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Weather skills

The AEA weather skills demonstrate an interaction between two AEAs.

  • The provider of weather data (the weather station).
  • The seller of weather data (the weather client).

Prerequisites

Make sure you have the latest aea version.

aea --version

If not, update with the following.

pip install aea[all] --force --no-cache-dir

Demo preliminaries

Follow the Preliminaries and Installation instructions here.

Download the packages and scripts directories. 

svn export https://github.com/fetchai/agents-aea.git/trunk/packages
svn export https://github.com/fetchai/agents-aea.git/trunk/scripts

Launch an OEF node

In a separate terminal, launch a local OEF node (for search and discovery). 

python scripts/oef/launch.py -c ./scripts/oef/launch_config.json

Keep it running for all the following demos.

Demo 1: no ledger payment

The AEAs negotiate and then transfer the data. No payment takes place. This demo serves as a demonstration of the negotiation steps.

Create the weather station AEA

In the root directory, create the weather station AEA. 

aea create my_weather_station

Add the weather station skill

cd my_weather_station
aea add skill weather_station

Run the weather station AEA

aea run

Create the weather client AEA

In a new terminal window, return to the root directory and create the weather client AEA. 

aea create my_weather_client

Add the weather client skill

cd my_weather_client
aea add skill weather_client

Run the weather client AEA

aea run

Observe the logs of both AEAs

Weather station logs

Weather client logs

Delete the AEAs

When you're done, go up a level and delete the AEAs.

cd ..
aea delete my_weather_station
aea delete my_weather_client

Demo 2: Fetch.ai ledger payment

A demo to run the same scenario but with a true ledger transaction on Fetch.ai testnet. This demo assumes the weather client trusts the weather station to send the weather data upon successful payment.

Create the weather station (ledger version)

Create the AEA that will provide weather measurements.

aea create my_weather_station 
cd my_weather_station
aea add skill weather_station_ledger

Create the weather client (ledger version)

In another terminal, create the AEA that will query the weather station.

aea create my_weather_client 
cd my_weather_client 
aea add skill weather_client_ledger

Additionally, create the private key for the weather client AEA. 

aea generate-key fetchai

Update the AEA configs

Both in weather_station/aea-config.yaml and weather_client/aea-config.yaml, replace ledger_apis: [] with the following.

ledger_apis:
  - ledger_api:
      ledger: fetchai
      addr: alpha.fetch-ai.com
      port: 80

Fund the weather client AEA

Create some wealth for your weather client on the Fetch.ai testnet. (It takes a while). 

cd ..
python scripts/fetchai_wealth_generation.py --private-key weather_client/fet_private_key.txt --amount 10000000 --addr alpha.fetch-ai.com --port 80
cd my_weather_client

Run the AEAs

Run both AEAs from their respective terminals. 

aea run

You will see that the AEAs negotiate and then transact using the Fetch.ai testnet.

Delete the AEAs

When you're done, go up a level and delete the AEAs.

cd ..
aea delete my_weather_station
aea delete my_weather_client

Demo 3: Ethereum ledger payment

A demo to run the same scenario but with a true ledger transaction on the Ethereum Ropsten testnet. This demo assumes the weather client trusts the weather station to send the weather data upon successful payment.

Create the weather station (ledger version)

Create the AEA that will provide weather measurements.

aea create my_weather_station 
cd my_weather_station
aea add skill weather_station_ledger

Create the weather client (ledger version)

In another terminal, create the AEA that will query the weather station.

aea create my_weather_client 
cd my_weather_client 
aea add skill weather_client_ledger

Additionally, create the private key for the weather client AEA. 

aea generate-key ethereum

Update the AEA configs

Both in weather_station/aea-config.yaml and weather_client/aea-config.yaml, replace ledger_apis: [] with the following.

ledger_apis:
  - ledger_api:
      addr: https://ropsten.infura.io/v3/f00f7b3ba0e848ddbdc8941c527447fe
      ledger: ethereum
      port: 3

Update the skill configs

In the weather station skill config (my_weather_station/skills/weather_station_ledger/skill.yaml) under strategy, amend the currency_pbk and ledger_id as follows. 

currency_pbk: 'ETH'
ledger_id: 'ethereum'
Amend ledgers to the following. 
ledgers: ['ethereum']

In the weather client skill config (my_weather_client/skills/weather_client_ledger/skill.yaml) under strategy change the currency_pbk and ledger_id. 

max_buyer_tx_fee: 20000
currency_pbk: 'ETH'
ledger_id: 'ethereum'
Amend ledgers to the following. 
ledgers: ['ethereum']

Fund the weather client AEA

Create some wealth for your weather client on the Ethereum Ropsten test net.

Go to the MetaMask Faucet and request some test ETH for the account your weather client AEA is using (you need to first load your AEAs private key into MetaMask). Your private key is at weather_client/eth_private_key.txt.

Run the AEAs

Run both AEAs, from their respective terminals. 

aea run
You will see that the AEAs negotiate and then transact using the Ethereum testnet.

Delete the AEAs

When you're done, go up a level and delete the AEAs.

cd ..
aea delete my_weather_station
aea delete my_weather_client