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Swaps Atomic on Solana: a step-by-step guide
In today’s world of decentralized exchanges (Dexs), atomic swaps have emerged as a turning point for traders. An atomic exchange is a type of transaction that allows users to exchange two cryptocurrencies or token in a single atomic operation, guaranteeing total safety and minimizing the risk of errors. In this article, we will explore how to make an atomic exchange on Solana, focusing on the writing of a program that buys a token on Raydium, then sells it on an orca and reimbursed by the user if a mistake occurs during the sale.
What is an atomic exchange?
Before immersing yourself in detail, we quickly define what an atomic exchange is. An atomic exchange is a type of transaction that guarantees that a series of operations is performed as one, without leaving any state or intermediate risk. This is in contrast with traditional swaps, in which each operation is performed separately and errors can occur.
Choose a programming language
To implement an atomic exchange on Solana, you will have to choose a programming language. For this example, we will use Python, which has an excellent support for the API of the Solana node.
Ambient setting
First, make sure you have the following prerequisites installed:
- Node Solana: `
Solana installs Solana-Discord.py
- Python 3.7+ (with packets `
TypePy-Solana)
- A compatible wallet (eg Solana CLI)
Implementation of the atomic exchange
Here is a step-by-step guide for the implementation of an atomic exchange on Solana:
Passage 1: Set the wallet
Create a new wallet using the CLI Solana:
`Bash
Solana Keygen -Path Wallet.json
`
Generates a private key and memorize it inWallet.json. You can also use the default key.
Step 2: Define the functions
Define two functions that will be used to perform the atomic exchange:
- BuyTokenonraydium
: Buy a token on Raydium using Solana's CLI.
- SELLTOKENOCARCA
: sells a token on Orca using the CLI of Solana.
Here are the Python functions:
Python
Import Solana CLI
Def Buy_Token_on_raydium (Private_key, amount):
“” “Buy a token on Raydium.” “”
raydium = cli.solana_from_path (private_key.path)
Result = raydium.send_approve (
“Token Raydium program”,
{
“Program_id”: “Raydium-Token-Program”,
“amount”: {“type”: “uint8”, “value”: amount},
},
{“Wait_Time”: 2000},
wait for the program to finish
)
Return result
Def Sell_Token_on_Orca (Private_key, Amount):
“” “Sell a token on ORCA.” “”
ORCA = CLI.Solana_from_path (Private_key.path)
Result = ORCA.Send_Approve (
“Token Orca program”,
{
“Program_id”: “ORCA-TOKEN-PROGRAM”,
“amount”: {“type”: “uint8”, “value”: amount},
},
{“Wait_Time”: 2000},
wait for the program to finish
)
Return result
Def Atomic_Swap (Private_key, Amount):
“” “Perform an atomic exchange.” “”
Buy_result = buy_token_on_raydium (Private_key, amount)
Sell_result = Sell_Token_on_Orca (Private_key, Amount)
If buy_result.status! = “Ok” or Sell_result.status! = “Ok”:
Return {“Error”: “Error during the exchange”}
`
Step 3: Perform the atomic exchange
Now that you have defined the functions, you can perform the atomic exchange:
Python
Private_key = “Path/To/Private/Key”
Amount = 1000000
Replace with the desired token
Swap_result = Atomic_Swap (Private_key, amount)
Print (Swap_result)
prints the result of the exchange
`
Errors management
To manage errors during exchange, you can add control and recording of errors. Here is an updated implementation:
Python
Import Solana CLI
Def Buy_Token_on_raydium (Private_key, amount):
“” “Buy a token on Raydium.” “”
raydium = cli.solana_from_path (private_key.path)
Attempt:
Result = Raydium.
