utils#toWeiSafe TypeScript Examples

PoolForm: FC<Props> = ({
  symbol,
  icon,
  decimals,
  totalPoolSize,
  totalPosition,
  apy,
  position,
  feesEarned,
  bridgeAddress,
  lpTokens,
  tokenAddress,
  setShowSuccess,
  setDepositUrl,
  balance,
  wrongNetwork,
  refetchBalance,
  defaultTab,
  setDefaultTab,
  utilization,
  projectedApr,
}) => {
  const [inputAmount, setInputAmount] = useState("");
  const [removeAmount, setRemoveAmount] = useState(0);
  const [error] = useState<Error>();
  const [formError, setFormError] = useState("");
  const [addLiquidityGas, setAddLiquidityGas] = useState<ethers.BigNumber>(
    DEFAULT_ADD_LIQUIDITY_ETH_GAS_ESTIMATE
  );
  const { isConnected, signer } = useConnection();

  // update our add-liquidity to contract call gas usage on an interval for eth only
  useEffect(() => {
    if (!signer || !bridgeAddress || !isConnected || symbol !== "ETH") return;

    estimateGasForAddEthLiquidity(signer, bridgeAddress)
      .then(setAddLiquidityGas)
      .catch((err) => {
        console.error("Error getting estimating gas usage", err);
      });

    // get gas estimate on an interval
    const handle = setInterval(() => {
      estimateGasForAddEthLiquidity(signer, bridgeAddress)
        .then(setAddLiquidityGas)
        .catch((err) => {
          console.error("Error getting estimating gas usage", err);
        });
    }, UPDATE_GAS_INTERVAL_MS);

    return () => clearInterval(handle);
  }, [signer, isConnected, bridgeAddress, symbol]);

  // Validate input on change
  useEffect(() => {
    const value = inputAmount;
    try {
      // liquidity button should be disabled if value is 0, so we dont actually need an error.
      if (Number(value) === 0) return setFormError("");
      if (Number(value) < 0) return setFormError("Cannot be less than 0.");
      if (value && balance) {
        const valueToWei = toWeiSafe(value, decimals);
        if (valueToWei.gt(balance)) {
          return setFormError("Liquidity amount greater than balance.");
        }
      }

      if (value && symbol === "ETH") {
        const valueToWei = toWeiSafe(value, decimals);
        if (valueToWei.add(addLiquidityGas).gt(balance)) {
          return setFormError("Transaction may fail due to insufficient gas.");
        }
      }
    } catch (e) {
      return setFormError("Invalid number.");
    }
    // clear form if no errors were presented. All errors should return early.
    setFormError("");
  }, [inputAmount, balance, decimals, symbol, addLiquidityGas]);

  const handleMaxClick = useCallback(() => {
    let value = ethers.utils.formatUnits(balance, decimals);
    if (symbol !== "ETH") return setInputAmount(value);
    value = formatEtherRaw(
      max("0", BigNumber.from(balance).sub(addLiquidityGas))
    );
    setInputAmount(value);
  }, [balance, decimals, symbol, addLiquidityGas]);

  // if pool changes, set input value to "".
  useEffect(() => {
    setInputAmount("");
    setFormError("");
    setRemoveAmount(0);
  }, [bridgeAddress]);

  return (
    <Wrapper>
      <Info>
        <Logo src={icon} />
        <InfoText>{symbol} Pool</InfoText>
      </Info>
      <Position>
        <PositionItem>
          <div>Position Size</div>
          <div>
            {formatUnits(totalPosition, decimals).replace("-", "")} {symbol}
          </div>
        </PositionItem>
        <PositionItem>
          <div>Total fees earned</div>
          <div>
            {formatUnits(feesEarned, decimals)} {symbol}
          </div>
        </PositionItem>
      </Position>
      <ROI>
        <ROIItem>
          <div>Total pool size:</div>
          <div>
            {formatUnits(totalPoolSize, decimals)} {symbol}
          </div>
        </ROIItem>
        <ROIItem>
          <div>Pool utilization:</div>
          <div>{formatUnits(utilization, 16)}%</div>
        </ROIItem>
        <ROIItem>
          <div>Current APY:</div>
          <div>{numberFormatter(Number(apy)).replaceAll(",", "")}%</div>
        </ROIItem>
        <ROIItem>
          <div>Projected APY:</div>
          <div>
            {numberFormatter(Number(projectedApr)).replaceAll(",", "")}%
          </div>
        </ROIItem>
      </ROI>
      <Tabs
        defaultTab={defaultTab}
        changeDefaultTab={(tab: string) => {
          setDefaultTab(tab);
        }}
      >
        <TabContentWrapper data-label="Add">
          {blockLiquidity ? (
            <LiquidityBlocked>
              <div>
                Pool migration is happening now, please withdraw liquidity from
                here and deposit in{" "}
                <a href="https://v2.across.to" target="_blank" rel="noreferrer">
                  Across v2
                </a>
              </div>
            </LiquidityBlocked>
          ) : null}
          <AddLiquidityForm
            wrongNetwork={wrongNetwork}
            error={error}
            formError={formError}
            amount={inputAmount}
            onChange={setInputAmount}
            bridgeAddress={bridgeAddress}
            decimals={decimals}
            symbol={symbol}
            tokenAddress={tokenAddress}
            setShowSuccess={setShowSuccess}
            setDepositUrl={setDepositUrl}
            balance={balance}
            setAmount={setInputAmount}
            refetchBalance={refetchBalance}
            onMaxClick={handleMaxClick}
          />
        </TabContentWrapper>
        <TabContentWrapper data-label="Remove">
          <RemoveLiquidityForm
            wrongNetwork={wrongNetwork}
            removeAmount={removeAmount}
            setRemoveAmount={setRemoveAmount}
            bridgeAddress={bridgeAddress}
            lpTokens={lpTokens}
            decimals={decimals}
            symbol={symbol}
            setShowSuccess={setShowSuccess}
            setDepositUrl={setDepositUrl}
            balance={balance}
            position={position}
            feesEarned={feesEarned}
            totalPosition={totalPosition}
            refetchBalance={refetchBalance}
          />
        </TabContentWrapper>
      </Tabs>
    </Wrapper>
  );
}

RemoveLiqudityForm: FC<Props> = ({
  removeAmount,
  setRemoveAmount,
  bridgeAddress,
  lpTokens,
  decimals,
  symbol,
  setShowSuccess,
  setDepositUrl,
  position,
  feesEarned,
  wrongNetwork,
  totalPosition,
}) => {
  const { init } = onboard;
  const { isConnected, provider, signer, notify, account } = useConnection();
  const [txSubmitted, setTxSubmitted] = useState(false);
  const [updateEthBalance] = api.endpoints.ethBalance.useLazyQuery();
  function buttonMessage() {
    if (!isConnected) return "Connect wallet";
    if (wrongNetwork) return "Switch to Ethereum Mainnet";
    return "Remove liquidity";
  }
  const [errorMessage, setErrorMessage] = useState("");
  useEffect(() => {
    setErrorMessage("");
  }, [removeAmount]);

  const handleButtonClick = async () => {
    if (!provider) {
      init();
    }
    if (isConnected && removeAmount > 0 && signer) {
      setErrorMessage("");
      const scaler = toBN("10").pow(decimals);

      const removeAmountToWei = toWeiSafe(
        (removeAmount / 100).toString(),
        decimals
      );

      const weiAmount = lpTokens.mul(removeAmountToWei).div(scaler);

      try {
        let txId;
        if (symbol === "ETH") {
          txId = await poolClient.removeEthliquidity(
            signer,
            bridgeAddress,
            weiAmount
          );
        } else {
          txId = await poolClient.removeTokenLiquidity(
            signer,
            bridgeAddress,
            weiAmount
          );
        }
        const transaction = poolClient.getTx(txId);

        if (transaction.hash) {
          setTxSubmitted(true);

          const { emitter } = notify.hash(transaction.hash);
          emitter.on("all", addEtherscan);

          emitter.on("txConfirmed", (tx) => {
            if (transaction.hash) notify.unsubscribe(transaction.hash);
            const url = `https://etherscan.io/tx/${transaction.hash}`;
            setShowSuccess("withdraw");
            setDepositUrl(url);
            setTxSubmitted(false);
            if (account)
              setTimeout(
                () => updateEthBalance({ chainId: 1, account }),
                15000
              );
          });
          emitter.on("txFailed", () => {
            if (transaction.hash) notify.unsubscribe(transaction.hash);
            setTxSubmitted(false);
          });
        }
        return transaction;
      } catch (err: any) {
        setErrorMessage(err.message);
        console.error("err in RemoveLiquidity call", err);
      }
    }
  };

  const preview = isConnected
    ? previewRemoval(
        {
          totalDeposited: position,
          feesEarned: max(feesEarned, 0),
          positionValue: totalPosition,
        },
        removeAmount / 100
      )
    : null;

  return (
    <>
      <RemoveAmount>
        Amount: <span>{removeAmount}%</span>
      </RemoveAmount>
      <PoolFormSlider value={removeAmount} setValue={setRemoveAmount} />
      <RemovePercentButtonsWrapper>
        <RemovePercentButton onClick={() => setRemoveAmount(25)}>
          25%
        </RemovePercentButton>
        <RemovePercentButton onClick={() => setRemoveAmount(50)}>
          50%
        </RemovePercentButton>
        <RemovePercentButton onClick={() => setRemoveAmount(75)}>
          75%
        </RemovePercentButton>
        <RemovePercentButton onClick={() => setRemoveAmount(100)}>
          MAX
        </RemovePercentButton>
      </RemovePercentButtonsWrapper>

      {isConnected && (
        <>
          <FeesBlockWrapper>
            <FeesBlock>
              <FeesBoldInfo>
                Remove amount <FeesPercent>({removeAmount}%)</FeesPercent>
              </FeesBoldInfo>
              <FeesInfo>Left in pool</FeesInfo>
            </FeesBlock>
            <FeesBlock>
              <FeesValues>
                {preview && formatUnits(preview.position.recieve, decimals)}{" "}
                {symbol}
              </FeesValues>
              <FeesValues>
                {preview && formatUnits(preview.position.remain, decimals)}{" "}
                {symbol}
              </FeesValues>
            </FeesBlock>
          </FeesBlockWrapper>
          <FeesBlockWrapper>
            <FeesBlock>
              <FeesBoldInfo>Fees claimed</FeesBoldInfo>
              <FeesInfo>Left in pool</FeesInfo>
            </FeesBlock>
            <FeesBlock>
              <FeesValues>
                {preview && formatUnits(preview.fees.recieve, decimals)}{" "}
                {symbol}
              </FeesValues>
              <FeesValues>
                {preview && formatUnits(preview.fees.remain, decimals)} {symbol}
              </FeesValues>
            </FeesBlock>
          </FeesBlockWrapper>
          <FeesBlockWrapper>
            <FeesBlock>
              <FeesBoldInfo>You will receive</FeesBoldInfo>
            </FeesBlock>
            <FeesBlock>
              <FeesValues>
                {preview && formatUnits(preview.total.recieve, decimals)}{" "}
                {symbol}
              </FeesValues>
            </FeesBlock>
          </FeesBlockWrapper>
        </>
      )}
      <RemoveFormButtonWrapper>
        {errorMessage && (
          <RemoveFormErrorBox>
            <div>{errorMessage}</div>
          </RemoveFormErrorBox>
        )}
        {wrongNetwork && provider ? (
          <RemoveFormButton
            onClick={() => switchChain(provider, DEFAULT_TO_CHAIN_ID)}
          >
            Switch to {CHAINS[DEFAULT_TO_CHAIN_ID].name}
          </RemoveFormButton>
        ) : (
          <RemoveFormButton
            onClick={handleButtonClick}
            disabled={wrongNetwork && !provider}
          >
            {buttonMessage()}
            {txSubmitted ? <BouncingDotsLoader /> : null}
          </RemoveFormButton>
        )}
      </RemoveFormButtonWrapper>
    </>
  );
}