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Update fiat amount handling in models and transaction processor: Modified models to store fiat amounts in centavos for precision. Adjusted transaction processing logic to calculate and display fiat values in centavos, ensuring consistency across the application. Enhanced comments for clarity on the new storage format.

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padreug 2025-07-05 14:58:38 +02:00
parent 7af0e47d48
commit e222922a6a
2 changed files with 17 additions and 14 deletions
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8
models.py
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@ -62,7 +62,7 @@ class UpdateDepositStatusData(BaseModel):
class CreateDcaPaymentData(BaseModel):
client_id: str
amount_sats: int
amount_fiat: int
amount_fiat: int # Stored in centavos (GTQ * 100) for precision
exchange_rate: float
transaction_type: str # 'flow', 'fixed', 'manual', 'commission'
lamassu_transaction_id: Optional[str] = None
@ -74,7 +74,7 @@ class DcaPayment(BaseModel):
id: str
client_id: str
amount_sats: int
amount_fiat: int
amount_fiat: int # Stored in centavos (GTQ * 100) for precision
exchange_rate: float
transaction_type: str
lamassu_transaction_id: Optional[str]
@ -96,7 +96,7 @@ class ClientBalanceSummary(BaseModel):
# Transaction Processing Models
class LamassuTransaction(BaseModel):
transaction_id: str
amount_fiat: int
amount_fiat: int # Stored in centavos (GTQ * 100) for precision
amount_crypto: int
exchange_rate: float
transaction_type: str # 'cash_in' or 'cash_out'
@ -107,7 +107,7 @@ class LamassuTransaction(BaseModel):
# Lamassu Transaction Storage Models
class CreateLamassuTransactionData(BaseModel):
lamassu_transaction_id: str
fiat_amount: int
fiat_amount: int # Stored in centavos (GTQ * 100) for precision
crypto_amount: int
commission_percentage: float
discount: float = 0.0

23
transaction_processor.py
View file

@ -714,9 +714,9 @@ class LamassuTransactionProcessor:
# Calculate client's share of the base crypto (after commission)
client_sats_amount = int(base_crypto_atoms * proportion)
# Calculate equivalent fiat value for tracking purposes
# TODO: make client_fiat_amount float with 2 decimal presicion
client_fiat_amount = int(client_sats_amount / exchange_rate) if exchange_rate > 0 else 0
# Calculate equivalent fiat value in centavos for tracking purposes (industry standard)
# Store as centavos to maintain precision and avoid floating-point errors
client_fiat_amount = round(client_sats_amount * 100 / exchange_rate) if exchange_rate > 0 else 0
distributions[client_id] = {
"fiat_amount": client_fiat_amount,
@ -724,7 +724,7 @@ class LamassuTransactionProcessor:
"exchange_rate": exchange_rate
}
logger.info(f"Client {client_id[:8]}... gets {client_sats_amount} sats (≈{client_fiat_amount} fiat units, {proportion:.2%} share)")
logger.info(f"Client {client_id[:8]}... gets {client_sats_amount} sats (≈{client_fiat_amount/100:.2f} GTQ, {proportion:.2%} share)")
return distributions
@ -759,7 +759,7 @@ class LamassuTransactionProcessor:
payment_data = CreateDcaPaymentData(
client_id=client_id,
amount_sats=distribution["sats_amount"],
amount_fiat=distribution["fiat_amount"],
amount_fiat=distribution["fiat_amount"], # Still store centavos in DB
exchange_rate=distribution["exchange_rate"],
transaction_type="flow",
lamassu_transaction_id=transaction_id,
@ -802,16 +802,19 @@ class LamassuTransactionProcessor:
return False
# Create descriptive memo with DCA metrics
fiat_amount = distribution.get("fiat_amount", 0)
fiat_amount_centavos = distribution.get("fiat_amount", 0)
exchange_rate = distribution.get("exchange_rate", 0)
# Convert centavos to GTQ for display
fiat_amount_gtq = fiat_amount_centavos / 100
# Calculate cost basis (fiat per BTC)
if exchange_rate > 0:
# exchange_rate is sats per fiat unit, so convert to fiat per BTC
cost_basis_per_btc = 100_000_000 / exchange_rate # 100M sats = 1 BTC
memo = f"DCA: {amount_sats:,} sats • {fiat_amount:,} GTQ • Cost basis: {cost_basis_per_btc:,.2f} GTQ/BTC"
memo = f"DCA: {amount_sats:,} sats • {fiat_amount_gtq:.2f} GTQ • Cost basis: {cost_basis_per_btc:,.2f} GTQ/BTC"
else:
memo = f"DCA: {amount_sats:,} sats • {fiat_amount:,} GTQ"
memo = f"DCA: {amount_sats:,} sats • {fiat_amount_gtq:.2f} GTQ"
# Create invoice in target wallet
extra={
@ -932,10 +935,10 @@ class LamassuTransactionProcessor:
# Calculate exchange rate
exchange_rate = base_crypto_atoms / fiat_amount if fiat_amount > 0 else 0
# Create transaction data
# Create transaction data (store fiat_amount in centavos for consistency)
transaction_data = CreateLamassuTransactionData(
lamassu_transaction_id=transaction["transaction_id"],
fiat_amount=fiat_amount,
fiat_amount=int(fiat_amount * 100), # Convert GTQ to centavos
crypto_amount=crypto_atoms,
commission_percentage=commission_percentage,
discount=discount,