Execution Context
This page maps Solidity execution globals to the Neo N3 runtime calls or native contract calls used by Neo DevPack for Solidity.
Block and Transaction Context
| Solidity / EVM | Neo N3 Mapping | Fidelity |
|---|---|---|
block.timestamp | System.Runtime.GetTime, normalized from milliseconds to seconds | Exact enough for Solidity time logic. |
block.number | Ledger.currentIndex native contract call | Exact block height mapping. |
block.chainid | Neo network magic | Compile-time network value. |
blockhash(n) | Ledger.getBlockHash(n) | Neo block hash, not Ethereum block hash. |
block.coinbase | address(0) | Approximate; Neo dBFT has no miner account. |
block.difficulty / block.prevrandao | Runtime.getRandom() | Approximate; randomness model differs. |
block.gaslimit | Policy.getExecFeeFactor() | Approximate; Neo fee accounting differs. |
block.basefee | Policy.getFeePerByte() | Approximate; Neo does not use EIP-1559 base fee semantics. |
tx.origin | First transaction signer script hash | Available, but do not use for authorization. |
tx.gasprice | Policy.getFeePerByte() | Approximate fee signal. |
Message Context
| Solidity / EVM | Neo N3 Mapping | Fidelity |
|---|---|---|
msg.sender | System.Runtime.GetCallingScriptHash | Caller script hash or transaction signer, depending on invocation path; internal/self-offset routes can inject a direct-caller override. |
msg.value | Payment callback amount parameter | Only meaningful inside NEP-17/NEP-11 payment callbacks. |
msg.data | Current selector plus ABI-encoded arguments | Approximate outside payment callbacks; callback data is typed. |
msg.sig | Current function selector | Approximate for internal-call semantics. |
Contract Context
| Solidity / EVM | Neo N3 Mapping | Fidelity |
|---|---|---|
this / address(this) | System.Runtime.GetExecutingScriptHash | Exact current contract script hash. |
gasleft() | System.Runtime.GasLeft | Neo GAS remaining for the current invocation. |
address.code | ContractManagement.getContract() script bytes | Empty for non-contract addresses. |
address.codehash | Contract script hash | bytes32(0) for non-contract addresses. |
selfdestruct(addr) | ContractManagement.destroy() | Permanent destroy, no refund semantics. |
Authorization Note
On Ethereum, many contracts gate privileged paths with msg.sender. On Neo, state-changing user authority should normally be checked with Runtime.checkWitness(address). msg.sender identifies the immediate caller, while witnesses prove which account authorized the transaction.