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HTML

              
                <header><img src="https://docs.synthetix.io/img/logos/synthetix_text_logo_white.png" /></header>

<main>
  <p><button name="start">Start</button></p>
  <div class="two-cols">
    <ul>
      <li id="volume"><strong>Total Volume:</strong><var>?</var></li>
      <li id="count"><strong>Trades:</strong><var>?</var></li>    
      <li id="fees"><strong>Fees:</strong><var>?</var></li>
      <li id="accounts"><strong>Unique Accounts:</strong><var>?</var></li>
      <li id="mean"><strong>Average Trade Size:</strong><var>?</var></li>
    </ul>
    <div id="chart"></div>
  </div>
  
  <h1>Exchanges in the last 24 hours</h1>
  <p class="helper-text">Note: Fees show negative in situations where an exchange and corresponding oracle update have gone into the same block, with the exchange going in before the oracle update. Note that this is only a <a href="https://github.com/Synthetixio/synthetix-subgraph/issues/9">reporting bug here due to The Graph limitation</a>, not on-chain.</p>
  <table cellspacing=0>
    <thead><tr><th>Tx</th><th>Block</th><th>From</th><th>Synth From</th><th>Amount</th><th>(USD)</th><th>Synth To</th><th>Fees (USD)</th><th>Destination</th><th>Gwei</th><th>When</th></tr></thead>
    <tbody></tbody>
  </table>
</main>

              
            
!

CSS

              
                @snx-color: #004433;

body {
  font-family: 'Helvetica';
  font-size: 14px;
  padding: 0;
  margin: 0;
}

header {
  background-color: #0b0816;
  min-height: 50px;
  img {
    padding: 8px;
  }
}

main {
  padding: 20px;
}

button {
	margin: 0px 0px 20px 0;
	padding: 10px 20px;
	font-size: 14px;
	border-radius: 4px;
	background-color: @snx-color;
	color: white;
	font-weight: bold;
	opacity: 0.8;
	cursor: pointer;
	&:hover {
		opacity: 1
	}
	&#cancel {
		background-color: red;
	}
}

input { 
  width: 400px; 
  padding: 5px;
}

ul {
	padding: 0;
	li {
		padding-left: 3px;
		list-style-type: none;
		strong {
			display: inline-block;
			width: 200px;
		}
	}
}

var {
	font-family: "Courier New", "Courier";
	font-size: 18px;
}

.helper-text { 
  color: #aaa;
}

table tbody {
  tr:nth-child(odd) {
    background-color: #eee;
  }
  td {
    padding: 5px;
  }
}

.two-cols {
  display: flex;
  > *:first-child {
    width: 400px;
  }
  > *:last-child {
    width: calc(100% - 420px);
  }
}

.helper-text {
  color: #ccc;
  font-style: italic;
  a {
    color: #aaa;
  }
}
              
            
!

JS

              
                const snxjs = new SynthetixJs.SynthetixJs(); 
const { formatEther, formatUnits, toUtf8String, formatBytes32String } = snxjs.ethers.utils;

const loadingGIF = '<img src="https://media.giphy.com/media/TvLuZ00OIADoQ/giphy.gif" width=150 />';
const tableTarget = document.querySelector('table > tbody');

const esLink = ({ txn, address, label }) => 
 `<a target="_blank" href="https://etherscan.io/${txn ? 'tx' : 'address'}/${txn || address}">${label || txn || address}</a>`

const lookup = async () => {
  try {
    tableTarget.innerHTML = `<tr><td colspan=100>${loadingGIF}</td><tr>`;
    
    const ts = Math.floor(Date.now()/1e3);
    const oneDayAgo = ts - (3600 * 24);

    const synthExchanges = await snxData.exchanges.since({ minTimestamp: oneDayAgo });
    
    const exchanges = synthExchanges.map(({ hash, fromAddress, fromCurrencyKey, toCurrencyKey, fromAmountInUSD, feesInUSD, fromAmount  , block, timestamp, toAddress, gasPrice, date }, i) => {
      
      return {
        hash,
        from: fromAddress,
        fromKey: fromCurrencyKey,
        toKey: toCurrencyKey,
        amount: fromAmount,
        usd: fromAmountInUSD,
        fees: feesInUSD,
        block,
        date,
        account: toAddress,
        gasPrice,
      }
    });
    
    tableTarget.innerHTML = exchanges.map(({ hash, account, from, fromKey, toKey, amount, block, usd, date, gasPrice, fees }) => `
      <tr>
        <td>${esLink({ txn: hash, label: '<img width=24 src="https://etherscan.io/images/favicon2.ico" />' })}</td>
        <td>${block}</td>
        <td>${esLink({ address: from, label:  `${from.slice(0, 6)}...${from.slice(-4)}`})}</td>
        <td>${fromKey}</td>
        <td>${numbro(amount).format('0,0.0000')}</td>
        <td>${numbro(usd).format('$0,0.00')}</td>
        <td>${toKey}</td>
        <td>${numbro(fees).format('$0,0.00')} (${numbro(fees/usd).format('0.00%')})</td>
        <td>${account !== from ? esLink({ address: account, label:  `${account.slice(0, 6)}...${account.slice(-4)}`}) : ''}</td>
        <td>${gasPrice}</td>
        <td class=helper-text style="font-size: 12px;">${date}</td>
      </tr>
    `).join('');
     
    const volume = exchanges.reduce((memo, { usd }) => Number(usd) + memo, 0);
    document.querySelector('#volume var').innerHTML = numbro(volume).format('$0,0.00');
    
    const fees = exchanges.reduce((memo, { fees}) => Number(fees) + memo, 0);
    document.querySelector('#fees var').innerHTML = numbro(fees).format('$0,0.00');
    
    const mean = volume / exchanges.length;
    document.querySelector('#mean var').innerHTML = numbro(mean).format('$0,0.00');
          
    const uniqAccounts = new Set(exchanges.map(({ from }) => from)).size;
    document.querySelector('#accounts var').innerHTML = uniqAccounts;
    
    document.querySelector('#count var').innerHTML = exchanges.length;
    
    const maxGasLimit = await snxjs.Synthetix.gasPriceLimit();
    document.querySelector('#gas var').innerHTML = formatUnits(maxGasLimit, 'gwei') + ' Gwei';
    
    
    // now fetch and populate chart
    
    const chartTarget = document.querySelector('#chart');
    chartTarget.innerHTML = loadingGIF;
    
    // TODO - below should be moved into snxData
    
    const type = 'days';
    const unit = 7;
    const typeToLabelFormatMap = {
			months: ts => moment(ts).format('MMM YY'),
			weeks: ts => 'Week ' + moment(ts).format('ww, YY'),
			days: ts => moment(ts).format('DD MMM YY'),
		};
		const typeWithoutPlural = type.slice(0, type.length - 1);
		// get entries from beyond a certain point
		const timestampInSecs = moment()
			.startOf(typeWithoutPlural)
			.subtract(unit, type)
			.unix();

		// results are reverse chronologically ordered
		const results = await snxData.exchanges.since({ timestampInSecs });
		const groups = [];
		const _cache = {};
		const lastMomentInWindow = moment(results[0].timestamp).endOf(typeWithoutPlural);

		for (const { timestamp, fromAmountInUSD, feesInUSD, fromAddress } of results) {
			const i = Math.abs(moment(timestamp).diff(lastMomentInWindow, type));
			// initialize the grouping
			groups[i] = groups[i] || {
				volume: 0,
				fees: 0,
				unique: 0,
				label: typeToLabelFormatMap[type](timestamp),
			};
			_cache[i] = _cache[i] || {};

			groups[i].volume = Math.round(fromAmountInUSD + groups[i].volume);
			groups[i].fees = Math.round(feesInUSD + groups[i].fees);
			groups[i].unique += !_cache[i][fromAddress] ? 1 : 0;

			_cache[i][fromAddress] = true; // track this address
		}
    
    new frappe.Chart(chartTarget, {  
      title: 'Last 7 Days Exchange Volume (in millions USD)',
      data: {
        labels: groups.map(({ label }) => label),
        datasets: [
          {
            name: 'USD',
            values: groups.map(({ volume }) => volume/1e6)
          }
        ]
      },
      type: 'bar', 
      colors: ['#7cd6fd', '#743ee2']
    });
    
  } catch (err) {
    console.error(err);
  }
};

document.querySelector('button[name=start]').addEventListener('click', lookup);
              
            
!
999px

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