Stellar Integration

import {
  rpc,
  TransactionBuilder,
  Networks,
  Contract,
  scValToNative,
  nativeToScVal,
} from '@stellar/stellar-sdk'
 
type StellarSbt = {
  action_nullifier: bigint
  circuit_id: bigint
  expiry: bigint
  id: bigint
  minter: string
  public_values: Array<bigint>
  recipient: string
  revoked: boolean
}
 
type StellarSbtStatus = 'valid' | 'expired' | 'revoked' | 'none'
 
const sorobanRpcUrl = 'https://mainnet.sorobanrpc.com'
const sbtContractAddress = 'CCNTHEVSWNDOQAMXXHFOLQIXWUINUPTJIM6AXFSKODNVXWA4N7XV3AI5'
 
async function getStellarSBT(
  address: string,
  circuitId: string
): Promise<{ sbt?: StellarSbt; status: StellarSbtStatus }> {
  const sorobanServer = new rpc.Server(sorobanRpcUrl)
  const userAccount = await sorobanServer.getAccount(address)
  const contract = new Contract(sbtContractAddress)
 
  const operation = contract.call(
    'get_sbt',
    nativeToScVal(address, { type: 'address' }),
    nativeToScVal(circuitId, { type: 'u256' })
  )
 
  const transaction = new TransactionBuilder(userAccount, {
    networkPassphrase: Networks.PUBLIC,
    fee: '100',
  })
    .addOperation(operation)
    .setTimeout(60)
    .build()
 
  const response = await sorobanServer.simulateTransaction(transaction)
 
  if (rpc.Api.isSimulationSuccess(response)) {
    const parsed = rpc.parseRawSimulation(response)
    const sbt = scValToNative(parsed.result?.retval)
    return { sbt, status: 'valid' }
  }
 
  const error = response.error
  if (error?.includes('Error(Contract, #1)')) return { status: 'none' }
  if (error?.includes('Error(Contract, #5)')) return { status: 'revoked' }
  if (error?.includes('Error(Contract, #6)')) return { status: 'expired' }
 
  throw new Error(`SBT query failed: ${error}`)
}

soroban contract fetch \
  --id CCNTHEVSWNDOQAMXXHFOLQIXWUINUPTJIM6AXFSKODNVXWA4N7XV3AI5 \
  -o ./passport_sbt_contract.wasm \
  --network mainnet \
  --network-passphrase "Public Global Stellar Network ; September 2015" \
  --rpc-url https://mainnet.sorobanrpc.com

#![no_std]
use soroban_sdk::{contract, contractimpl, Env, Address, U256};
 
mod passport_sbt_contract {
    soroban_sdk::contractimport!(
        file = "../../passport_sbt_contract.wasm"
    );
}
 
#[contract]
pub struct MyContract;
 
#[contractimpl]
impl MyContract {
    pub fn get_sbt(
        env: Env,
        recipient: Address,
        circuit_id: U256
    ) -> passport_sbt_contract::SBT {
        let contract_addr = Address::from_str(
            &env,
            "CCNTHEVSWNDOQAMXXHFOLQIXWUINUPTJIM6AXFSKODNVXWA4N7XV3AI5"
        );
        let client = passport_sbt_contract::Client::new(&env, &contract_addr);
        client.get_sbt(&recipient, &circuit_id)
    }
}