Terra Classic Oracle Feeder

The Price Server/Feeder is an essential component in the Terra Classic chain. Validators are obligated to run this service and provide accurate currency prices. Consequently, they are rewarded for doing so — and penalized otherwise as well.
Below are the instructions to setup Oracle Price Feeder. There are two parts to it - a) Price Serverb) Oracle Feeder

I. Price Server

1. Install Prerequisites

1. Your validator node should already be configured.2. Node.js version 12 or later.
sudo apt install nodejs

2. Clone Code (from Terra.Rebels)

cd /home/<user>git clone https://github.com/terra-rebels/oracle-feeder.git
NOTE: Use Terra Rebels Git for this.

3. Update Configs

cd /home/<user>/oracle-feeder/price-server/configcp default-sample.js default.js
vi default.jsLeave these two providers which are FREE and delete the others. Update fallbackPriority as well.
fiatProvider: { fallbackPriority: ['exchangerate', 'bandprotocol'], bandprotocol: { // DKK is not supported for bandprotocol symbols: fiatSymbols.filter((v) => !v.includes('DKK') && !v.includes('PHP')), interval: 60 * 1000, timeout: 5000, // https://data.bandprotocol.com/ }, exchangerate: { symbols: fiatSymbols, interval: 60 * 1000, timeout: 5000, // https://exchangerate.host/ },

4. Install Node & NPM

cd /home/<user>/oracle-feeder/price-serversudo apt install nodejsnode --versionnode --version v12.22.9
npm install (NOT sudo apt install npm)npm start (Only to test, it will be set as a system service.)
NOTE: It did not work for the first time, so deleted the oracle-feeder and reran the same steps and the Price Feeder started working. Do run npm install and node.js install multiple times.

5. Setup as Service

cd /etc/systemd/systemsudo touch runPriceServer.servicesudo vim runPriceServer.service
[Unit]Description=Price DaemonAfter=network.target
[Service]Type=simpleUser=<user>WorkingDirectory=/home/<user>/oracle-feeder/price-serverExecStart=npm run startRestart=on=abort
[Install]WantedBy=multi-user.target

6. Start Price Feeder

sudo systemctl daemon-reloadsudo systemctl enable runPriceServersudo systemctl start runPriceServer
sudo systemctl status runPriceServer

II. Oracle Feeder

1. Add New Key

terrad keys add feeder
Save the mnemonics and the key.NOTE: Transfer some coins otherwise below step will fail with Key Not Found Error.

2. Register Oracle Feeder

terrad tx oracle set-feeder terra1c0mes3pcanse34rnuxctpdj92fdeeclsavn3z8 --from=TargetNodes --chain-id="columbus-5" --gas-prices "5.665uluna"
NOTE: The above set-feeder address is the ‘feeder’ address, NOT Validator address.

3. Update-Key

cd /home/<user>/oracle-feeder/feedernpm installnpm start update-keyNOTE: Provide password and feeder’s mnemonic

4. Downgrade terra.js

npm install @terra-money/terra.js@3.0.4npm list @terra-money/terra.js
<user>:~/oracle-feeder/feeder$ npm list @terra-money/terra.js@terra-money/oracle-feeder@2.0.3 /home/<user>/oracle-feeder/feeder└── @terra-money/terra.js@3.0.4
NOTE: It MUST be 3.0.4

5. Setup as Service

cd /etc/systemd/systemsudo touch runPriceOracle.servicesudo vim runPriceOracle.service
[Unit]Description=Price DaemonAfter=network.target
[Service]Type=simpleUser=<user>WorkingDirectory=/home/<user>/oracle-feeder/feederExecStart=npm start vote -- --source http://localhost:8532/latest --lcd http://localhost:1317/ --chain-id columbus-5 --validator <terravaloper address of Validator> --password "<Password of feeder>"Restart=on=abort
[Install]WantedBy=multi-user.target

6. Start Oracle Feeder

sudo systemctl daemon-reloadsudo systemctl enable runPriceOraclesudo systemctl start runPriceOracle

7. Status Check

sudo systemctl status terradsudo systemctl status runPriceServersudo systemctl status runPriceOracle

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