xDAI vs MPESA floats

spec/007_eMoney_integration.md

@@ -4,6 +4,17 @@ We would like to automate this.
 
 ## Solution ##
 Configure - using our own system AfricasTalking API to automatically send Sarafu / Mpesa based on rules:
+- CIC - > Mpesa 
+   - CICs are converted to reserve on-chain and the xDAI is held in a GE account (xDAI Float)
+   - We send back an equivalent amount of Mpesa to the user from out MPESA float account
+- Mpesa -> CIC
+   - Mpesa are added to our float Mpesa account.
+   - xDAI from our xDAI float account is added to the reserve of the CIC (Home CIC of the user) and new CICs are minted
+   -  We send back the user an equivalent amount of CIC
+
+## Un -speced - todo ##
+- Define the credit clearing process
+
 
 ### Variables ###
  - blockchain_CIC_Supply = the total supply of the CIC on the blockchain
@@ -27,54 +38,45 @@ Configure - using our own system AfricasTalking API to automatically send Sarafu
  - Fees: Sarafu to Mpesa FeeCC2M = 2%
  - Fees: Sarafu to Mpesa FeeM2CC = 2%
  
-### Incoming Sarafu Rules - MPESA out ###
+### Incoming CIC Rules - MPESA out ###
  - *white list* The chama (group accounts only but eventually anyone) 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
  - *mpesa given* The amount of Mpesa given should be calculated as follows:
-    
+ - CIC_excahnge_amount = the amount of CIC the user wants to excahnge
 
 The Reserve (xDAI) pulled out
->    reserveOut_xDAI = CIC_reserve_b * (Math.pow(1 + (-1 * CIC_excahnge_amount) / CIC_supply_b, 1 / trr) - 1) --> this should be calculated as it is done on contract
-
-  -  Mpesa_out = reserveOut_xDAI **USD => KSH** rate 
+>    reserveOut_xDAI = the amount of xDAI pulled from the reserve on-chain
+  -  Mpesa_out = reserveOut_xDAI **USD => KSH** rate (this is from our MPESA float account)
   -  **Mpesa_given = Mpesa_out - Mpesa_out*S22M (fee) this is the amount of Mpesa sent to the user**
-  -  Update CIC variables on database: 
-     - total_CIC_recieved+= CIC_excahnge_amount
-     - total_CIC_Reserve_Sent+= reserveOut_xDAI
-     
+
 
 ### Outgoing Sarafu Rules - MPESA In ###
  - *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
  - *Mpesa_excahnge_amount* The amount of CIC given should be calculated as follows:
- - reserveIn_xDAI = Mpesa_excahnge_amount **KSH => USD** rate 
+ - reserveIn_xDAI = Mpesa_excahnge_amount **KSH => USD** rate (this will come out of the xDAI float account)
     
 The amount cashed in = cash_in_amount
 
->    CIC_Created = CIC_supply_b * (Math.pow(1 + reserveIn_xDAI / CIC_reserve_b, trr) - 1) --> this should be calculated as it is done on contract
+>    CIC_Created = the amount of CIC created on chain by adding the reserveIn_xDAI
    
   - **CIC_given = CIC_Created - CIC_created*FeeM2CC ()**
-  - 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
-  -  Update CIC variables on database: 
-     - total_CIC_sent+= CIC_excahnge_amount
-     - total_CIC_Reserve_recieved+= reserveIn_xDAI
   
-
 ### Exchange Rate ###
 
 When dislaying the SPOT price or excahnge rate to a user we should use the following formula:
-> Exchange Price = CIC_reserve_b / (CIC_supply_b * trr)
+> Exchange Price = CIC_reserve / (CIC_supply * trr)
 
 
 ### User Interface ###
 
 - When a user chooses to ``Redeem```:
    - They should enter the amount (limited to the max in their balance)
-   - They should get a confirmation Based on the above equations: 
-   - The user should be asked you will revice **Mpesa_given** for **CIC_excahnge_amount**: Please type your PIN to confirm
+   - They should get a confirmation Based on a quote from the blockchain in a SMS: 
+   - The user should be asked you will recieve **Mpesa_given** for **CIC_excahnge_amount** (note this is from blockchain and will change second by second) 
+   - Please type your PIN to confirm
    - The user should get a Mpesa responce for recieving the Mpesa
 
 - When a user chooses to ``Contribute```:
@@ -85,6 +87,8 @@ When dislaying the SPOT price or excahnge rate to a user we should use the follo
    - They will then get instructions on USSD as well as a SMS on how to send Mpesa or Bonga boints to our Lipa na Mpesa
 
 
+### Credit Clearing ###
+
 
 ### Security ###
  - 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