A decentralized price oracle for the Aergo blockchain that provides AERGO token prices in USD and KRW
- Off-chain nodes fetch AERGO prices from multiple exchanges (Coinbase, MEXC, Gate.io, Upbit, Bithumb, etc.)
- 3 authorized nodes submit prices per round; the contract uses the median to discard outliers
- Prices update on a 1% threshold change or at regular intervals (1-12 hours)
- Uses fee delegation so nodes don't need AERGO in their wallets
contract/ # Lua smart contract
price-oracle.lua
nodes/ # Off-chain price fetching nodes (Node.js)
aergo-price.js # Exchange API integrations
price-oracle.js # Main oracle node
| Function | Description |
|---|---|
get_aergo_price(currency) |
Get AERGO price in USD or KRW (payable) |
get_price_in_aergo(price_string) |
Convert "1.23 USD" to AERGO amount (payable) |
get_current_service_fee() |
Get the current service fee in AERGO |
submit_price(round, prices) |
Submit prices (authorized nodes only) |
Example of converting a price in USD to AERGO:
local price_in_usd = "1.23 USD" -- or stored on contract state
local oracle_fee = contract.call(price_oracle_address, "get_current_service_fee")
local price_in_aergo = contract.call.value(oracle_fee)(price_oracle_address, "get_price_in_aergo", price_in_usd)