init

negot8/contracts/AgreementRegistry.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+contract AgreementRegistry {
+    struct Agreement {
+        bytes32 agreementHash;
+        string featureType;
+        string summary;
+        uint256 timestamp;
+        address registeredBy;
+    }
+
+    mapping(string => Agreement) public agreements;  // negotiationId => Agreement
+    string[] public agreementIds;
+
+    event AgreementRegistered(
+        string indexed negotiationId,
+        bytes32 agreementHash,
+        string featureType,
+        string summary,
+        uint256 timestamp
+    );
+
+    function registerAgreement(
+        string calldata negotiationId,
+        bytes32 agreementHash,
+        string calldata featureType,
+        string calldata summary
+    ) external {
+        agreements[negotiationId] = Agreement({
+            agreementHash: agreementHash,
+            featureType: featureType,
+            summary: summary,
+            timestamp: block.timestamp,
+            registeredBy: msg.sender
+        });
+        agreementIds.push(negotiationId);
+
+        emit AgreementRegistered(
+            negotiationId, agreementHash, featureType, summary, block.timestamp
+        );
+    }
+
+    function getAgreement(string calldata negotiationId)
+        external view returns (Agreement memory)
+    {
+        return agreements[negotiationId];
+    }
+
+    function totalAgreements() external view returns (uint256) {
+        return agreementIds.length;
+    }
+}

negot8/contracts/deploy.py

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+"""
+Deploy AgreementRegistry.sol to Polygon Amoy testnet using web3.py + native solc.
+Run from project root: python3 contracts/deploy.py
+"""
+import sys, os, subprocess, json
+sys.path.insert(0, 'backend')
+
+from dotenv import load_dotenv
+load_dotenv('.env')
+
+from web3 import Web3
+
+# ── Config ───────────────────────────────────────────────────────────────────
+RPC_URL     = os.getenv("POLYGON_RPC_URL", "https://rpc-amoy.polygon.technology/")
+PRIVATE_KEY = os.getenv("POLYGON_PRIVATE_KEY", "")
+CHAIN_ID    = 80002
+
+w3      = Web3(Web3.HTTPProvider(RPC_URL))
+account = w3.eth.account.from_key(PRIVATE_KEY)
+
+print(f"Connected : {w3.is_connected()}")
+print(f"Address   : {account.address}")
+print(f"Balance   : {w3.from_wei(w3.eth.get_balance(account.address), 'ether')} POL")
+print(f"Chain ID  : {w3.eth.chain_id}")
+
+# ── Compile with native solc (installed via Homebrew) ────────────────────────
+sol_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "AgreementRegistry.sol")
+print(f"\nCompiling {sol_path} ...")
+
+result = subprocess.run(
+    ["solc", "--combined-json", "abi,bin", "--optimize", sol_path],
+    capture_output=True, text=True
+)
+if result.returncode != 0:
+    print(f"❌ Compilation failed:\n{result.stderr}")
+    sys.exit(1)
+
+compiled   = json.loads(result.stdout)
+key        = list(compiled["contracts"].keys())[0]   # e.g. "path:AgreementRegistry"
+raw_abi    = compiled["contracts"][key]["abi"]
+abi        = json.loads(raw_abi) if isinstance(raw_abi, str) else raw_abi
+bytecode   = compiled["contracts"][key]["bin"]
+print(f"✅ Compiled successfully  (contract key: {key})")
+
+# ── Deploy ───────────────────────────────────────────────────────────────────
+ContractFactory = w3.eth.contract(abi=abi, bytecode=bytecode)
+
+gas_price = w3.eth.gas_price
+tip        = w3.to_wei(35, "gwei")
+max_fee    = gas_price + tip
+
+print(f"\nDeploying ... (base gas: {w3.from_wei(gas_price, 'gwei'):.1f} gwei, tip: 35 gwei)")
+
+tx = ContractFactory.constructor().build_transaction({
+    "from":                 account.address,
+    "nonce":                w3.eth.get_transaction_count(account.address),
+    "gas":                  800_000,
+    "maxFeePerGas":         max_fee,
+    "maxPriorityFeePerGas": tip,
+    "chainId":              CHAIN_ID,
+})
+
+signed  = w3.eth.account.sign_transaction(tx, PRIVATE_KEY)
+tx_hash = w3.eth.send_raw_transaction(signed.raw_transaction)
+print(f"Tx sent   : 0x{tx_hash.hex()}")
+print("Waiting for confirmation (~2 seconds) ...")
+
+receipt          = w3.eth.wait_for_transaction_receipt(tx_hash, timeout=120)
+contract_address = receipt.contractAddress
+
+print(f"\n{'='*60}")
+print(f"✅ CONTRACT DEPLOYED SUCCESSFULLY")
+print(f"{'='*60}")
+print(f"Contract Address : {contract_address}")
+print(f"Transaction Hash : 0x{tx_hash.hex()}")
+print(f"Block Number     : {receipt.blockNumber}")
+print(f"Gas Used         : {receipt.gasUsed}")
+print(f"Explorer         : https://amoy.polygonscan.com/address/{contract_address}")
+print(f"{'='*60}")
+print(f"\n📋 Add this to your .env:")
+print(f"AGREEMENT_CONTRACT_ADDRESS={contract_address}")