These constants are usable, each group with specific opcodes, in Teal syntax, to specify various options, e.g. which transaction field to look up.
| Name | TEAL V | Status |
| Secp256k1 | 7 | ❌ |
| Secp256r1 | 7 | ❌ |
| Name | TEAL V | Status |
| Sender | 1 | ✔️ |
| Fee | 1 | ❌ |
| FirstValid | 1 | ✔️ |
| FirstValidTime | 1 | ✔️ |
| LastValid | 1 | ✔️ |
| Note | 1 | ❌ |
| Lease | 1 | ❌ |
| Receiver | 1 | ✔️ |
| Amount | 1 | ✔️ |
| CloseRemainderTo | 1 | ❌ |
| VotePK | 1 | ❌ |
| SelectionPK | 1 | ❌ |
| VoteFirst | 1 | ❌ |
| VoteLast | 1 | ❌ |
| VoteKeyDilution | 1 | ❌ |
| Type | 1 | ✔️ (as TxType) |
| TypeEnum | 1 | ✔️ |
| XferAsset | 1 | ✔️ |
| AssetAmount | 1 | ✔️ |
| AssetSender | 1 | ❌ (Named AssetASender) |
| AssetReceiver | 1 | ✔️ |
| AssetCloseTo | 1 | ✔️ |
| GroupIndex | 1 | ✔️ (Group index corresponds with transaction ID) |
| TxID | 1 | Unsure |
| ApplicationID | 2 | ✔️ |
| OnCompletion | 2 | ✔️ |
| ApplicationArgs | 2 | ✔️ (I think ApplicationArgs need to always be Bytes when accessed from within the program) |
| NumAppArgs | 2 | ✔️ |
| Accounts | 2 | ✔️ |
| NumAccounts | 2 | ✔️ |
| ApprovalProgram | 2 | ❌ (Needs access to compiled Teal) |
| ClearStateProgram | 2 | ❌ (Needs access to compiled Teal) |
| RekeyTo | 2 | ❌ |
| ConfigAsset | 2 | ✔️ |
| ConfigAssetTotal | 2 | ✔️ |
| ConfigAssetDecimals | 2 | ✔️ |
| ConfigAssetDefaultFrozen | 2 | ✔️ |
| ConfigAssetUnitName | 2 | ✔️ |
| ConfigAssetName | 2 | ✔️ |
| ConfigAssetURL | 2 | ✔️ |
| ConfigAssetMetadataHash | 2 | ❌ |
| ConfigAssetManager | 2 | ❌ (Needs integration with other asset manager actions) |
| ConfigAssetReserve | 2 | ❌ |
| ConfigAssetFreeze | 2 | ❌ |
| ConfigAssetClawback | 2 | ❌ |
| FreezeAsset | 2 | ❌ (Asset freezing not implemented) |
| FreezeAssetAccount | 2 | ❌ |
| FreezeAssetFrozen | 2 | ❌ |
| Assets | 3 | ✔️ |
| NumAssets | 3 | ✔️ |
| Applications | 3 | ✔️ |
| NumApplications | 3 | ✔️ |
| GlobalNumUint | 3 | ❌ |
| GlobalNumByteSlice | 3 | ❌ |
| LocalNumUint | 3 | ❌ |
| LocalNumByteSlice | 3 | ❌ |
| ExtraProgramPages | 4 | ❌ (Needs accessor, and eventually check if compiled program fits?) |
| Nonparticipation | 5 | ❌ |
| Logs | 5 | ❌ |
| NumLogs | 5 | ❌ |
| CreatedAssetID | 5 | ❌ |
| CreatedApplicationID | 5 | ❌ |
| LastLog | 6 | ❌ |
| StateProofPK | 6 | ❌ |
| Name | TEAL V | Status |
| MinTxnFee | 1 | ✔️ |
| MinBalance | 1 | ✔️ |
| MaxTxnLife | 1 | ✔️ |
| ZeroAddress | 1 | ✔️ |
| GroupSize | 1 | ✔️ |
| LogicSigVersion | 2 | ❌ |
| Round | 2 | ❌ |
| LatestTimestamp | 2 | ❌ |
| CurrentApplicationID | 2 | ✔️ |
| CreatorAddress | 3 | ❌ |
| CurrentApplicationAddress | 5 | ❌ |
| GroupID | 5 | ❌ |
| OpcodeBudget | 6 | ❌ |
| CallerApplicationID | 6 | ❌ |
| CallerApplicationAddress | 6 | ❌ |
| Name | TEAL V | Status |
| URLEncoding | 7 | ❌ |
| StdEncoding | 7 | ❌ |
| Name | TEAL V | Status |
| JSONString | 7 | ❌ |
| JSONUint64 | 7 | ❌ |
| JSONObject | 7 | ❌ |
| Name | TEAL V | Status |
| AssetBalance | 2 | ❌ |
| AssetFrozen | 2 | ❌ |
| Name | TEAL V | Status |
| AssetTotal | 2 | ❌ |
| AssetDecimals | 2 | ❌ |
| AssetDefaultFrozen | 2 | ❌ |
| AssetUnitName | 2 | ❌ |
| AssetName | 2 | ❌ |
| AssetURL | 2 | ❌ |
| AssetMetadataHash | 2 | ❌ |
| AssetManager | 2 | ❌ |
| AssetReserve | 2 | ❌ |
| AssetFreeze | 2 | ❌ |
| AssetClawback | 2 | ❌ |
| AssetCreator | 5 | ❌ |
| Name | TEAL V | Status |
| AppApprovalProgram | 5 | ❌ |
| AppClearStateProgram | 5 | ❌ |
| AppGlobalNumUint | 5 | ❌ |
| AppGlobalNumByteSlice | 5 | ❌ |
| AppLocalNumUint | 5 | ❌ |
| AppLocalNumByteSlice | 5 | ❌ |
| AppExtraProgramPages | 5 | ❌ |
| AppCreator | 5 | ❌ |
| AppAddress | 5 | ❌ |
| Name | TEAL V | Status |
| AcctBalance | 6 | ❌ |
| AcctMinBalance | 6 | ❌ |
| AcctAuthAddr | 6 | ❌ |
| Name | TEAL V | Status |
| Secp256k1 | 7 | ❌ |
| Secp256r1 | 7 | ❌ |
| Name | TEAL V | Status |
| unknown | | ❌ |
| pay | | ❌ |
| keyreg | | ❌ |
| acfg | | ❌ |
| axfer | | ❌ |
| afrz | | ❌ |
| appl | | ❌ |