# Initialize Rust project structure
cargo new --lib decentralized_credit_network
cd decentralized_credit_network

# Add dependencies to Cargo.toml
echo '[dependencies]
substrate-frame-support = "4.0.0-dev"
substrate-frame-system = "4.0.0-dev"
parity-scale-codec = { version = "3.0.0", features = ["derive"] }
scale-info = { version = "2.0.0", features = ["derive"] }
serde = { version = "1.0", features = ["derive"] }
tokio = { version = "1.0", features = ["full"] }
libp2p = "0.53"
sqlx = { version = "0.7", features = ["runtime-tokio-rustls", "postgres"] }' >> Cargo.toml```

#### **1.2 Core Data Structures**

The core data structures define the essential elements of the credit network. The `CreditRequest` struct holds all the information related to a loan application. The `CreditPurpose` enum categorizes the reason for the loan, which is crucial for the credit assessment engine. The `CommunityBank` struct represents a local, community-focused financial institution within the network.

```rust
// src/types.rs
use parity_scale_codec::{Decode, Encode};
use scale_info::TypeInfo;
use serde::{Deserialize, Serialize};

// Assuming these types are defined elsewhere in the project
pub type AccountId = String;
pub type Balance = u128;
pub type Asset = String;
pub type Endorsement = String;
pub type BankId = String;
pub type BioregionId = String;
pub type TokenId = String;
pub type CommunityHealthMetrics = (); // Placeholder

#[derive(Clone, Debug, Encode, Decode, TypeInfo, Serialize, Deserialize)]
pub struct CreditRequest {
    pub borrower_id: AccountId,
    pub amount: Balance,
    pub purpose: CreditPurpose,
    pub collateral: Vec<Asset>,
    pub community_endorsements: Vec<Endorsement>,
    pub productive_impact_score: u32,
    pub timestamp: u64,
}

#[derive(Clone, Debug, Encode, Decode, TypeInfo, Serialize, Deserialize)]
pub enum CreditPurpose {
    ProductiveEnterprise(String),
    CreativeProject(String),
    CommunityInfrastructure(String),
    EcologicalRestoration(String),
    EducationalInitiative(String),
}

#[derive(Clone, Debug, Encode, Decode, TypeInfo, Serialize, Deserialize)]
pub struct CommunityBank {
    pub bank_id: BankId,
    pub bioregion: BioregionId,
    pub members: Vec<AccountId>,
    pub credit_pool: Balance,
    pub governance_token: TokenId,
    pub health_metrics: CommunityHealthMetrics,
}

// src/credit_assessment.rs
use std::collections::HashMap;
use crate::types::{CreditRequest, CreditPurpose, AccountId}; // Assuming types are in a `types` module

// Placeholder structs for demonstration
pub struct CommunityProfile;
pub struct ProductiveMetrics;
pub struct CreditScore {
    pub total_score: u32,
    pub risk_level: String,
    pub recommended_terms: String,
}

pub struct CreditAssessmentEngine {
    community_data: HashMap<AccountId, CommunityProfile>,
    productive_indicators: ProductiveMetrics,
}

impl CreditAssessmentEngine {
    pub fn assess_credit_worthiness(&self, request: &CreditRequest) -> CreditScore {
        let community_score = self.evaluate_community_standing(&request.borrower_id);
        let purpose_score = self.evaluate_productive_purpose(&request.purpose);
        let network_score = self.evaluate_network_effects(&request);

        CreditScore {
            total_score: (community_score + purpose_score + network_score) / 3,
            risk_level: self.calculate_risk_level(&request),
            recommended_terms: self.generate_terms(&request),
        }
    }

    fn evaluate_community_standing(&self, _borrower_id: &AccountId) -> u32 {
        // In a real implementation, this would involve complex logic
        // to assess the borrower's reputation and contributions to the community.
        80 // Placeholder value
    }

    fn evaluate_productive_purpose(&self, purpose: &CreditPurpose) -> u32 {
        match purpose {
            CreditPurpose::ProductiveEnterprise(_) => 85,
            CreditPurpose::CreativeProject(_) => 75,
            CreditPurpose::CommunityInfrastructure(_) => 95,
            CreditPurpose::EcologicalRestoration(_) => 90,
            CreditPurpose::EducationalInitiative(_) => 80,
        }
    }

    fn evaluate_network_effects(&self, _request: &CreditRequest) -> u32 {
        // This would assess the broader impact of the loan on the community network.
        85 // Placeholder value
    }

    fn calculate_risk_level(&self, _request: &CreditRequest) -> String {
        // Risk level would be determined based on the credit score and other factors.
        "Low".to_string()
    }

    fn generate_terms(&self, _request: &CreditRequest) -> String {
        // Loan terms would be generated based on the risk assessment.
        "Standard terms".to_string()
    }
}

// src/community_metrics.rs
#[derive(Clone, Debug, Default)]
pub struct CommunityHealthMetrics {
    pub economic_diversity: f64,
    pub resource_circulation: f64,
    pub cooperative_participation: f64,
    pub ecological_footprint: f64,
    pub knowledge_sharing_index: f64,
}

impl CommunityHealthMetrics {
    pub fn calculate_overall_health(&self) -> f64 {
        (self.economic_diversity * 0.2 +
         self.resource_circulation * 0.25 +
         self.cooperative_participation * 0.2 +
         self.ecological_footprint * 0.2 +
         self.knowledge_sharing_index * 0.15)
    }
}

// src/lending_protocol.rs
use substrate_frame_support::{
    decl_module, decl_storage, decl_event, decl_error,
    traits::{Get, Currency, ReservableCurrency},
};
use frame_system::ensure_signed;

// Assuming these types are defined in `crate::types`
use crate::types::{CreditRequest, CommunityBank, BankId};

pub type LoanId = u64; // Example type for LoanId
pub struct ActiveLoan; // Placeholder for ActiveLoan struct

pub trait Trait: frame_system::Trait {
    type Event: From<Event<Self>> + Into<<Self as frame_system::Trait>::Event>;
    type Currency: Currency<Self::AccountId> + ReservableCurrency<Self::AccountId>;
}

decl_storage! {
    trait Store for Module<T: Trait> as CreditCreation {
        CreditRequests get(fn credit_requests):
            map hasher(blake2_128_concat) T::Hash => Option<CreditRequest>;

        CommunityBanks get(fn community_banks):
            map hasher(blake2_128_concat) BankId => Option<CommunityBank>;

        ActiveLoans get(fn active_loans):
            map hasher(blake2_128_concat) LoanId => Option<ActiveLoan>;
    }
}

decl_event!(
    pub enum Event<T> where AccountId = <T as frame_system::Trait>::AccountId {
        CreditRequested(AccountId, u128, String),
        CreditApproved(AccountId, LoanId, u128),
        CommunityBankCreated(BankId, String),
        ResourcesRedistributed(BankId, u128),
    }
);

// src/resource_distribution.rs
use crate::types::{CommunityBank, Balance};

// Placeholder for the actual redistribution algorithm
pub enum RedistributionAlgorithm {
    Default,
}

pub struct ResourceDistributionEngine {
    redistribution_algorithm: RedistributionAlgorithm,
}

impl ResourceDistributionEngine {
    pub fn redistribute_based_on_health(&mut self, banks: &mut Vec<CommunityBank>) {
        banks.sort_by(|a, b| {
            // This is a placeholder for the actual health calculation
            // In a real implementation, you would call a method on health_metrics
            // b.health_metrics.calculate_overall_health()
            //     .partial_cmp(&a.health_metrics.calculate_overall_health())
            //     .unwrap()
            b.credit_pool.partial_cmp(&a.credit_pool).unwrap() // Simple sort by credit pool for now
        });

        let total_resources: Balance = banks.iter().map(|b| b.credit_pool).sum();
        let target_distribution = self.calculate_optimal_distribution(&banks, total_resources);

        self.execute_redistribution(banks, &target_distribution);
    }

    fn calculate_optimal_distribution(&self, _banks: &Vec<CommunityBank>, _total_resources: Balance) -> Vec<Balance> {
        // This would contain the logic for determining the optimal distribution
        vec![] // Placeholder
    }

    fn execute_redistribution(&self, _banks: &mut Vec<CommunityBank>, _target_distribution: &Vec<Balance>) {
        // This would execute the actual resource transfers
    }
}

# infrastructure/aws/main.tf
provider "aws" {
  region = var.aws_region
}

variable "aws_region" {
  default = "us-west-2"
}

variable "db_username" {
  default = "user"
}

variable "db_password" {
  sensitive = true
}

resource "aws_iam_role" "cluster" {
  name = "eks-cluster-role"
  assume_role_policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action = "sts:AssumeRole"
        Effect = "Allow"
        Principal = {
          Service = "eks.amazonaws.com"
        }
      },
    ]
  })
}

resource "aws_subnet" "private" {
  count = 2
  vpc_id = "vpc-12345" # Replace with your VPC ID
  cidr_block = "10.0.${count.index}.0/24"
}

resource "aws_eks_cluster" "credit_network" {
  name     = "decentralized-credit-network"
  role_arn = aws_iam_role.cluster.arn
  version  = "1.28"

  vpc_config {
    subnet_ids = aws_subnet.private[*].id
  }
}

resource "aws_security_group" "rds" {
    name = "rds-sg"
    vpc_id = "vpc-12345" # Replace with your VPC ID
}

resource "aws_db_subnet_group" "main" {
  name       = "main"
  subnet_ids = aws_subnet.private[*].id
}

resource "aws_rds_cluster" "community_data" {
  cluster_identifier      = "community-data-cluster"
  engine                 = "aurora-postgresql"
  engine_version         = "13.7"
  database_name          = "community_metrics"
  master_username        = var.db_username
  master_password        = var.db_password
  backup_retention_period = 7
  preferred_backup_window = "07:00-09:00"

  vpc_security_group_ids = [aws_security_group.rds.id]
  db_subnet_group_name   = aws_db_subnet_group.main.name
}

# k8s/credit-network-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: credit-network-node
spec:
  replicas: 5
  selector:
    matchLabels:
      app: credit-network-node
  template:
    metadata:
      labels:
        app: credit-network-node
    spec:
      containers:
      - name: substrate-node
        image: decentralized-credit/node:latest
        ports:
        - containerPort: 9944
        - containerPort: 9933
        - containerPort: 30333
        env:
        - name: RUST_LOG
          value: "info"
        resources:
          requests:
            memory: "2Gi"
            cpu: "1000m"
          limits:
            memory: "4Gi"
            cpu: "2000m"

// src/governance.rs
use std::collections::HashMap;
use crate::types::AccountId;

// Placeholder types
pub type ProposalId = u64;
pub enum Error { InvalidProposal }
pub struct Proposal;
pub struct VotingPower { pub credits: u64 }
pub struct VotingResult {
    pub proposal_id: ProposalId,
    pub support_level: f64,
    pub passed: bool,
}

pub struct CommunityGovernance {
    proposals: HashMap<ProposalId, Proposal>,
    voting_power: HashMap<AccountId, VotingPower>,
}

impl CommunityGovernance {
    pub fn submit_proposal(&mut self, proposal: Proposal) -> Result<ProposalId, Error> {
        if self.validate_proposal(&proposal) {
            let proposal_id = self.generate_proposal_id();
            self.proposals.insert(proposal_id, proposal);
            Ok(proposal_id)
        } else {
            Err(Error::InvalidProposal)
        }
    }

    pub fn execute_quadratic_voting(&self, proposal_id: ProposalId) -> VotingResult {
        let _proposal = self.proposals.get(&proposal_id).unwrap();
        let mut total_support = 0.0;

        for (_voter, power) in &self.voting_power {
            let vote_strength = (power.credits as f64).sqrt();
            total_support += vote_strength;
        }

        VotingResult {
            proposal_id,
            support_level: total_support,
            passed: total_support > self.get_passing_threshold(),
        }
    }

    fn validate_proposal(&self, _proposal: &Proposal) -> bool {
        // Logic to validate the proposal
        true
    }

    fn generate_proposal_id(&self) -> ProposalId {
        // Logic to generate a unique proposal ID
        0
    }

    fn get_passing_threshold(&self) -> f64 {
        // Logic to determine the passing threshold for a vote
        100.0
    }
}

// src/bioregional_integration.rs
use reqwest::Client;
use serde_json::Value;
use crate::types::BioregionId;

// Placeholder types
pub enum Error { NetworkError }
#[derive(Default)]
pub struct EconomicData {
    pub business_vitality: Value,
    pub ecological_indicators: Value,
    pub social_indicators: Value,
}
pub enum DataSourceType { LocalBusiness, EcologicalHealth, CommunityWellbeing }
pub struct DataSource { pub source_type: DataSourceType }

pub struct BioregionalIntegration {
    client: Client,
    local_data_sources: Vec<DataSource>,
}

impl BioregionalIntegration {
    pub async fn fetch_local_economic_data(&self, bioregion: &BioregionId) -> Result<EconomicData, Error> {
        let mut economic_data = EconomicData::default();

        for source in &self.local_data_sources {
            match source.source_type {
                DataSourceType::LocalBusiness => {
                    let business_data = self.fetch_business_health(bioregion).await?;
                    economic_data.business_vitality = business_data;
                },
                DataSourceType::EcologicalHealth => {
                    let eco_data = self.fetch_ecological_metrics(bioregion).await?;
                    economic_data.ecological_indicators = eco_data;
                },
                DataSourceType::CommunityWellbeing => {
                    let community_data = self.fetch_community_metrics(bioregion).await?;
                    economic_data.social_indicators = community_data;
                }
            }
        }

        Ok(economic_data)
    }

    async fn fetch_business_health(&self, _bioregion: &BioregionId) -> Result<Value, Error> {
        // Logic to fetch data from a local business data source
        Ok(Value::Null)
    }

    async fn fetch_ecological_metrics(&self, _bioregion: &BioregionId) -> Result<Value, Error> {
        // Logic to fetch data from an ecological data source
        Ok(Value::Null)
    }

    async fn fetch_community_metrics(&self, _bioregion: &BioregionId) -> Result<Value, Error> {
        // Logic to fetch data from a community metrics data source
        Ok(Value::Null)
    }
}

#!/bin/bash
# scripts/monitor_network_health.sh

set -euo pipefail

PROMETHEUS_URL="http://localhost:9090"
ALERT_WEBHOOK="${SLACK_WEBHOOK_URL}"

monitor_credit_flow() {
    local credit_velocity=$(curl -s "${PROMETHEUS_URL}/api/v1/query?query=credit_velocity_gauge" | jq -r '.data.result[0].value[1]')

    if (( $(echo "$credit_velocity < 0.5" | bc -l) )); then
        send_alert "⚠️ Credit velocity below healthy threshold: $credit_velocity"
    fi
}

monitor_community_health() {
    local avg_health=$(curl -s "${PROMETHEUS_URL}/api/v1/query?query=avg(community_health_score)" | jq -r '.data.result[0].value[1]')

    if (( $(echo "$avg_health < 70" | bc -l) )); then
        send_alert "🏥 Average community health declining: $avg_health"
    fi
}

send_alert() {
    local message="$1"
    curl -X POST -H 'Content-type: application/json' \
        --data "{\"text\":\"$message\"}" \
        "$ALERT_WEBHOOK"
}

main() {
    echo "Starting network health monitoring..."
    while true; do
        monitor_credit_flow
        monitor_community_health
        sleep 300  # Check every 5 minutes
    done
}

main "$@"