Swap Contract Error [Operation exceeds max spread limit]

Blockchain
1

Hi All,

Having difficulty swapping bLuna to Luna via a Python script. I haven’t had issues doing the following:

  • Swapping Luna to UST
  • Swapping Luna for bLuna
  • Swapping bLuna for Luna on the test net

Any help would be much appreciated

This is my code:

from terra_sdk.client.lcd import LCDClient
from terra_sdk.core.market import MsgSwap
from terra_sdk.core.bank import MsgSend
from terra_sdk.client.lcd.api.tx import CreateTxOptions
from terra_sdk.core.wasm import MsgExecuteContract

# Import other stuff
import requests
import json

terra = LCDClient(
    chain_id="columbus-5", 
    url="https://lcd.terra.dev")
terra

# Create wallet
from terra_sdk.key.mnemonic import MnemonicKey

mk = MnemonicKey("my seed phrase")

# Initialize the wallet
wallet = terra.wallet(mk)

# Astroport pair address
bLuna_Luna_Pair_Addresses = "terra1j66jatn3k50hjtg2xemnjm8s7y8dws9xqa5y8w"
bLuna_contract = "terra1kc87mu460fwkqte29rquh4hc20m54fxwtsx7gp"

def Swap_bLuna_for_Luna(bluna_to_be_swapped1):

    send_Swap_bLuna_for_Luna = (
        MsgExecuteContract(
            sender=mk.acc_address,
            contract=bLuna_contract,
            execute_msg={
                "send": {
                    "msg": "eyJzd2FwIjp7Im1heF9zcHJlYWQiOiIwLjAwNSJ9fQ==",  #'{"swap":{"max_spread":"0.005"}}' converted from json to Base64. Refer to https://docs.terraswap.io/docs/howto/swap/
                     "amount": str(bluna_to_be_swapped1),
                    "contract": "terra1j66jatn3k50hjtg2xemnjm8s7y8dws9xqa5y8w"
                }
            },
        ),
    )

    # Send tx
    tx_Swap_bLuna_for_Luna = wallet.create_and_sign_tx(
        CreateTxOptions(
        send_Swap_bLuna_for_Luna   
        )
    )

    result_Swap_bLuna_for_Luna = terra.tx.broadcast(tx_Swap_bLuna_for_Luna)
    print(result_Swap_bLuna_for_Luna.txhash)

Swap_bLuna_for_Luna(100000)

This is the error message:
“Status 400 - failed to execute message; message index: 0: dispatch: Operation exceeds max spread limit: execute wasm contract failed: invalid request”

2

Try changing the max spread parameter , no idea what the spreads are on the test net amms maybe try 5% {“swap”:{“max_spread”:“0.05”}}’

3

Well that seems to be an easy fix, thank you!

Also, I believe inputting the spread is an optional argument? So I could change the message to {“swap”: {}} (in Base64 equivalent) without any issues beyond spread not being considered?

4

That seems unnecessarily dangerous .