);
export class ERCTokenResolver implements IAddressResolver<TokenMeta> {
async resolveAddress(
provider: BaseProvider,
address: string
): Promise<TokenMeta | undefined> {
const erc20Contract = new Contract(address, erc20, provider);
const erc20Contract = new Contract(address, erc20Interface, provider);
try {
const [name, symbol, decimals] = (await Promise.all([
erc20Contract.name(),
const name = (await erc20Contract.name()) as string;
if (!name.trim()) {
return undefined;
}
const [symbol, decimals] = (await Promise.all([
erc20Contract.symbol(),
erc20Contract.decimals(),
])) as [string, string, number];
])) as [string, number];
// Prevent faulty tokens with empty name/symbol
if (!name.trim() || !symbol.trim()) {
if (!symbol.trim()) {
return undefined;
}