def topup(self, api_endpoint, to, amount=None, skip_confirmation=True):
"""
Send a small amount of native currency to the specified wallet to handle gas fees. Return a status flag of success or fail and the native transaction data.
"""
msg = ""
try:
# Connect to the api_endpoint
client = Client(api_endpoint)
msg += "Initialized client"
# List accounts
sender_account = Account(self.private_key)
dest_account = PublicKey(to)
msg += " | Gathered accounts"
# List signers
signers = [sender_account]
# Start transaction
tx = Transaction()
# Determine the amount to send
try:
if amount is None:
min_rent_reseponse = client.get_minimum_balance_for_rent_exemption(
ACCOUNT_LAYOUT.sizeof())
lamports = min_rent_reseponse["result"]
else:
lamports = int(amount)
msg += f" | Fetched lamports: {lamports * 1e-9} SOL"
except Exception as e:
msg += " | ERROR: couldn't process lamports"
raise (e)
# Generate transaction
transfer_ix = transfer(
TransferParams(from_pubkey=sender_account.public_key(),
to_pubkey=dest_account,
lamports=lamports))
tx = tx.add(transfer_ix)
msg += f" | Transferring funds"
# Send request
try:
response = client.send_transaction(
tx,
*signers,
opts=types.TxOpts(skip_confirmation=skip_confirmation))
return json.dumps({
'status':
HTTPStatus.OK,
'msg':
f"Successfully sent {lamports * 1e-9} SOL to {to}",
'tx':
response.get('result') if skip_confirmation else
response['result']['transaction']['signatures'],
})
except Exception as e:
msg += f" | ERROR: Encountered exception while attempting to send transaction: {e}"
raise (e)
except Exception as e:
return json.dumps({
'status': HTTPStatus.BAD_REQUEST,
'msg': msg,
})
def get_min_balance_rent_for_exempt_for_mint(conn: Client) -> int:
"""Get the minimum balance for the mint to be rent exempt.
:param conn: RPC connection to a solana cluster.
:return: Number of lamports required.
"""
resp = conn.get_minimum_balance_for_rent_exemption(MINT_LAYOUT.sizeof())
return resp["result"]
def get_min_balance_rent_for_exempt_for_multisig(conn: Client) -> int:
"""Get the minimum balance for the multisig to be rent exempt.
Args:
conn: RPC connection to a solana cluster.
Return: Number of lamports required.
"""
resp = conn.get_minimum_balance_for_rent_exemption(
MULTISIG_LAYOUT.sizeof())
return resp["result"]
def get_min_balance_rent_for_exempt_for_account(conn: Client) -> int:
"""Get the minimum balance for the account to be rent exempt.
Args:
conn: RPC connection to a solana cluster.
Returns:
Number of lamports required.
"""
resp = conn.get_minimum_balance_for_rent_exemption(
ACCOUNT_LAYOUT.sizeof())
return resp["result"]
