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# frozen_string_literal: true
require "braintree"
require "date"
require "delegate"
require "dhall"
require "forwardable"
require "pg"
require "redis"
require "roda"
require "uri"
if ENV["RACK_ENV"] == "development"
require "pry-rescue"
use PryRescue::Rack
end
require_relative "lib/auto_top_up_repo"
require_relative "lib/three_d_secure_repo"
require_relative "lib/electrum"
require "sentry-ruby"
Sentry.init do |config|
config.traces_sample_rate = 1
end
use Sentry::Rack::CaptureExceptions
REDIS = Redis.new
PLANS = Dhall.load("env:PLANS").sync
BRAINTREE_CONFIG = Dhall.load("env:BRAINTREE_CONFIG").sync
ELECTRUM = Electrum.new(
**Dhall::Coder.load("env:ELECTRUM_CONFIG", transform_keys: :to_sym)
)
DB = PG.connect(dbname: "jmp")
DB.type_map_for_results = PG::BasicTypeMapForResults.new(DB)
DB.type_map_for_queries = PG::BasicTypeMapForQueries.new(DB)
class CreditCardGateway
class ErrorResult < StandardError
def self.for(result)
if result.verification&.status == "gateway_rejected" &&
result.verification&.gateway_rejection_reason == "cvv"
new("fieldInvalidForCvv")
else
new(result.message)
end
end
end
def initialize(jid, customer_id=nil)
@jid = jid
@customer_id = customer_id
@gateway = Braintree::Gateway.new(
environment: BRAINTREE_CONFIG[:environment].to_s,
merchant_id: BRAINTREE_CONFIG[:merchant_id].to_s,
public_key: BRAINTREE_CONFIG[:public_key].to_s,
private_key: BRAINTREE_CONFIG[:private_key].to_s
)
end
def check_customer_id(cid)
return cid unless ENV["RACK_ENV"] == "production"
raise "customer_id does not match" unless @customer_id == cid
cid
end
def customer_id
customer_id = REDIS.get(redis_key_jid)
return customer_id if check_customer_id(customer_id)
result = @gateway.customer.create
raise "Braintree customer create failed" unless result.success?
@customer_id = result.customer.id
save_customer_id!
end
def save_customer_id!
unless REDIS.set(redis_key_jid, @customer_id) == "OK"
raise "Saving new jid,customer to redis failed"
end
unless REDIS.set(redis_key_customer_id, @jid) == "OK"
raise "Saving new customer,jid to redis failed"
end
@customer_id
end
def customer_plan
name = DB.exec_params(<<~SQL, [customer_id]).first&.[]("plan_name")
SELECT plan_name FROM customer_plans WHERE customer_id=$1 LIMIT 1
SQL
PLANS.find { |plan| plan[:name].to_s == name }
end
def merchant_account
BRAINTREE_CONFIG[:merchant_accounts][customer_plan[:currency]]
end
def client_token
kwargs = {}
kwargs[:merchant_account_id] = merchant_account.to_s if merchant_account
@gateway.client_token.generate(customer_id: customer_id, **kwargs)
end
def payment_methods?
!@gateway.customer.find(customer_id).payment_methods.empty?
end
def default_method(nonce)
result = @gateway.payment_method.create(
customer_id: customer_id,
payment_method_nonce: nonce,
options: {
verify_card: true,
make_default: true
}
)
raise ErrorResult.for(result) unless result.success?
result
end
def remove_method(token)
@gateway.payment_method.delete(token)
end
protected
def redis_key_jid
"jmp_customer_id-#{@jid}"
end
def redis_key_customer_id
"jmp_customer_jid-#{@customer_id}"
end
end
class UnknownTransactions
def self.from(customer_id, address, tx_hashes)
self.for(
customer_id,
fetch_rows_for(address, tx_hashes).map { |row|
row["transaction_id"]
}
)
end
def self.fetch_rows_for(address, tx_hashes)
values = tx_hashes.map { |tx_hash|
"('#{DB.escape_string(tx_hash)}/#{DB.escape_string(address)}')"
}
return [] if values.empty?
DB.exec_params(<<-SQL)
SELECT transaction_id FROM
(VALUES #{values.join(',')}) AS t(transaction_id)
LEFT JOIN transactions USING (transaction_id)
WHERE transactions.transaction_id IS NULL
SQL
end
def self.for(customer_id, transaction_ids)
transaction_ids.empty? ? None.new : new(customer_id, transaction_ids)
end
def initialize(customer_id, transaction_ids)
@customer_id = customer_id
@transaction_ids = transaction_ids
end
def enqueue!
REDIS.hset(
"pending_btc_transactions",
*@transaction_ids.flat_map { |txid| [txid, @customer_id] }
)
end
class None
def enqueue!; end
end
end
class JmpPay < Roda
SENTRY_DSN = ENV["SENTRY_DSN"] && URI(ENV["SENTRY_DSN"])
plugin :render, engine: "slim"
plugin :common_logger, $stdout
extend Forwardable
def_delegators :request, :params
def redis_key_btc_addresses
"jmp_customer_btc_addresses-#{params['customer_id']}"
end
def verify_address_customer_id(r)
return if REDIS.sismember(redis_key_btc_addresses, params["address"])
warn "Address and customer_id do not match"
r.halt([
403,
{ "Content-Type" => "text/plain" },
"Address and customer_id do not match"
])
end
route do |r|
r.on "electrum_notify" do
verify_address_customer_id(r)
UnknownTransactions.from(
params["customer_id"],
params["address"],
ELECTRUM
.getaddresshistory(params["address"])
.map { |item| item["tx_hash"] }
).enqueue!
"OK"
end
r.on :jid do |jid|
Sentry.set_user(id: params["customer_id"], jid: jid)
gateway = CreditCardGateway.new(jid, params["customer_id"])
topup = AutoTopUpRepo.new
r.on "credit_cards" do
r.get do
view(
"credit_cards",
locals: {
token: gateway.client_token,
customer_id: gateway.customer_id,
auto_top_up: topup.find(gateway.customer_id) ||
(gateway.payment_methods? ? "" : "15")
}
)
end
r.post do
result = gateway.default_method(params["braintree_nonce"])
ThreeDSecureRepo.new.put_from_payment_method(
gateway.customer_id,
result.payment_method
)
topup.put(
gateway.customer_id,
params["auto_top_up_amount"].to_i
)
"OK"
rescue ThreeDSecureRepo::Failed
gateway.remove_method($!.message)
response.status = 400
"hostedFieldsFieldsInvalidError"
rescue CreditCardGateway::ErrorResult
response.status = 400
$!.message
end
end
end
end
end
run JmpPay.freeze.app