@biconomy/sdk
Version:
SDK for Biconomy integration with support for account abstraction, smart accounts, ERC-4337.
53 lines • 1.96 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getUnifiedERC20Balance = getUnifiedERC20Balance;
const viem_1 = require("viem");
async function getUnifiedERC20Balance(parameters) {
const { mcToken, account: account_ } = parameters;
const relevantTokensByChain = Array.from(mcToken.deployments).filter(([chainId]) => {
return account_.deployments.some((account) => account.client.chain?.id === chainId);
});
const balances = await Promise.all(relevantTokensByChain.map(async ([chainId, address]) => {
const account = account_.deployments.filter((account) => account.client.chain?.id === chainId)[0];
const tokenContract = (0, viem_1.getContract)({
abi: viem_1.erc20Abi,
address,
client: account.client
});
const [balance, decimals] = await Promise.all([
tokenContract.read.balanceOf([account.address]),
tokenContract.read.decimals()
]);
return {
balance,
decimals,
chainId
};
}));
return {
...balances
.map((balance) => {
return {
balance: balance.balance,
decimals: balance.decimals
};
})
.reduce((curr, acc) => {
if (curr.decimals !== acc.decimals) {
throw Error(`
Error while trying to fetch a unified ERC20 balance. The addresses provided
in the mapping don't have the same number of decimals across all chains.
The function can't fetch a unified balance for token mappings with differing
decimals.
`);
}
return {
balance: curr.balance + acc.balance,
decimals: curr.decimals
};
}),
breakdown: balances,
mcToken
};
}
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