# Diagrams

## Contract Architecture

Architecture of all smart contracts

<figure><img src="/files/N6htflVhVYChyPxfRwbQ" alt=""><figcaption></figcaption></figure>

## Scenarios

A collection of scenarios to help you understand how Isle Finance works from end to end

### Borrowing

#### Seller mints receivables NFT

{% @mermaid/diagram content="flowchart LR;
S((Seller))
R\[Receivables]
S -- "mintReceivable" --> R
R -- "transferReceivable" --> S" %}

#### Buyer requests for a loan to be created for the receivable

{% @mermaid/diagram content="flowchart LR;
B((Buyer))
LM\[LoanManager]
B -- "requestLoan" --> LM" %}

#### Pool Admin funds loan

{% @mermaid/diagram content="flowchart LR;
PM((PoolAdmin))
PC\[PoolConfigurator]
LM\[LoanManager]
P\[Pool]
PM -- "fundLoan" --> LM
LM -- "requestFunds" --> PC
PC -- "transferFrom" --> P
P -- "transferFunds" --> LM" %}

#### Seller withdraws funds by submitting the invoice

{% @mermaid/diagram content="flowchart LR
S((Seller))
LM((LoanManager))
S -- "withdrawFunds" --> LM
S -- "transferReceivables" --> LM
LM -- "transferFunds" --> S
" %}

#### Buyer repays loan

{% @mermaid/diagram content="flowchart LR
B((Buyer))
LM\[LoanManager]
TV\[Treasury Vault]
PA((Pool Admin))
P\[Pool]
B -- "repayLoan" --> LM
B -- "transferFunds" --> LM
LM -- "transferFunds" --> PA
LM -- "transferFunds" --> P
LM -- "transferFunds" --> TV" %}

### Lending

#### Lender deposits funds

{% @mermaid/diagram content="flowchart LR
LP((Lender))
P\[Pool]
LP -- "deposit" --> P
LP -- "transferFunds" --> P
P -- "transferShares" --> LP" %}

#### Lender requests redemption

{% @mermaid/diagram content="flowchart LR
LP((Lender))
P\[Pool]
PC\[PoolConfigurator]
WM\[WithdrawalManager]
LP -- "requestRedeem" --> P
P -- "requestRedeem" --> PC
PC -- "addShares" --> WM
LP -- "transferShares" --> WM" %}

#### Lender redeems funds

{% @mermaid/diagram content="flowchart LR
LP((Lender))
P\[Pool]
PC\[PoolConfigurator]
WM\[WithdrawalManager]
LP -- "redeem" --> P
P -- "processRedeem" --> PC
PC -- "processExit" --> WM
P -- "transferFunds" --> LP" %}

#### Lender remove redemption request

{% @mermaid/diagram content="flowchart LR
LP((Lender))
P\[Pool]
PC\[PoolConfigurator]
WM\[WithdrawalManager]
LP -- "removeShares" --> P
P -- "removeShares" --> PC
PC -- "removeShares" --> WM
WM -- "transferShares" --> LP" %}

### Pool Configuration

{% hint style="info" %}
There could be multiple sellers, but only a single buyer for a pool.
{% endhint %}

{% @mermaid/diagram content="flowchart LR;
PA((Pool Admin))
PC\[Pool Configurator]
PA -- "setBuyer" --> PC
PA -- "setValidSeller" --> PC
PA -- "setValidLender" --> PC
PA -- "setOpenToPublic" --> PC
PA -- "setAdminFee" --> PC
" %}

{% @mermaid/diagram content="flowchart LR
GV((Governor))
PC\[Pool Configurator]
GV -- "setPoolLimit" --> PC
GV -- "setMaxCoverLiquidation" --> PC
GV -- "setMinCover" --> PC" %}


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