Prediction Market Smart Contact on Solana Network

You can reference this Solana Program script to develope the prediction market

1. Features

• Initialize Program: Admin sets the configuration status of the program.
• Create Market: Users can create a new market.
• Add Liquidity: Users can add liquidity to an existing market.
• Withdraw Liquidity: Users can remove their liquidity from the market.
• Swap SOL for Token: Users can swap SOL for tokens within the market.
• Resolution: When the market closes, the winner receives the reward.

2. How to work?

Prerequites

Install Rust, Solana, and AVM: https://solana.com/docs/intro/installation Remember to install anchor v0.30.1.

Build and Deploy the program

[provider]
cluster = "<DEVNET_RPC>"

anchor build
anchor deploy

CLI Test

function programCommand(name: string) {
  return program
    .command(name)
    .option(
      //  mainnet-beta, testnet, devnet
      "-e, --env <string>",
      "Solana cluster env name",
      "devnet"
    )
    .option(
      "-r, --rpc <string>",
      "Solana cluster RPC name",
      "devnet rpc url"
    )
    .option(
      "-k, --keypair <string>",
      "Solana wallet Keypair Path",
      "./keys/*.json"               //*.json: Your Keypair.json
    );
}

Initialize program: Admin sets the configuration status of the program.

yarn script config

Create market: Users can create a new market.

yarn script market

Add liquidity: Users can add liquidity to an existing market.

yarn script addlp -y <TOKEN_YES_MINT_Addy> -n <TOKEN_NO_MINT_Addy> -a <SOL_LAMPORT_AMOUNT>

TOKEN_YES_MINT_Addy: Yes token address
TOKEN_NO_MINT_Addy: No token address
SOL_LAMPORT_AMOUNT: SOL_AMOUNT * LAMPORTS_PER_SOL

Withdraw liquidity: Users can remove their liquidity from the market.

yarn script withdraw -y <TOKEN_YES_MINT_Addy> -n <TOKEN_NO_MINT_Addy> -a <SOL_LAMPORT_AMOUNT>

TOKEN_YES_MINT_Addy: Yes token address
TOKEN_NO_MINT_Addy: No token address
SOL_LAMPORT_AMOUNT: SOL_AMOUNT * LAMPORTS_PER_SOL

Swap SOL for token: Users can swap SOL for tokens within the market.

yarn script swap -y <TOKEN_YES_MINT_Addy> -n <TOKEN_NO_MINT_Addy> -a <SOL_LAMPORT_AMOUNT> -s <SWAP_DIRECTION> -t <TOKEN_TYPE>

TOKEN_YES_MINT_Addy: Yes token address
TOKEN_NO_MINT_Addy: No token address
SOL_LAMPORT_AMOUNT: SOL_AMOUNT * LAMPORTS_PER_SOL
SWAP_DIRECTION: if 0 for buy and if 1 for sell
TOKEN_TYPE: if 0 for No and if 1 for Yes.

Resolution: When the market closes, the winner receives the reward.

yarn script resolution -y <TOKEN_YES_MINT_Addy> -n <TOKEN_NO_MINT_Addy>

TOKEN_YES_MINT_Addy: Yes token address
TOKEN_NO_MINT_Addy: No token address

3. Operation Description

Add liquidity Operation

Users can add liquidity to the specific market before the market resolution. Each liquidity provider can get the fees based on his share in each market.

The platform gets 1.2% as a transaction fee in each market when users trade.

Here 1% goes to the treasury wallet, and 0.2% of the transaction fee will go to liquidity providers in proportion to the yield they’re providing.(The user can get fees from 0.2% of trade fees according to his share.)

Withdraw Liquidity Operation

Users can withdraw their liquidity at any time they want. This operation must be done before the market resolution

Market Resolution Operation

When the market is closed, the winner receives the reward. The formula to calculate the rewards is like the following

Rewards = WIN_TOKEN(YES TOKEN or NO TOKEN) balance * 0.01 SOL

4. Contact

Telegram - @idioRusty