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send_shillings.py
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send_shillings.py
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from base64 import b64encode
from ecdsa import SigningKey
from ecdsa.util import sigencode_der
from uuid import UUID
import hashlib
import json
import requests
import uuid
import request_function
# Define function to send requests to API
def send_request_to_gateway(url, request_params, key_id, private_key_filename):
# Load private key.
with open(private_key_filename, "r") as keyfile:
signing_key = SigningKey.from_pem(keyfile.read())
# Encode request parameters as a JSON string.
request_body = json.dumps(request_params).encode("UTF-8")
# Generate the binary DER encoding of the signature.
binary_signature = signing_key.sign(
request_body, hashfunc=hashlib.sha256, sigencode=sigencode_der
)
# Render the Request-Signature header's value.
base64_signature = b64encode(binary_signature).decode("ascii")
global header_value
header_value = "ecdsa={0}".format(base64_signature)
# Set the required headers.
headers = {
"API-Version": "1.0",
"Content-Type": "application/json",
"Key-ID": key_id,
"Request-Signature": header_value,
}
# Send the request and read the response from the payment gateway.
response = requests.post(url, data=request_body, headers=headers)
result = response.json()
# Examine result and do whatever your application needs to do.
return result
# Generate random UUIDs for Request and Transaction IDs
# Convert them to strings to be JSON serialializable
request_id = str(uuid.uuid1())
transaction_id = str(uuid.uuid4())
# Set URL for sending payments
payment_url = 'https://payment-api.thesegovia.com/api/pay'
# Set private key variable
key_id = 'er157YrM1WL'
# Define input fields to be sent to target receipient via /api/pay
payment_payload = {
"clientId": "homework-test",
"requestId": request_id,
"transactions": [
{
"transactionId":transaction_id,
"provider": "autodetect",
"currency": "KES",
"recipientAccountId":"254999999999",
"amount": 1200,
"name":"Sum Baadi"
}
]
}
# Set private key filename as variable
private_key_file = "private-key.pem"
# Use request function to send payment
send_request_to_gateway(payment_url, payment_payload, key_id, private_key_file)
# Set input fields to be sent to /api/transactionstatus
status_url = 'https://payment-api.thesegovia.com/api/transactionstatus'
# Define fields to check against recently sent payment via /api/transactionstatus
status_payload = {
"clientId": "homework-test",
"requestId": request_id,
"transactionIds": [transaction_id]
}
# Use request function to check status
send_request_to_gateway(status_url, status_payload, key_id, private_key_file)