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Update 007_eMoney_integration.md

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Will Ruddick 2020-06-30 05:55:23 +00:00
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spec/007_eMoney_integration.md
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## Incoming Sarafu ##
When chama (group accounts) exchange Sarafu each month for National Currency we have to manually send them Mpesa.
When users exchange CICfor National Currency we have to manually send them Mpesa.
We would like to automate this.
## Outgoing Sarafu ##
@ -12,18 +12,42 @@ Configure - using our own system AfricasTalking API to automatically send Sarafu
- *white list* The chama (group accounts only) must only be able to cash out - using the exchange option to an Agent account
- *amount* The max cash out is the minimum of (30,000 Sarafu, half their balance, their total amount of outward trade volume to other users (standard transactions)
- *time* They can only cash out once per month
- *rate* The Sarafu to Mpesa rate should be a config variable set to 1.0 -> a 0% cash out fee. i.e. For 100 Sarafu you get 100 Mpesa. This rate will vary manual based on promotion periods and available Mpesa
- *rate* The Sarafu (and their community) to Mpesa rate should be calculated as follows:
- CIC_supply_b: Get the total CIC supply off **blockchain** - the amount of **CIC_burn**
- total_reserve_b: Get the total reserve off **blockchain** - the amount of **cash_out** we've gotten (in USD)
- CIC_burn_amount = whatever they have sent to exhange
The Reserve (xDAI) pulled out
> const reserveOut_xDAI = total_reserve_b * (Math.pow(1 + (-1 * CIC_burn) / CIC_supply_b, 1 / trr) - 1);
- Mpesa_out = reserveOut_xDAI **USD => KSH** rate
- reserve_given = reserve_out - CIC_created*fee (0.02)
- Simulate as if done on blockchain .... new_cic_supply_b = cic_supply_b - CIC_burn
- Simulate as if done on blockchain .... new_total_reserve_b = total_reserve_b - reserveOut_xDAI
### Outgoing Sarafu Rules ###
- *white list* Only users sending via paybill receive Sarafu. Non users receive a invitation to join Sarafu sms
- *amount* The max sarafu out is 20,000 Sarafu per user
- *white list* Only users sending via paybill receive Sarafu. Non users receive a invitation to join Sarafu sms (alert to admins there was a donation).
- *amount* The max sarafu out is 20,000 Sarafu per user, KYC_limit max, supply_max
- *time* No limit
- *rate* The Mpesa to Sarafu rate should be a config variable set to 1.2 -> a 20% cash in bonus. i.e. For 100 Mpesa you get 120 Sarafu. This rate will vary manual based on promotion periods and available Sarafu
- *rate* The Mpesa to Sarafu (and their community) rate should be calculated as follows:
- CIC_supply_b: Get the total CIC supply off **blockchain** + the amount of **CIC_given**
- total_reserve_b: Get the total reserve off **blockchain** + the amount of **cash_in** we've gotten (in USD)
- cash_in_amount = Mpesa_in **KSH -> USD** rate (what is the current USD <> KSH rate)
The amount cashed in = cash_in_amount
> const CIC_Created = cic_supply_b * (Math.pow(1 + cash_in_amount / total_reserve_b, trr) - 1);
- **CIC_given = CIC_Created - CIC_created*fee (0.02)**
- Simulate as if done on blockchain .... new_cic_supply_b = cic_supply_b + CIC_given
- Simulate as if done on blockchain .... new_total_reserve_b = total_reserve_b + cash_in_amount
### Security ###
- Balance alerts: The paybill from which Sarafu is sent needs to send a sms and email alert when low
- Balance alerts: On both Mpesa and CIC balances: The paybill from which Sarafu is sent needs to send a sms and email alert when low
- Failure alerts: If the API session fails an sms and email alert should be sent
- Reject on not enough Mpesa balance: If there is not enough Mpesa (on incoming Sarafu) the transaction should be rejected and an email sent to admin along with a SMS to admin and user (Sarafu should not be taken from user). (message should be visible also on mgmt platform txn view and user view and admin view).
- Reject on not enough Sarafu balance: If there is not enough Sarafu (on incoming Mpesa) the transaction should be rejected and an email sent to admin along with a SMS to admin and user (Mpesa should not be taken from user). (message should be visible also on mgmt platform txn view and user view and admin view).
@ -32,5 +56,5 @@ Configure - using our own system AfricasTalking API to automatically send Sarafu
- The account from which Sarafu is sent should be a Agent account
- The cash-out rules for a chama (minimum and time limit)
- Alert balance levels
- Rate: Mpesa to Sarafu
- Rate: Sarafu to Mpesa
- Fees: Mpesa to Sarafu
- Fees: Sarafu to Mpesa