@ledgerhq/live-common/src/bridge/generic-alpaca/families/evm/bridge.ts

Common ground for the Ledger Live apps

import type { AssetInfo } from "@ledgerhq/coin-framework/api/types";
import type { BridgeApi } from "@ledgerhq/ledger-wallet-framework/api/types";
import type { CryptoCurrency, TokenCurrency } from "@ledgerhq/types-cryptoassets";
import { getCryptoAssetsStore } from "@ledgerhq/cryptoassets/state";
import eip55 from "eip55";

export async function getTokenFromAsset(
  currency: CryptoCurrency,
  asset: AssetInfo,
): Promise<TokenCurrency | undefined> {
  const result =
    "assetReference" in asset && typeof asset.assetReference === "string"
      ? await getCryptoAssetsStore().findTokenByAddressInCurrency(asset.assetReference, currency.id)
      : undefined;
  return result;
}

export function getAssetFromToken(
  currency: CryptoCurrency,
  token: TokenCurrency,
  owner: string,
): AssetInfo {
  if (token.parentCurrency.id !== currency.id) {
    throw new Error(`'${token.id}' is not a valid token for '${currency.id}'`);
  }

  return {
    type: token.tokenType,
    assetReference: eip55.encode(token.contractAddress),
    assetOwner: owner,
    name: token.name,
    unit: token.units[0],
  };
}

export default function evmBridge(currency: CryptoCurrency): BridgeApi {
  return {
    getTokenFromAsset: async (asset: AssetInfo) => getTokenFromAsset(currency, asset),
    getAssetFromToken: (token: TokenCurrency, owner: string) =>
      getAssetFromToken(currency, token, owner),
  };
}