See list of external-adapters:

https://github.com/smartcontractkit/external-adapters-js

https://docs.chain.link/docs/running-a-chainlink-node

ETH_URL=wss://rinkeby.infura.io/ws/v3/0834aab6765f4fcfbb7254e18e1cc212

create chainlink database

dc exec postgres psql -U postgres

create database chainlink

authorization & keystore

follow: https://docs.chain.link/docs/miscellaneous#config

need to configure node to be able to access ethereum

1. generate a geth wallet
2. make the geth wallet keystore file accessible within docker as keystore.json

geth wallet password: dockVsADx8yiV6Y6EsHiPE6fNVV8edVv

geth new account

0xca35A712d957D55BdB22B41272D268d711a117ee

• cp the generated wallet keystore file to var/data/chainlink/keystore.json
• import it into the node:

dc run chainlink local import \
  /chainlink/keystore.json

• request some fund from rinkeby faucet

some more config:

• chainlink login / password in: var/data/chainlink/.api
• geth wallet password in: var/data/chainlink/.password

admin interface

• accessible via port 6688

job

• create a job:
  • http://104.237.155.93:6688/jobs/new

{
  "initiators": [
    {
      "type": "web"
    }
  ],
  "tasks": [
    {
      "type": "HTTPGet",
      "confirmations": 0,
      "params": { "get": "https://bitstamp.net/api/ticker/" }
    },
    {
      "type": "JSONParse",
      "params": { "path": [ "last" ] }
    },
    {
      "type": "Multiply",
      "params": { "times": 100 }
    },
    {
      "type": "NoOp"
    }
  ],
  "startAt": null,
  "endAt": null,
  "minPayment": "1000000000000000000"
}

• startAt requires the task to be run after that time

• payment: 1 link

  • can just trigger from the job page, without paying anything

• different ways to trigger a job:

  • https://github.com/smartcontractkit/chainlink/blob/a7e39b428731edc278b455b47276e4f3b2eb6151/core/store/models/job_spec.go#L172-L194

add a bridge / external adapter

http://104.237.155.93:6688/bridges/new

https://docs.chain.link/docs/developers

• example adapter

https://github.com/smartcontractkit/external-adapters-js/blob/master/bravenewcoin/adapter.js

• helpers for validating input and returning output (kinda pointless)

https://www.npmjs.com/package/@chainlink/external-adapter

If the node has a value defined for the Bridge Response URL, the payload will include a "responseURL" field that can be used to update responses via PATCH requests:

• how do you define a bridge response URL?

• is there someway for the node to authenticate with the external adapter?

  • ya. looks like there is no way to configure that

{
  "initiators": [
    {
      "type": "web"
    }
  ],
  "tasks": [
    {
      "type": "now",
      "confirmations": 0
    },
    {
      "type": "NoOp"
    }
  ],
  "startAt": null,
  "endAt": null,
  "minPayment": "1000000000000000000"
}

curl -X POST -H "content-type: application/json" localhost:9779/chainlink/now -d '
{
  "id": "12341234",
  "data": null
}
'

binance websocket

go get -u github.com/hashrocket/ws

• 1m candle

ws wss://stream.binance.com:9443/ws/btcusdt@kline_1m

• book

ws wss://stream.binance.com:9443/ws/btcusdt@bookTicker

• autg?

questions

• what are confirmations for? different contexts:
  • bridge confirmation
  • incoming/outgoing confirmation
  • job confirmation
• the initiators are kinda limited... not sure if the request/response cycles of chainlink oracles fit the idea of "pumping price feed onto solana".
  • i think for solana what's interesting is really just streaming data onto it.
  • what's the latency of a job creation/completion cycle?
  • the price feed depends on fluxmonitor
    • how does the node monitor the price change? poll?
• i think i probably need to look into the idea of round/flux/incentive to better understand how it would make sense (and if it makes sense) to for chainlink oracles to pump price feed onto solana.
  • and how would you aggregate?
  • probably create a "events" external initiator or something
    • websocket listening to event from an external service that pumps triggering events into it.
      • super violent lol.