Solana: Example contract code for a bonding curve?

Solana Bonding Curve

==========================

Solana Bonding Curve, also known as SPAR Curve, is a new asset creation protocol introduced by Solana Labs. It allows for the efficient and secure creation of new assets by leveraging the power of bonding curves. In this article, we will look at some smart contract examples that you can use as a starting point to build your own Solana Bonding Curve.

What is a Bonding Curve?

————————-

A Bonding Curve is a type of liquidity protocol used in DeFi applications, including Solana Inter-Block Transactions (IBT). It allows for the creation of new assets by combining existing assets through liquidity swaps. A Bonding Curve is based on the idea of ​​​​“combining” two or more assets to create a new asset with properties that are different from either of the original assets.

Solana Bonding Curve Smart Contract Example

———————————————

One of the most well-known examples of Solana Bonding Curve is the SPL token swap contract, which allows users to exchange their SPARK (SPL’s native token) for SLP (Solana Token). This contract uses the bond curve to facilitate efficient asset creation and management.

Here is an example of a Solidity code snippet:

pragma solidity ^0.8.0;
contract SPLBondingCurve {
// Define the asset to be bonded
address public SPARK;
SLP public address;
// Define the bonding parameters
uint256 public bondLength; // Number of periods to wait before unbonding
uint256 public minPrice; // Minimum unbonding price
uint256 public maxPrice; // Maximum price for unbinding
uint256 public reserve1; // Reserve 1
uint256 public reserve2; // Reserve 2
// Initialize contracts with a specific asset
constructor (address _SPARK, address _SLP) {
SPARK = _BREAK;
SLP = _SLP;
// Set connection parameters to default values
connectionLength = 10; // Wait 10 periods before unbinding
minPrice = 1; // Minimum unbinding price: 1 USD
maxPrice = 1000; // Maximum unbinding price: 1000 USD
reserve1 = 50; // Reserve 1
reserve2 = 50; // Reserve 2
}
// Unbond a period of long bondLength
function unbind() public {
// Get current SPARK and SLP prices
uint256 priceSPARK = SPARK.getPrice();
uint256 priceSLP = SLP.get_price();
// Check if we can unbind with enough capital
request(priceSLP > minPrice && priceSLP < maxPrice, "Unbinding failed");
// Update reserves and prices
reserve1 -= priceSPARK;
reserve2 -= priceSLP;
// Calculate new SPARK and SLP prices
uint256 newSPARKPain = priceSPARK * (priceSLP / (priceSLP + reserve1));
uint256 newSLPPrice = priceSLP * (priceSPARK / (priceSPARK + reserve2));
// Update prices and reserves
SPARK.updatePrice(newSPARKPeak);
SLP.update_price(newSLPPrice);
// Check if we have successfully unlinked
Requirement(reserve1 > 0 && reserve2 > 0, "Unlink failed");
}
}

This contract uses a staking curve to create a new asset called SPARKL (SPL native token) with different properties from SPARK and SLP. The «unlink» function is used to unlink the bond length period, which allows for the creation of new assets.

Tips for creating your own staking curve

————————————

• Choose the right staking parameters: Choose values ​​​that match your use case and ensure that you can unlink with sufficient capital.

• Use a reliable liquidity provider

  : Make sure your liquidity provider is reliable and will return high prices so that the period is not limited.

• Monitor and adapt

  : Constantly monitor the prices of your assets and adjust the coupling parameters as needed.