const Container = styled.div` .content input{ background: #152528; border-radius: 12px; height: 55px; font-size:20px; color: #7E8A93; padding:0 15px 0 15px; border:none; outline:none; margin-bottom:8px; } .content input:focus{ outline:none; } input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { -webkit-appearance: none; } .content .balance { font-size:12px; color:#4B6778; margin-left:6px; } .template{ display:flex; align-items:center; justify-content:space-between; margin-left:6px; } .template .title{ font-size:14px; color:#7E8A93; } .template .value{ font-size:14px; color:#fff; } .mt_25{ margin-top:25px; } .mt-10{ margin-top:10px; } .greenButton{ display:flex; align-items:center; justify-content:center; background: #00FFD1; border-radius: 12px; height:46px; font-weight: 700; font-size: 18px; color:#000; cursor:pointer; width:100%; } .disabled{ opacity:0.3; cursor: not-allowed; } `; /** base tool start */ let BURROW_CONTRACT = "contract.main.burrow.near"; let accountId = context.accountId; let MAX_RATIO = 10_000; let B = Big(); B.DP = 60; // set precision to 60 decimals const toAPY = (v) => Math.round(v * 100) / 100; const clone = (o) => JSON.parse(JSON.stringify(o)); const shrinkToken = (value, decimals) => { return new Big(value).div(new Big(10).pow(decimals)); }; const expandToken = (value, decimals) => { return new Big(value).mul(new Big(10).pow(decimals)); }; const formatToken = (v) => Math.floor(v * 10_000) / 10_000; const { showModal, selectedTokenId } = props; const { rewards, balances, account: burrowAccount, amount, hasError, assets, cfButtonStatus, newHealthFactor, } = state; const hasData = assets.length > 0 && rewards.length > 0; if (!showModal) { State.update({ amount: "", hasError: false, }); } /** base tool end */ if (!accountId) { return <Widget src="juaner.near/widget/ref_account-signin" />; } const onLoad = (data) => { State.update(data); }; const account = fetch("https://rpc.mainnet.near.org", { method: "POST", headers: { "Content-Type": "application/json", }, body: JSON.stringify({ jsonrpc: "2.0", id: "dontcare", method: "query", params: { request_type: "view_account", finality: "final", account_id: accountId, }, }), }); if (!account) { return null; } /** logic start */ const b = account.body.result.amount; const nearBalance = shrinkToken(b || "0", 24).toFixed(2); let vailableBalance = 0; let apy = 0; let cf = "-"; const getBalance = (asset) => { if (!asset) return 0; const { token_id, accountBalance, metadata } = asset; return formatToken( shrinkToken(accountBalance, metadata.decimals).toFixed() ).toString(); }; const getApy = (asset) => { if (!asset && !rewards) return 0; const r = rewards.find((a) => a.token_id === asset.token_id); const totalApy = r.apyBase + r.apyRewardTvl + r.apyReward; return toAPY(totalApy); }; if (selectedTokenId && assets) { const token = selectedTokenId === "NEAR" ? "wrap.near" : selectedTokenId; const asset = assets.find((a) => a.token_id === token); vailableBalance = selectedTokenId === "NEAR" ? nearBalance : getBalance(asset); apy = getApy(asset); cf = asset.config.volatility_ratio / 100; } const storageBurrow = Near.view(BURROW_CONTRACT, "storage_balance_of", { account_id: accountId, }); const storageToken = selectedTokenId ? Near.view(selectedTokenId, "storage_balance_of", { account_id: accountId, }) : null; const handleAmount = (e) => { const amount = Number(e.target.value); const b = recomputeHealthFactor(selectedTokenId, amount); State.update({ amount: Number(e.target.value), selectedTokenId, hasError: false, newHealthFactor: recomputeHealthFactor(selectedTokenId, amount), }); }; const handleDeposit = () => { if (!selectedTokenId || !amount || hasError) return; if (selectedTokenId === "NEAR") { handleDepositNear(amount); return; } const asset = assets.find((a) => a.token_id === selectedTokenId); const { token_id, accountBalance, metadata, config } = asset; const balance = formatToken( shrinkToken(accountBalance, metadata.decimals).toFixed() ); if (amount > balance) { State.update({ selectedTokenId, amount, hasError: true }); return; } const expandedAmount = expandToken(amount, metadata.decimals).toFixed(); const collateralAmount = expandToken( amount, metadata.decimals + config.extra_decimals ).toFixed(); const collateralMsg = config.can_use_as_collateral && cfButtonStatus ? `{"Execute":{"actions":[{"IncreaseCollateral":{"token_id": "${token_id}","max_amount":"${collateralAmount}"}}]}}` : ""; const transactions = []; const depositTransaction = { contractName: token_id, methodName: "ft_transfer_call", deposit: new Big("1").toFixed(), gas: expandToken(300, 12), args: { receiver_id: BURROW_CONTRACT, amount: expandedAmount, msg: collateralMsg, }, }; if (storageToken?.available === "0" || !storageToken?.available) { transactions.push({ contractName: token_id, methodName: "storage_deposit", deposit: expandToken(0.25, 24).toFixed(), }); } if (storageBurrow?.available === "0" || !storageBurrow?.available) { transactions.push({ contractName: BURROW_CONTRACT, methodName: "storage_deposit", deposit: expandToken(0.25, 24).toFixed(), gas: expandToken(140, 12), }); } transactions.push(depositTransaction); Near.call(transactions); }; const handleDepositNear = (amount) => { const amountDecimal = expandToken(amount, 24).toFixed(); Near.call([ { contractName: "wrap.near", methodName: "near_deposit", deposit: amountDecimal, gas: expandToken(300, 12), }, { contractName: "wrap.near", methodName: "ft_transfer_call", deposit: new Big("1").toFixed(), gas: expandToken(300, 12), args: { receiver_id: BURROW_CONTRACT, amount: amountDecimal, msg: cfButtonStatus ? `{"Execute":{"actions":[{"IncreaseCollateral":{"token_id":"wrap.near","max_amount":"${amountDecimal}"}}]}}` : "", }, }, ]); }; function getAdjustedSum(type, burrowAccount) { if (!assets || !burrowAccount || burrowAccount[type].length == 0) return B(1); return burrowAccount[type] .map((assetInAccount) => { const asset = assets.find((a) => a.token_id === assetInAccount.token_id); const price = asset.price ? B(asset.price.multiplier).div(B(10).pow(asset.price.decimals)) : B(0); const pricedBalance = B(assetInAccount.balance) .div(expandToken(1, asset.config.extra_decimals)) .mul(price); return type === "borrowed" ? pricedBalance .div(asset.config.volatility_ratio) .mul(MAX_RATIO) .toFixed() : pricedBalance .mul(asset.config.volatility_ratio) .div(MAX_RATIO) .toFixed(); }) .reduce((sum, cur) => B(sum).plus(B(cur)).toFixed()); } const adjustedCollateralSum = getAdjustedSum("collateral", burrowAccount); const adjustedBorrowedSum = getAdjustedSum("borrowed", burrowAccount); function getHealthFactor() { const healthFactor = B(adjustedCollateralSum) .div(B(adjustedBorrowedSum)) .mul(100) .toFixed(0); return Number(healthFactor) < MAX_RATIO ? healthFactor : MAX_RATIO; } const healthFactor = getHealthFactor(); /** logic end */ function switchButtonStatus() { cfButtonStatus; State.update({ cfButtonStatus: !cfButtonStatus, }); } const recomputeHealthFactor = (tokenId, amount) => { if (!tokenId || !amount || !assets) return null; const asset = assets.find((a) => a.token_id === tokenId); const decimals = asset.metadata.decimals + asset.config.extra_decimals; const accountCollateralAsset = burrowAccount.collateral.find( (a) => a.token_id === tokenId ); const newBalance = expandToken(amount, decimals) .plus(B(accountCollateralAsset?.balance || 0)) .toFixed(); const clonedAccount = clone(burrowAccount); const updatedToken = { token_id: tokenId, balance: newBalance, shares: newBalance, apr: "0", }; if (clonedAccount?.collateral.length === 0) { clonedAccount.collateral = updatedToken; } else if (!accountCollateralAsset) { clonedAccount.collateral.push(updatedToken); } else { clonedAccount.collateral = [ ...clonedAccount.collateral.filter((a) => a.token_id !== tokenId), updatedToken, ]; } const adjustedCollateralSum = getAdjustedSum( "collateral", amount === 0 ? burrowAccount : clonedAccount ); const adjustedBorrowedSum = getAdjustedSum("borrowed", burrowAccount); const newHealthFactor = B(adjustedCollateralSum) .div(B(adjustedBorrowedSum)) .mul(100) .toFixed(0); return Number(newHealthFactor) < MAX_RATIO ? newHealthFactor : MAX_RATIO; }; return ( <Container> {/* load data */} {!hasData && ( <Widget src="juaner.near/widget/ref_burrow-data" props={{ onLoad }} /> )} <div class="content"> <input type="number" value={amount} onChange={handleAmount} /> {selectedTokenId && ( <span class="balance">Balance: {vailableBalance}</span> )} {hasError && ( <p class="alert alert-danger mt-10" role="alert"> Amount greater than available </p> )} <div class="template mt_25"> <span class="title">Supply APY</span> <span class="value">{apy}%</span> </div> <div class="template mt_25"> <span class="title">Health Factor</span> <span class="value"> {newHealthFactor && cfButtonStatus ? newHealthFactor : healthFactor}% </span> </div> <div class="template mt_25"> <span class="title">Collateral Factor</span> <div class="flex-center"> <span class="value">{cf}%</span> <div class={`switchButton ${ cfButtonStatus ? "justify-end" : "justify-start" }`} onClick={switchButtonStatus} > <label class="whiteBall"></label> </div> </div> </div> <div class={`greenButton mt_25 ${Number(amount) ? "" : "disabled"}`} onClick={handleDeposit} > Supply </div> </div> </Container> );