Ether Eyes Snap：将来のガス代を予測

export const onTransaction: OnTransactionHandler = async ({ transaction }) => {
 let state: { notifToggle: boolean; urgency: number; lowEth: number };

 state = (await wallet.request({
   method: 'snap_manageState',
   params: ['get'],
 })) as { notifToggle: boolean; urgency: number; lowEth: number };

 if (!state) {
   state = {
     notifToggle,
     urgency,
     lowEth,
   };
 }

 let insights: any = {
   type: 'Gas Fee estimation',
 };

 if (
   !isObject(transaction) ||
   !hasProperty(transaction, 'data') ||
   typeof transaction.data !== 'string'
 ) {
   console.warn('unknown transaction type');
   return { insights };
 }

 const response = await fetch(`${MODEL_API_ENDPOINT}`, {
   method: 'get',
   headers: {
     'Content-Type': 'application/json',
   },
 });

 const currentData = await fetch(CURRENT_DATA_ENDPOINT, {
   method: 'get',
   headers: {
     'Content-Type': 'application/json',
   },
 });

 if (!response.ok) {
   throw new Error('API request failed');
 }

 const data = await response.json();
 const current = await currentData.json();

 state.lowEth = Math.min(data.low_30_minutes, data.low_60_minutes);

 await wallet.request({
   method: 'snap_manageState',
   params: ['update', state],
 });

 insights = {
   'Average Gas Limit': `Current value: ${current.avgGas}`,

   'Estimated current gas price': `Current value (Base + Priority): ${
     current.speeds[0].baseFee + current.speeds[0].maxPriorityFeePerGas
   } GWei; Base Fee: ${current.speeds[0].baseFee} GWei`,

   'Forecasted Avg Gas price (for the next 30 mins)': `
   Gas price within 30 minutes is expected to get as low as: ${data.low_30_minutes} GWei`,

   'Forecasted Avg Gas price (for the next 60 mins)': `Gas price within 60 minutes is expected to get as low as: ${Math.min(
     data.low_30_minutes,
     data.low_60_minutes,
   )} GWei`,

   'Expected savings in 30 mins (For average gas limit)': `
   ${
     current.avgGas *
     (current.speeds[0].baseFee +
       current.speeds[0].maxPriorityFeePerGas -
       data.low_30_minutes)
   } GWei`,

   'Expected savings in 60 mins (For average gas limit)': `${
     current.avgGas *
     (current.speeds[0].baseFee +
       current.speeds[0].maxPriorityFeePerGas -
       Math.min(data.low_30_minutes, data.low_60_minutes))
   } GWei
   `,
 };

 return { insights };
};
コピー

export const onCronjob: OnCronjobHandler = async ({ request }) => {
 switch (request.method) {
   case 'exampleMethodOne': {
     // get data from state whenever snap is invoked as snaps executions are ephemeral
     let state: { notifToggle: boolean; urgency: number; lowEth: number };

     state = (await wallet.request({
       method: 'snap_manageState',
       params: ['get'],
     })) as { notifToggle: boolean; urgency: number; lowEth: number };

     if (!state) {
       state = {
         notifToggle,
         urgency,
         lowEth,
       };
     }
     notifToggle = state.notifToggle;
     urgency = state.urgency;
     lowEth = state.lowEth;

     await wallet.request({
       method: 'snap_manageState',
       params: ['update', state],
     });

     console.log({ notifToggle });
     if (notifToggle) {
       const currentData = await fetch(CURRENT_DATA_ENDPOINT, {
         method: 'get',
         headers: {
           'Content-Type': 'application/json',
         },
       });
       const current = await currentData.json();
       if (Math.abs(current.speeds[0].baseFee - lowEth) < urgency / 38) {
         return wallet.request({
           method: 'snap_notify',
           params: [
             {
               type: 'native',
               message: `Gasfee is low! Pay now at ${current.speeds[0].baseFee} Gwei`,
             },
           ],
         });
       }
       return wallet.request({
         method: 'snap_notify',
         params: [
           {
             type: 'native',
             message: `Current gasfee is ${current.speeds[0].baseFee} Gwei`,
           },
         ],
       });
     }
     return 0; // basically do nothing
   }

   default:
     throw new Error('Method not found.');
 }
};
コピー

"endowment:cronjob": {
      "jobs": [
        {
          "expression": {
            "minute": "*/3",
            "hour": "*",
            "dayOfMonth": "*",
            "month": "*",
            "dayOfWeek": "*"
          },
          "request": {
            "method": "exampleMethodOne",
            "params": {}
          }
        }
      ]
    }
コピー

 export const onRpcRequest: OnRpcRequestHandler = async ({
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  origin,
  request,
}) => {
  switch (request.method) {
    // Other RPC methods here
    case 'set_urgency_35': {
      urgency = 35;

      let state: { notifToggle: boolean; urgency: number; lowEth: number };

      state = (await wallet.request({
        method: 'snap_manageState',
        params: ['get'],
      })) as { notifToggle: boolean; urgency: number; lowEth: number };

      if (!state) {
        state = {
          notifToggle,
          urgency: 35,
          lowEth,
        };
      }
      state.urgency = 35;

      await wallet.request({
        method: 'snap_manageState',
        params: ['update', state],
      });

      return urgency;
    }

    case 'set_urgency_60': {
      urgency = 60;

      let state: { notifToggle: boolean; urgency: number; lowEth: number };

      state = (await wallet.request({
        method: 'snap_manageState',
        params: ['get'],
      })) as { notifToggle: boolean; urgency: number; lowEth: number };

      if (!state) {
        state = {
          notifToggle,
          urgency: 60,
          lowEth,
        };
      }
      state.urgency = 60;

      await wallet.request({
        method: 'snap_manageState',
        params: ['update', state],
      });

      return urgency;
    }

    case 'set_urgency_90': {
      urgency = 90;

      let state: { notifToggle: boolean; urgency: number; lowEth: number };

      state = (await wallet.request({
        method: 'snap_manageState',
        params: ['get'],
      })) as { notifToggle: boolean; urgency: number; lowEth: number };

      if (!state) {
        state = {
          notifToggle,
          urgency: 90,
          lowEth,
        };
      }
      state.urgency = 90;

      await wallet.request({
        method: 'snap_manageState',
        params: ['update', state],
      });

      return urgency;
    }

    case 'set_urgency_100': {
      urgency = 100;

      let state: { notifToggle: boolean; urgency: number; lowEth: number };

      state = (await wallet.request({
        method: 'snap_manageState',
        params: ['get'],
      })) as { notifToggle: boolean; urgency: number; lowEth: number };

      if (!state) {
        state = {
          notifToggle,
          urgency: 100,
          lowEth,
        };
      }
      state.urgency = 100;

      await wallet.request({
        method: 'snap_manageState',
        params: ['update', state],
      });

      return urgency;
    }

    case 'call_api': {
      // get data from state whenever snap is invoked as snaps executions are ephemeral
      let state: { notifToggle: boolean; urgency: number; lowEth: number };

      state = (await wallet.request({
        method: 'snap_manageState',
        params: ['get'],
      })) as { notifToggle: boolean; urgency: number; lowEth: number };

      if (!state) {
        state = {
          notifToggle,
          urgency,
          lowEth,
        };
      }

      notifToggle = state.notifToggle;
      urgency = state.urgency;
      lowEth = state.lowEth;

      await wallet.request({
        method: 'snap_manageState',
        params: ['update', state],
      });

      console.log(
        `Called inside custom api call: notifToggle = ${notifToggle} and urgency = ${urgency}`,
      );
      const currentData = await fetch(CURRENT_DATA_ENDPOINT, {
        method: 'get',
        headers: {
          'Content-Type': 'application/json',
        },
      });
      const current = await currentData.json();
      if (Math.abs(current.speeds[0].baseFee - lowEth) < urgency / 38) {
        return wallet.request({
          method: 'snap_notify',
          params: [
            {
              type: 'native',
              message: `Gasfee is low! Pay now at ${current.speeds[0].baseFee} Gwei`,
            },
          ],
        });
      }
      return wallet.request({
        method: 'snap_notify',
        params: [
          {
            type: 'native',
            message: `Current gasfee is ${current.speeds[0].baseFee} Gwei`,
          },
        ],
      });
    }

    default: {
      throw new Error('Method not found.');
    }
  }
};
コピー

if (Math.abs(current.speeds[0].baseFee - lowEth) < urgency / 38) {
          return wallet.request({
            method: 'snap_notify',
            params: [
              {
                type: 'native',
                message: `Gasfee is low! Pay now at ${current.speeds[0].baseFee} Gwei`,
              },
            ],
          });
        }
コピー

export const onRpcRequest: OnRpcRequestHandler = async ({
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  origin,
  request,
}) => {
  switch (request.method) {
    case 'notif_toggle_true': {
      console.log('Notification toggled to true');
      notifToggle = true; // toggle the notification
      console.log({ notifToggle });

      let state: { notifToggle: boolean; urgency: number; lowEth: number };

      state = (await wallet.request({
        method: 'snap_manageState',
        params: ['get'],
      })) as { notifToggle: boolean; urgency: number; lowEth: number };

      if (!state) {
        state = {
          notifToggle: true,
          urgency,
          lowEth,
        };
      }
      state.notifToggle = true;

      await wallet.request({
        method: 'snap_manageState',
        params: ['update', state],
      });

      return notifToggle;
    }

    case 'notif_toggle_false': {
      console.log('Notification toggled to false');
      notifToggle = false; // toggle the notification
      console.log({ notifToggle });

      let state: { notifToggle: boolean; urgency: number; lowEth: number };

      state = (await wallet.request({
        method: 'snap_manageState',
        params: ['get'],
      })) as { notifToggle: boolean; urgency: number; lowEth: number };

      if (!state) {
        state = {
          notifToggle: false,
          urgency,
          lowEth,
        };
      }
      state.notifToggle = false;

      await wallet.request({
        method: 'snap_manageState',
        params: ['update', state],
      });

      return notifToggle;
    }

     default: {
      throw new Error('Method not found.');
    }
  }
}; 
コピー

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
import requests
import numpy as np
from statsforecast.models import AutoARIMA
import json

def get_timeseries():
    with open('key.json') as f:
        data = json.load(f)
        print(data)

    key = data['key']

    history_data = requests.get(
        'https://api.owlracle.info/v3/eth/history?apikey={}&candles=100&txfee=true'
        .format(key))
    history_data = history_data.json()

    low = []

    for obj in history_data:
        low.append(obj['gasPrice']['low'])

    low.reverse()

    return np.array(low)

def get_prediction():
    values = get_timeseries()
    model = AutoARIMA()
    predictions = model.forecast(values, 2)
    print("Pred: ", predictions)
    prediction_json = {
        'low_30_minutes': predictions['mean'][0],
        'low_60_minutes': predictions['mean'][1]
    }

    return prediction_json

app = FastAPI()

origins = [
    "*",
]

app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

@app.get("/")
async def root():
    pred = get_prediction()

    return pred
コピー