esg_tokenization_protocol/
lib.rs

1use serde::{Serialize, Deserialize};
2use sha3::{Digest, Sha3_512};
3use uuid::Uuid;
4
5/// Estrutura de metadados ESG conforme o EIP AgroCrypto Quantum Governance
6#[derive(Debug, Serialize, Deserialize, Clone)]
7pub struct ESGMetadata {
8    pub standard: String,
9    pub category: String,
10    pub geo: String,
11    pub carbon_value: f64,
12    pub cycle: String,
13    pub digest: String,
14    pub physical_id: String,
15    pub attestation: Attestation,
16    pub status: String,
17    pub evidence: String,
18}
19
20/// Estrutura de atestação (assinada pelo ATF-AI)
21#[derive(Debug, Serialize, Deserialize, Clone)]
22pub struct Attestation {
23    pub atf_digest: String,
24    pub signer: String,
25}
26
27/// Função utilitária para gerar digest SHA3-512 a partir de uma string
28pub fn generate_digest(input: &str) -> String {
29    let mut hasher = Sha3_512::new();
30    hasher.update(input.as_bytes());
31    format!("{:x}", hasher.finalize())
32}
33
34/// Cria um novo ESGMetadata com base nos parâmetros recebidos
35pub fn create_metadata(category: &str, geo: &str, carbon_value: f64, cycle: &str) -> ESGMetadata {
36    // gera um digest único
37    let digest = generate_digest(&format!(
38        "{}:{}:{}:{}",
39        category, geo, carbon_value, cycle
40    ));
41
42    // gera um UUID pro physical_id
43    let physical_id = format!("seal:{}", Uuid::new_v4());
44
45    // clona o digest pra atf_digest antes de mover
46    let attestation = Attestation {
47        atf_digest: digest.clone(),
48        signer: "did:atf:ai:validator".to_string(),
49    };
50
51    ESGMetadata {
52        standard: "ERC-ESG/1.0".to_string(),
53        category: category.to_string(),
54        geo: geo.to_string(),
55        carbon_value,
56        cycle: cycle.to_string(),
57        digest,
58        physical_id,
59        attestation,
60        status: "issued".to_string(),
61        evidence: "cid:QmExample".to_string(),
62    }
63}
64
65#[cfg(test)]
66mod tests {
67    use super::*;
68
69    #[test]
70    fn test_metadata_generation() {
71        let meta = create_metadata("carbon", "BR-RS", 12.5, "2025-Q3");
72        assert_eq!(meta.standard, "ERC-ESG/1.0");
73        assert_eq!(meta.category, "carbon");
74        assert_eq!(meta.geo, "BR-RS");
75        assert_eq!(meta.status, "issued");
76        assert!(!meta.digest.is_empty());
77        assert!(!meta.attestation.atf_digest.is_empty());
78    }
79}
esg_tokenization_protocol/lib.rs

esg_tokenization_protocol/
lib.rs
