adding hedera folder from blackhole-sol repo

hedera/basics/.env.example

@@ -0,0 +1,6 @@
+# TESTNET CREDENTIALS
+OPERATOR_ID = 0.0.478... (your OPERATOR_ID)
+OPERATOR_PBKEY = 302a30050603... (your OPERATOR_PBKEY)
+OPERATOR_PVKEY = 302e02010030... (your OPERATOR_PVKEY)
+
+

hedera/basics/README.md

@@ -0,0 +1,15 @@
+### Proof of concept
+This example show how to:
+- deploy a smart contracct
+- make calls to a deployed contract
+- get and parse events
+
+To execute the example.js file you need to create a `.env` file with your credentials.
+
+
+### Tutorials and interesting articles
+- [Contract deployment and calls](https://hedera.com/blog/how-to-deploy-smart-contracts-on-hedera-part-1-a-simple-getter-and-setter-contract)
+- [Events](https://hedera.com/blog/how-to-get-event-information-from-hedera-smart-contracts)
+- [Consensus finality](https://hedera.com/blog/finality-of-consensus-you-can-take-it-to-the-bank-or-maybe-you-are-the-bank)
+- [Asynchronous Bizantine Fault Tolerance](https://hedera.com/learning/hedera-hashgraph/what-is-asynchronous-byzantine-fault-tolerance-abft)
+- [Bizantine Fault Tolerance Security](https://hedera.com/blog/counting-votes-why-a-2-3-threshold)

hedera/basics/contracts/abi.json

@@ -0,0 +1,58 @@
+[
+    {
+      "inputs": [
+        {
+          "internalType": "string",
+          "name": "message_",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "constructor"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "string",
+          "name": "message",
+          "type": "string"
+        }
+      ],
+      "name": "SetMessage",
+      "type": "event"
+    },
+    {
+      "inputs": [],
+      "name": "get_message",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "messageOut",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "string",
+          "name": "message_",
+          "type": "string"
+        }
+      ],
+      "name": "set_message",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    }
+  ]

hedera/basics/contracts/bytecode.json

@@ -0,0 +1,6 @@
+{
+    "linkReferences": {},
+    "object": "608060405234801561001057600080fd5b5060405161087c38038061087c8339818101604052602081101561003357600080fd5b810190808051604051939291908464010000000082111561005357600080fd5b8382019150602082018581111561006957600080fd5b825186600182028301116401000000008211171561008657600080fd5b8083526020830192505050908051906020019080838360005b838110156100ba57808201518184015260208101905061009f565b50505050905090810190601f1680156100e75780820380516001836020036101000a031916815260200191505b506040525050503373ffffffffffffffffffffffffffffffffffffffff167f3c55514de50d14506d6b7e1d1e94ee2f674c70c69370e5fe71a0d9de7c883854826040518080602001828103825283818151815260200191508051906020019080838360005b8381101561016757808201518184015260208101905061014c565b50505050905090810190601f1680156101945780820380516001836020036101000a031916815260200191505b509250505060405180910390a280600090805190602001906101b79291906101be565b505061025b565b828054600181600116156101000203166002900490600052602060002090601f016020900481019282601f106101ff57805160ff191683800117855561022d565b8280016001018555821561022d579182015b8281111561022c578251825591602001919060010190610211565b5b50905061023a919061023e565b5090565b5b8082111561025757600081600090555060010161023f565b5090565b6106128061026a6000396000f3fe608060405234801561001057600080fd5b50600436106100415760003560e01c80632e9826021461004657806332af2edb14610101578063f6f6753f14610184575b600080fd5b6100ff6004803603602081101561005c57600080fd5b810190808035906020019064010000000081111561007957600080fd5b82018360208201111561008b57600080fd5b803590602001918460018302840111640100000000831117156100ad57600080fd5b91908080601f016020809104026020016040519081016040528093929190818152602001838380828437600081840152601f19601f8201169050808301925050505050505091929192905050506102f5565b005b6101096103c2565b6040518080602001828103825283818151815260200191508051906020019080838360005b8381101561014957808201518184015260208101905061012e565b50505050905090810190601f1680156101765780820380516001836020036101000a031916815260200191505b509250505060405180910390f35b61025d6004803603604081101561019a57600080fd5b81019080803590602001906401000000008111156101b757600080fd5b8201836020820111156101c957600080fd5b803590602001918460018302840111640100000000831117156101eb57600080fd5b91908080601f016020809104026020016040519081016040528093929190818152602001838380828437600081840152601f19601f820116905080830192505050505050509192919290803573ffffffffffffffffffffffffffffffffffffffff169060200190929190505050610464565b60405180806020018373ffffffffffffffffffffffffffffffffffffffff168152602001828103825284818151815260200191508051906020019080838360005b838110156102b957808201518184015260208101905061029e565b50505050905090810190601f1680156102e65780820380516001836020036101000a031916815260200191505b50935050505060405180910390f35b3373ffffffffffffffffffffffffffffffffffffffff167f3c55514de50d14506d6b7e1d1e94ee2f674c70c69370e5fe71a0d9de7c883854826040518080602001828103825283818151815260200191508051906020019080838360005b8381101561036e578082015181840152602081019050610353565b50505050905090810190601f16801561039b5780820380516001836020036101000a031916815260200191505b509250505060405180910390a280600090805190602001906103be92919061053f565b5050565b606060008054600181600116156101000203166002900480601f01602080910402602001604051908101604052809291908181526020018280546001816001161561010002031660029004801561045a5780601f1061042f5761010080835404028352916020019161045a565b820191906000526020600020905b81548152906001019060200180831161043d57829003601f168201915b5050505050905090565b606060008273ffffffffffffffffffffffffffffffffffffffff167f3c55514de50d14506d6b7e1d1e94ee2f674c70c69370e5fe71a0d9de7c883854856040518080602001828103825283818151815260200191508051906020019080838360005b838110156104e15780820151818401526020810190506104c6565b50505050905090810190601f16801561050e5780820380516001836020036101000a031916815260200191505b509250505060405180910390a2836000908051906020019061053192919061053f565b508391503390509250929050565b828054600181600116156101000203166002900490600052602060002090601f016020900481019282601f1061058057805160ff19168380011785556105ae565b828001600101855582156105ae579182015b828111156105ad578251825591602001919060010190610592565b5b5090506105bb91906105bf565b5090565b5b808211156105d85760008160009055506001016105c0565b509056fea2646970667358221220bfde5944363054b48ca877ed4c2d9bb19b0026f55ac4ccaf93b79cd5cbe7e9bb64736f6c634300060c0033",
+    "opcodes": "PUSH1 0x80 PUSH1 0x40 MSTORE CALLVALUE DUP1 ISZERO PUSH2 0x10 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH1 0x40 MLOAD PUSH2 0x87C CODESIZE SUB DUP1 PUSH2 0x87C DUP4 CODECOPY DUP2 DUP2 ADD PUSH1 0x40 MSTORE PUSH1 0x20 DUP2 LT ISZERO PUSH2 0x33 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP2 ADD SWAP1 DUP1 DUP1 MLOAD PUSH1 0x40 MLOAD SWAP4 SWAP3 SWAP2 SWAP1 DUP5 PUSH5 0x100000000 DUP3 GT ISZERO PUSH2 0x53 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP4 DUP3 ADD SWAP2 POP PUSH1 0x20 DUP3 ADD DUP6 DUP2 GT ISZERO PUSH2 0x69 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP3 MLOAD DUP7 PUSH1 0x1 DUP3 MUL DUP4 ADD GT PUSH5 0x100000000 DUP3 GT OR ISZERO PUSH2 0x86 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP1 DUP4 MSTORE PUSH1 0x20 DUP4 ADD SWAP3 POP POP POP SWAP1 DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 DUP1 DUP4 DUP4 PUSH1 0x0 JUMPDEST DUP4 DUP2 LT ISZERO PUSH2 0xBA JUMPI DUP1 DUP3 ADD MLOAD DUP2 DUP5 ADD MSTORE PUSH1 0x20 DUP2 ADD SWAP1 POP PUSH2 0x9F JUMP JUMPDEST POP POP POP POP SWAP1 POP SWAP1 DUP2 ADD SWAP1 PUSH1 0x1F AND DUP1 ISZERO PUSH2 0xE7 JUMPI DUP1 DUP3 SUB DUP1 MLOAD PUSH1 0x1 DUP4 PUSH1 0x20 SUB PUSH2 0x100 EXP SUB NOT AND DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP JUMPDEST POP PUSH1 0x40 MSTORE POP POP POP CALLER PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH32 0x3C55514DE50D14506D6B7E1D1E94EE2F674C70C69370E5FE71A0D9DE7C883854 DUP3 PUSH1 0x40 MLOAD DUP1 DUP1 PUSH1 0x20 ADD DUP3 DUP2 SUB DUP3 MSTORE DUP4 DUP2 DUP2 MLOAD DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 DUP1 DUP4 DUP4 PUSH1 0x0 JUMPDEST DUP4 DUP2 LT ISZERO PUSH2 0x167 JUMPI DUP1 DUP3 ADD MLOAD DUP2 DUP5 ADD MSTORE PUSH1 0x20 DUP2 ADD SWAP1 POP PUSH2 0x14C JUMP JUMPDEST POP POP POP POP SWAP1 POP SWAP1 DUP2 ADD SWAP1 PUSH1 0x1F AND DUP1 ISZERO PUSH2 0x194 JUMPI DUP1 DUP3 SUB DUP1 MLOAD PUSH1 0x1 DUP4 PUSH1 0x20 SUB PUSH2 0x100 EXP SUB NOT AND DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP JUMPDEST POP SWAP3 POP POP POP PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 LOG2 DUP1 PUSH1 0x0 SWAP1 DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 PUSH2 0x1B7 SWAP3 SWAP2 SWAP1 PUSH2 0x1BE JUMP JUMPDEST POP POP PUSH2 0x25B JUMP JUMPDEST DUP3 DUP1 SLOAD PUSH1 0x1 DUP2 PUSH1 0x1 AND ISZERO PUSH2 0x100 MUL SUB AND PUSH1 0x2 SWAP1 DIV SWAP1 PUSH1 0x0 MSTORE PUSH1 0x20 PUSH1 0x0 KECCAK256 SWAP1 PUSH1 0x1F ADD PUSH1 0x20 SWAP1 DIV DUP2 ADD SWAP3 DUP3 PUSH1 0x1F LT PUSH2 0x1FF JUMPI DUP1 MLOAD PUSH1 0xFF NOT AND DUP4 DUP1 ADD OR DUP6 SSTORE PUSH2 0x22D JUMP JUMPDEST DUP3 DUP1 ADD PUSH1 0x1 ADD DUP6 SSTORE DUP3 ISZERO PUSH2 0x22D JUMPI SWAP2 DUP3 ADD JUMPDEST DUP3 DUP2 GT ISZERO PUSH2 0x22C JUMPI DUP3 MLOAD DUP3 SSTORE SWAP2 PUSH1 0x20 ADD SWAP2 SWAP1 PUSH1 0x1 ADD SWAP1 PUSH2 0x211 JUMP JUMPDEST JUMPDEST POP SWAP1 POP PUSH2 0x23A SWAP2 SWAP1 PUSH2 0x23E JUMP JUMPDEST POP SWAP1 JUMP JUMPDEST JUMPDEST DUP1 DUP3 GT ISZERO PUSH2 0x257 JUMPI PUSH1 0x0 DUP2 PUSH1 0x0 SWAP1 SSTORE POP PUSH1 0x1 ADD PUSH2 0x23F JUMP JUMPDEST POP SWAP1 JUMP JUMPDEST PUSH2 0x612 DUP1 PUSH2 0x26A PUSH1 0x0 CODECOPY PUSH1 0x0 RETURN INVALID PUSH1 0x80 PUSH1 0x40 MSTORE CALLVALUE DUP1 ISZERO PUSH2 0x10 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH1 0x4 CALLDATASIZE LT PUSH2 0x41 JUMPI PUSH1 0x0 CALLDATALOAD PUSH1 0xE0 SHR DUP1 PUSH4 0x2E982602 EQ PUSH2 0x46 JUMPI DUP1 PUSH4 0x32AF2EDB EQ PUSH2 0x101 JUMPI DUP1 PUSH4 0xF6F6753F EQ PUSH2 0x184 JUMPI JUMPDEST PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xFF PUSH1 0x4 DUP1 CALLDATASIZE SUB PUSH1 0x20 DUP2 LT ISZERO PUSH2 0x5C JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP2 ADD SWAP1 DUP1 DUP1 CALLDATALOAD SWAP1 PUSH1 0x20 ADD SWAP1 PUSH5 0x100000000 DUP2 GT ISZERO PUSH2 0x79 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP3 ADD DUP4 PUSH1 0x20 DUP3 ADD GT ISZERO PUSH2 0x8B JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP1 CALLDATALOAD SWAP1 PUSH1 0x20 ADD SWAP2 DUP5 PUSH1 0x1 DUP4 MUL DUP5 ADD GT PUSH5 0x100000000 DUP4 GT OR ISZERO PUSH2 0xAD JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST SWAP2 SWAP1 DUP1 DUP1 PUSH1 0x1F ADD PUSH1 0x20 DUP1 SWAP2 DIV MUL PUSH1 0x20 ADD PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 SWAP4 SWAP3 SWAP2 SWAP1 DUP2 DUP2 MSTORE PUSH1 0x20 ADD DUP4 DUP4 DUP1 DUP3 DUP5 CALLDATACOPY PUSH1 0x0 DUP2 DUP5 ADD MSTORE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND SWAP1 POP DUP1 DUP4 ADD SWAP3 POP POP POP POP POP POP POP SWAP2 SWAP3 SWAP2 SWAP3 SWAP1 POP POP POP PUSH2 0x2F5 JUMP JUMPDEST STOP JUMPDEST PUSH2 0x109 PUSH2 0x3C2 JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 DUP1 PUSH1 0x20 ADD DUP3 DUP2 SUB DUP3 MSTORE DUP4 DUP2 DUP2 MLOAD DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 DUP1 DUP4 DUP4 PUSH1 0x0 JUMPDEST DUP4 DUP2 LT ISZERO PUSH2 0x149 JUMPI DUP1 DUP3 ADD MLOAD DUP2 DUP5 ADD MSTORE PUSH1 0x20 DUP2 ADD SWAP1 POP PUSH2 0x12E JUMP JUMPDEST POP POP POP POP SWAP1 POP SWAP1 DUP2 ADD SWAP1 PUSH1 0x1F AND DUP1 ISZERO PUSH2 0x176 JUMPI DUP1 DUP3 SUB DUP1 MLOAD PUSH1 0x1 DUP4 PUSH1 0x20 SUB PUSH2 0x100 EXP SUB NOT AND DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP JUMPDEST POP SWAP3 POP POP POP PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 RETURN JUMPDEST PUSH2 0x25D PUSH1 0x4 DUP1 CALLDATASIZE SUB PUSH1 0x40 DUP2 LT ISZERO PUSH2 0x19A JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP2 ADD SWAP1 DUP1 DUP1 CALLDATALOAD SWAP1 PUSH1 0x20 ADD SWAP1 PUSH5 0x100000000 DUP2 GT ISZERO PUSH2 0x1B7 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP3 ADD DUP4 PUSH1 0x20 DUP3 ADD GT ISZERO PUSH2 0x1C9 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP1 CALLDATALOAD SWAP1 PUSH1 0x20 ADD SWAP2 DUP5 PUSH1 0x1 DUP4 MUL DUP5 ADD GT PUSH5 0x100000000 DUP4 GT OR ISZERO PUSH2 0x1EB JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST SWAP2 SWAP1 DUP1 DUP1 PUSH1 0x1F ADD PUSH1 0x20 DUP1 SWAP2 DIV MUL PUSH1 0x20 ADD PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 SWAP4 SWAP3 SWAP2 SWAP1 DUP2 DUP2 MSTORE PUSH1 0x20 ADD DUP4 DUP4 DUP1 DUP3 DUP5 CALLDATACOPY PUSH1 0x0 DUP2 DUP5 ADD MSTORE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND SWAP1 POP DUP1 DUP4 ADD SWAP3 POP POP POP POP POP POP POP SWAP2 SWAP3 SWAP2 SWAP3 SWAP1 DUP1 CALLDATALOAD PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND SWAP1 PUSH1 0x20 ADD SWAP1 SWAP3 SWAP2 SWAP1 POP POP POP PUSH2 0x464 JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 DUP1 PUSH1 0x20 ADD DUP4 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND DUP2 MSTORE PUSH1 0x20 ADD DUP3 DUP2 SUB DUP3 MSTORE DUP5 DUP2 DUP2 MLOAD DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 DUP1 DUP4 DUP4 PUSH1 0x0 JUMPDEST DUP4 DUP2 LT ISZERO PUSH2 0x2B9 JUMPI DUP1 DUP3 ADD MLOAD DUP2 DUP5 ADD MSTORE PUSH1 0x20 DUP2 ADD SWAP1 POP PUSH2 0x29E JUMP JUMPDEST POP POP POP POP SWAP1 POP SWAP1 DUP2 ADD SWAP1 PUSH1 0x1F AND DUP1 ISZERO PUSH2 0x2E6 JUMPI DUP1 DUP3 SUB DUP1 MLOAD PUSH1 0x1 DUP4 PUSH1 0x20 SUB PUSH2 0x100 EXP SUB NOT AND DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP JUMPDEST POP SWAP4 POP POP POP POP PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 RETURN JUMPDEST CALLER PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH32 0x3C55514DE50D14506D6B7E1D1E94EE2F674C70C69370E5FE71A0D9DE7C883854 DUP3 PUSH1 0x40 MLOAD DUP1 DUP1 PUSH1 0x20 ADD DUP3 DUP2 SUB DUP3 MSTORE DUP4 DUP2 DUP2 MLOAD DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 DUP1 DUP4 DUP4 PUSH1 0x0 JUMPDEST DUP4 DUP2 LT ISZERO PUSH2 0x36E JUMPI DUP1 DUP3 ADD MLOAD DUP2 DUP5 ADD MSTORE PUSH1 0x20 DUP2 ADD SWAP1 POP PUSH2 0x353 JUMP JUMPDEST POP POP POP POP SWAP1 POP SWAP1 DUP2 ADD SWAP1 PUSH1 0x1F AND DUP1 ISZERO PUSH2 0x39B JUMPI DUP1 DUP3 SUB DUP1 MLOAD PUSH1 0x1 DUP4 PUSH1 0x20 SUB PUSH2 0x100 EXP SUB NOT AND DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP JUMPDEST POP SWAP3 POP POP POP PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 LOG2 DUP1 PUSH1 0x0 SWAP1 DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 PUSH2 0x3BE SWAP3 SWAP2 SWAP1 PUSH2 0x53F JUMP JUMPDEST POP POP JUMP JUMPDEST PUSH1 0x60 PUSH1 0x0 DUP1 SLOAD PUSH1 0x1 DUP2 PUSH1 0x1 AND ISZERO PUSH2 0x100 MUL SUB AND PUSH1 0x2 SWAP1 DIV DUP1 PUSH1 0x1F ADD PUSH1 0x20 DUP1 SWAP2 DIV MUL PUSH1 0x20 ADD PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 SWAP3 SWAP2 SWAP1 DUP2 DUP2 MSTORE PUSH1 0x20 ADD DUP3 DUP1 SLOAD PUSH1 0x1 DUP2 PUSH1 0x1 AND ISZERO PUSH2 0x100 MUL SUB AND PUSH1 0x2 SWAP1 DIV DUP1 ISZERO PUSH2 0x45A JUMPI DUP1 PUSH1 0x1F LT PUSH2 0x42F JUMPI PUSH2 0x100 DUP1 DUP4 SLOAD DIV MUL DUP4 MSTORE SWAP2 PUSH1 0x20 ADD SWAP2 PUSH2 0x45A JUMP JUMPDEST DUP3 ADD SWAP2 SWAP1 PUSH1 0x0 MSTORE PUSH1 0x20 PUSH1 0x0 KECCAK256 SWAP1 JUMPDEST DUP2 SLOAD DUP2 MSTORE SWAP1 PUSH1 0x1 ADD SWAP1 PUSH1 0x20 ADD DUP1 DUP4 GT PUSH2 0x43D JUMPI DUP3 SWAP1 SUB PUSH1 0x1F AND DUP3 ADD SWAP2 JUMPDEST POP POP POP POP POP SWAP1 POP SWAP1 JUMP JUMPDEST PUSH1 0x60 PUSH1 0x0 DUP3 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH32 0x3C55514DE50D14506D6B7E1D1E94EE2F674C70C69370E5FE71A0D9DE7C883854 DUP6 PUSH1 0x40 MLOAD DUP1 DUP1 PUSH1 0x20 ADD DUP3 DUP2 SUB DUP3 MSTORE DUP4 DUP2 DUP2 MLOAD DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 DUP1 DUP4 DUP4 PUSH1 0x0 JUMPDEST DUP4 DUP2 LT ISZERO PUSH2 0x4E1 JUMPI DUP1 DUP3 ADD MLOAD DUP2 DUP5 ADD MSTORE PUSH1 0x20 DUP2 ADD SWAP1 POP PUSH2 0x4C6 JUMP JUMPDEST POP POP POP POP SWAP1 POP SWAP1 DUP2 ADD SWAP1 PUSH1 0x1F AND DUP1 ISZERO PUSH2 0x50E JUMPI DUP1 DUP3 SUB DUP1 MLOAD PUSH1 0x1 DUP4 PUSH1 0x20 SUB PUSH2 0x100 EXP SUB NOT AND DUP2 MSTORE PUSH1 0x20 ADD SWAP2 POP JUMPDEST POP SWAP3 POP POP POP PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 LOG2 DUP4 PUSH1 0x0 SWAP1 DUP1 MLOAD SWAP1 PUSH1 0x20 ADD SWAP1 PUSH2 0x531 SWAP3 SWAP2 SWAP1 PUSH2 0x53F JUMP JUMPDEST POP DUP4 SWAP2 POP CALLER SWAP1 POP SWAP3 POP SWAP3 SWAP1 POP JUMP JUMPDEST DUP3 DUP1 SLOAD PUSH1 0x1 DUP2 PUSH1 0x1 AND ISZERO PUSH2 0x100 MUL SUB AND PUSH1 0x2 SWAP1 DIV SWAP1 PUSH1 0x0 MSTORE PUSH1 0x20 PUSH1 0x0 KECCAK256 SWAP1 PUSH1 0x1F ADD PUSH1 0x20 SWAP1 DIV DUP2 ADD SWAP3 DUP3 PUSH1 0x1F LT PUSH2 0x580 JUMPI DUP1 MLOAD PUSH1 0xFF NOT AND DUP4 DUP1 ADD OR DUP6 SSTORE PUSH2 0x5AE JUMP JUMPDEST DUP3 DUP1 ADD PUSH1 0x1 ADD DUP6 SSTORE DUP3 ISZERO PUSH2 0x5AE JUMPI SWAP2 DUP3 ADD JUMPDEST DUP3 DUP2 GT ISZERO PUSH2 0x5AD JUMPI DUP3 MLOAD DUP3 SSTORE SWAP2 PUSH1 0x20 ADD SWAP2 SWAP1 PUSH1 0x1 ADD SWAP1 PUSH2 0x592 JUMP JUMPDEST JUMPDEST POP SWAP1 POP PUSH2 0x5BB SWAP2 SWAP1 PUSH2 0x5BF JUMP JUMPDEST POP SWAP1 JUMP JUMPDEST JUMPDEST DUP1 DUP3 GT ISZERO PUSH2 0x5D8 JUMPI PUSH1 0x0 DUP2 PUSH1 0x0 SWAP1 SSTORE POP PUSH1 0x1 ADD PUSH2 0x5C0 JUMP JUMPDEST POP SWAP1 JUMP INVALID LOG2 PUSH5 0x6970667358 0x22 SLT KECCAK256 0xBF 0xDE MSIZE DIFFICULTY CALLDATASIZE ADDRESS SLOAD 0xB4 DUP13 0xA8 PUSH24 0xED4C2D9BB19B0026F55AC4CCAF93B79CD5CBE7E9BB64736F PUSH13 0x634300060C0033000000000000 ",
+    "sourceMap": "26:832:0:-:0;;;193:125;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;262:10;251:32;;;274:8;251:32;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;303:8;293:7;:18;;;;;;;;;;;;:::i;:::-;;193:125;26:832;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;:::i;:::-;;;:::o;:::-;;;;;;;;;;;;;;;;;;;;;:::o;:::-;;;;;;;"
+  }

hedera/basics/contracts/stateful.sol

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-3.0
+pragma solidity >=0.7.0 <0.9.0;
+
+contract StatefulContract {
+    // sample event
+    event SetMessage(address indexed from, string message);
+
+    // the message we're storing
+    string message;
+
+    constructor(string memory message_) {
+        emit SetMessage(msg.sender, message_);
+        message = message_;
+    }
+
+    function set_message(string memory message_) public {
+        emit SetMessage(msg.sender, message_);
+        message = message_;
+    }
+
+    // return a string
+    function get_message() public view returns (string memory messageOut) {
+        messageOut = message;
+    }
+}