Oracle

Oracle

code

abi

network name:kovan chain id: 42

Interface

pragma solidity ^0.6.7;
interface Oracle {
    function getBandPrice(string symbol) external view returns (uint256);
    function getChainLinkPrice(string symbol) external view returns (uint256);
    function getTokenPrice(string symbol) external view returns (uint256);
    function getCirculSupplys(string symbol) external view returns (uint256);
}

The Oracle contract connects to two oracle platforms, BandProcotal, ChainLink. GetTokenPrice takes the average price of the three platforms in a 1:2 ratio.

Events

const { ethers } = require('ethers');
const provider = new ethers.providers.InfuraProvider('kovan');
let contract = new ethers.Contract(contract_address, abi, provider);

Methods(Read Contract)

1. Get Band Price

function getBandPrice(string sybmol) public view returns (uint256);

Get bandprotocol price

param	type	description
sybmol	string	ERC20 token name,like ETH

return	type	description
_prices	uint256	price

2. Get ChainLink Price

function getChainLinkPrice(string sybmol) public view returns (uint256)

Get ChainLink Price

param	type	description
sybmol	string	ERC20 token name,like ETH

return	type	description
_prices	uint256	price

3. Get Token Price

function getTokenPrice(string sybmol) external view returns (uint256 _price, uint8 _decimals)

Get two oracle prices at the same time and calculate the final price

param	type	description
sybmol	string	ERC20 token name,like ETH

return	type	description
prices	uint256	price

4. Get Circul Supplys

function getCirculSupplys(string sybmol) external view returns (uint256)

**Get the number of token issues, and the number of issues for contract record, which is not real-time **

param	type	description
sybmol	string	ERC20 token name,like ETH

return	type	description
amount	uint256	amount

Methods(Write Contract)

1. Set Weight

function setWeight( uint8 _chainLinkWeight, uint8 _bandWeight, uint8 _uniswapv3Weight) external;

Set oracle weight

param	type	description
_chainLinkWeight	uint8	chainlink weight
_bandWeight	uint8	band protocol weight
_uniswapv3Weight	uint8	uniswapv3 weight