Sentinel Bitcoin Sync (hardcoded Auth)

The workflow JSON

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{
  "name": "Sentinel Bitcoin Sync (Hardcoded Auth)",
  "nodes": [
    {
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "hours",
              "hoursInterval": 1
            }
          ]
        }
      },
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1.1,
      "position": [
        250,
        300
      ]
    },
    {
      "parameters": {
        "url": "https://api.coingecko.com/api/v3/coins/bitcoin/market_chart",
        "options": {},
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "x-cg-demo-api-key",
              "value": "CG-unVU5nDtud2jHLq8eBU1shZ2"
            }
          ]
        },
        "sendQuery": true,
        "queryParameters": {
          "parameters": [
            {
              "name": "vs_currency",
              "value": "usd"
            },
            {
              "name": "days",
              "value": "365"
            }
          ]
        }
      },
      "name": "CoinGecko API",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.1,
      "position": [
        450,
        300
      ]
    },
    {
      "parameters": {
        "jsCode": "function calculateSMA(prices,period){if(prices.length<period)return null;const slice=prices.slice(-period);return slice.reduce((a,b)=>a+b,0)/period}function calculateRSI(prices,period=14){if(prices.length<period+1)return null;let gains=0;let losses=0;for(let i=prices.length-period;i<prices.length;i++){const diff=prices[i]-prices[i-1];if(diff>0)gains+=diff;else losses-=diff}const avgGain=gains/period;const avgLoss=losses/period;if(avgLoss===0)return 100;const rs=avgGain/avgLoss;return 100-(100/(1+rs))}function calculateBollingerBands(prices,period=20,stdDev=2){if(prices.length<period)return{upper:null,lower:null};const slice=prices.slice(-period);const sma=slice.reduce((a,b)=>a+b,0)/period;const variance=slice.reduce((a,b)=>a+Math.pow(b-sma,2),0)/period;const std=Math.sqrt(variance);return{upper:sma+(stdDev*std),lower:sma-(stdDev*std)}}function processMarketData(items){const rawData=items[0].json;const priceData=rawData.prices||[];if(priceData.length===0){throw new Error('No price data received from CoinGecko API')}const closePrices=[];let maxPrice=0;const results=[];for(const[timestamp,price]of priceData){closePrices.push(price);if(price>maxPrice)maxPrice=price;const date=new Date(timestamp).toISOString().split('T')[0];const sma50=calculateSMA(closePrices,50);const sma200=calculateSMA(closePrices,200);const rsi=calculateRSI(closePrices,14);const{upper:bbUpper,lower:bbLower}=calculateBollingerBands(closePrices,20,2);const drawdownPct=((price-maxPrice)/maxPrice)*100;results.push({date,close:Math.round(price*100)/100,open:Math.round(price*100)/100,high:Math.round(price*100)/100,low:Math.round(price*100)/100,volume:0,sma_50:sma50?Math.round(sma50*100)/100:null,sma_200:sma200?Math.round(sma200*100)/100:null,rsi:rsi?Math.round(rsi*100)/100:null,bb_upper:bbUpper?Math.round(bbUpper*100)/100:null,bb_lower:bbLower?Math.round(bbLower*100)/100:null,drawdown_pct:Math.round(drawdownPct*100)/100})}return results.slice(-30)}return $input.all().map(item=>{const processedData=processMarketData($input.all());return processedData.map(row=>({json:row}))}).flat();"
      },
      "name": "Calculate Indicators",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        650,
        300
      ]
    },
    {
      "parameters": {
        "method": "POST",
        "url": "https://uzxocjwuisgzldbtppnk.supabase.co/rest/v1/bitcoin_data",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "apikey",
              "value": "<redacted-credential>"
            },
            {
              "name": "Authorization",
              "value": "<redacted-credential>"
            },
            {
              "name": "Content-Type",
              "value": "application/json"
            },
            {
              "name": "Prefer",
              "value": "resolution=merge-duplicates"
            }
          ]
        },
        "sendBody": true,
        "bodyParameters": {
          "parameters": [
            {
              "name": "date",
              "value": "={{ $json.date }}"
            },
            {
              "name": "close",
              "value": "={{ $json.close }}"
            },
            {
              "name": "sma_50",
              "value": "={{ $json.sma_50 }}"
            },
            {
              "name": "sma_200",
              "value": "={{ $json.sma_200 }}"
            },
            {
              "name": "rsi",
              "value": "={{ $json.rsi }}"
            },
            {
              "name": "bb_upper",
              "value": "={{ $json.bb_upper }}"
            },
            {
              "name": "bb_lower",
              "value": "={{ $json.bb_lower }}"
            },
            {
              "name": "drawdown_pct",
              "value": "={{ $json.drawdown_pct }}"
            }
          ]
        }
      },
      "name": "Supabase API Upsert",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.1,
      "position": [
        850,
        300
      ]
    }
  ],
  "connections": {
    "Schedule Trigger": {
      "main": [
        [
          {
            "node": "CoinGecko API",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "CoinGecko API": {
      "main": [
        [
          {
            "node": "Calculate Indicators",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Calculate Indicators": {
      "main": [
        [
          {
            "node": "Supabase API Upsert",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

About this workflow

Sentinel Bitcoin Sync (Hardcoded Auth). Uses httpRequest. Scheduled trigger; 4 nodes.

Source: https://github.com/abdullah-binmadhi/Bitcoin-Dashboard/blob/main/n8n/workflow_final.json — original creator credit. Request a take-down →

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