utils#optimismErc20Pairs TypeScript Examples
The following examples show how to use
utils#optimismErc20Pairs.
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Example #1
Source File: hooks.ts From frontend-v1 with GNU Affero General Public License v3.0 | 4 votes |
export function useSendOptimism() {
const [optimismBridge] = useState(new OptimismBridgeClient());
const { isConnected, chainId, account, signer } = useConnection();
const {
fromChain,
amount,
token,
currentlySelectedFromChain,
currentlySelectedToChain,
toAddress,
error,
} = useAppSelector((state) => state.send);
const { block } = useL2Block();
const { balance: balanceStr } = useBalance({
chainId: fromChain,
account,
tokenAddress: token,
});
const bridgeAddress = useMemo(() => {
try {
return optimismBridge.getL1BridgeAddress(chainId as number);
} catch (error) {
return "";
}
}, [optimismBridge, chainId]);
const balance = BigNumber.from(balanceStr);
const { data: allowance } = useAllowance(
{
chainId: fromChain,
token,
owner: account!,
spender: bridgeAddress,
amount,
},
{ skip: !account || !isConnected || !chainId }
);
const canApprove = balance.gte(amount) && amount.gte(0);
const hasToApprove = allowance?.hasToApprove ?? true;
//TODO: Add fees
const [fees] = useState({
instantRelayFee: {
total: BigNumber.from("0"),
pct: BigNumber.from("0"),
},
slowRelayFee: {
total: BigNumber.from("0"),
pct: BigNumber.from("0"),
},
lpFee: {
total: BigNumber.from("0"),
pct: BigNumber.from("0"),
},
isAmountTooLow: false,
isLiquidityInsufficient: false,
});
const send = useCallback(async () => {
if (!isConnected || !signer) return {};
if (!(await validateContractAndChain(bridgeAddress, fromChain, signer))) {
return {};
}
if (token === ethers.constants.AddressZero) {
return {
tx: await optimismBridge.depositEth(signer, amount),
fees,
};
} else {
const pairToken = optimismErc20Pairs()[token];
if (!pairToken) return {};
return {
tx: await optimismBridge.depositERC20(signer, token, pairToken, amount),
fees,
};
}
}, [
amount,
fees,
token,
isConnected,
optimismBridge,
signer,
fromChain,
bridgeAddress,
]);
const approve = useCallback(() => {
if (!signer) return;
return optimismBridge.approve(signer, token, MAX_APPROVAL_AMOUNT);
}, [optimismBridge, signer, token]);
const hasToSwitchChain =
isConnected && currentlySelectedFromChain.chainId !== chainId;
const canSend = useMemo(
() =>
currentlySelectedFromChain.chainId &&
block &&
currentlySelectedToChain.chainId &&
amount &&
token &&
fees &&
toAddress &&
isValidAddress(toAddress) &&
!hasToApprove &&
!hasToSwitchChain &&
!error &&
balance.gte(amount),
[
currentlySelectedFromChain.chainId,
block,
currentlySelectedToChain.chainId,
amount,
token,
fees,
toAddress,
hasToApprove,
hasToSwitchChain,
error,
balance,
]
);
return {
canSend,
canApprove,
hasToApprove,
hasToSwitchChain,
send,
approve,
fees,
spender: bridgeAddress,
};
}