feat: add sequance for ethereum service

[rickliujh]

ETHEREUM WATCHER API SPEC

[POST] /ews/v1/gas-report

request body:

{
    "target": {
        "type": "market-transactions", // type of the target
        "address": "0xdsfjl3j3214jljfdklj1lkjkl24", // collection address
        "tokenId": "1234", // tokenId for the specific collection address (aka collection/contract address)
        "markets": ["seaport"], // reports from which markets should be included
        "network": "mainnet" // ethereum network
    },
    "args": {
        "pushNotification": true, // specify whether push notification is needed
        "timeout": 60 // in seconds, this field is mendatory when pushNotification is set to true
    }
}

response:

{
    "id": "ea79904d-11ac-499e-9d28-71aac784c5ee",
    "target": {
        "type": "market-transactions", // type of the target
        "address": "0xdsfjl3j3214jljfdklj1lkjkl24", // collection address
        "tokenId": "1234", // tokenId for the specific collection address (aka collection/contract address)
        "markets": ["seaport"], // reports from which markets should be included
        "network": "mainnet" // ethereum network
    },
    "gasReport": {
        "timestamp": 1702230377, // timestamp of transaction of present gas fee report
        "gasLimit": "123", // bigint, could be null
        "gasPrice": "123", // bigint, could be null
        "maxPriorityFeePerGas": "123", // bigint required 
        "maxFeePerGas": "123", // bigint, required 
        "baseFee": "123", // bigint, required
    },
    "pushNotification": true // should be true if requested
}

[DELETE] /ews/v1/gas-report/{id}

request body:

NAN

response:

A successful response MUST be 200 (OK) if the server response includes a message body,
202 (Accepted) if the DELETE action has not yet been performed, or 204 (No content) if the DELETE action has been completed but the response does not have a message body

[WS]

event body:

{
    "id": "ea79904d-11ac-499e-9d28-71aac784c5ee",
    "eventId": "45b6712e-01ef-4781-a0e1-49109ba32363",
    "target": {
        "type": "market-transactions", // type of the target
        "address": "0xdsfjl3j3214jljfdklj1lkjkl24", // collection address
        "tokenId": "1234", // tokenId for the specific collection address (aka collection/contract address)
        "markets": ["seaport"], // reports from which markets should be included
        "network": "mainnet" // ethereum network
    },
    "gasReport": {
        "timestamp": 1702230377,
        "gasLimit": "123", // bigint, could be null
        "gasPrice": "123", // bigint, could be null
        "maxPriorityFeePerGas": "123", // bigint required 
        "maxFeePerGas": "123", // bigint, required 
        "baseFee": "123", // bigint, required
    },
    "pushNotification": true // should be true if requested
}

[rickliujh]

[rickliujh]

@nnmax target field in request and response has been updated.