Protocol Parameters

Protocol parameters are constants that define the limits and requirements of the Algorand blockchain. These parameters control various aspects of the network including transaction fees, minimum balances, smart contract constraints, and asset creation limits. Understanding these parameters is essential for developers building on Algorand, as they directly impact the cost and feasibility of different operations on the network.

Smart Contract Costs & Constraints Learn about the specific costs and constraints that affect smart contract development

Minimum Balance Requirements

Parameter	Value	Variable	Note
Default	0.1 Algo	MinBalance
Opt-in ASA	0.1 Algo	MinBalance
Created ASA	0.1 Algo	MinBalance	ASA creator is automatically opted in

Minimum Balance Requirements for Smart Contracts

Name	Value	Variable	Note
Per page application creation fee	0.1 Algo	AppFlatParamsMinBalance
Flat for application opt-in	0.1 Algo	AppFlatOptInMinBalance
Per state entry	0.025 Algo	SchemaMinBalancePerEntry
Addition per integer entry	0.0035 Algo	SchemaUintMinBalance
Addition per byte slice entry	0.025 Algo	SchemaBytesMinBalance
Per Box created	0.0025 Algo	BoxFlatMinBalance
Per byte in box created	0.0004 Algo	BoxByteMinBalance	Includes the length of the key

Transaction Parameters

Name	Value	Variable	Note
Minimum transaction fee, in all cases	0.001 Algo	MinTxnFee
Additional minimum constraint if congested	Additional fee per byte	-
Max number of transactions in a group	16	MaxTxGroupSize
Max number of inner transactions	256	MaxInnerTransactions	Each transaction allows 16 inner transactions, multiplied by MaxTxGroupSize (16) through inner transaction pooling.
Maximum size of a block	5000000 bytes	MaxTxnBytesPerBlock
Maximum size of note	1024 bytes	MaxTxnNoteBytes
Maximum transaction life	1000 rounds	MaxTxnLife

ASA Parameters

Name	Value	Variable	Note
Max number of ASAs (create and opt-in)	Unlimited	MaxAssetsPerAccount
Max asset name size	32 bytes	MaxAssetNameBytes
Max unit name size	8 bytes	MaxAssetUnitNameBytes
Max URL size	96 bytes	MaxAssetURLBytes
Metadata hash	32 bytes		Padded with zeros if shorter than 32 bytes

Smart Signature Parameters

Name	Value	Variable	Note
Max size of compiled TEAL code combined with arguments	1000 bytes	LogicSigMaxSize
Max cost of TEAL code	20000	LogicSigMaxCost

Smart Contract Parameters

Name	Value	Variable	Note
Page size of compiled approval + clear TEAL code	2048 bytes	MaxAppProgramLen	by default, each application has a single page
Max extra app pages	3	MaxExtraAppProgramPages	an application can “pay” for additional pages via minimum balance
Max cost of approval TEAL code	700	MaxAppProgramCost
Max cost of clear TEAL code	700	MaxAppProgramCost
Max number of scratch variables	256
Max depth of stack	1000	MaxStackDepth
Max number of arguments	16	MaxAppArgs
Max combined size of arguments	2048 bytes	MaxAppTotalArgLen
Max number of global state keys	64	MaxGlobalSchemaEntries
Max number of local state keys	16	MaxLocalSchemaEntries
Max number of log messages	32	MaxLogCalls
Max size of log messages	1024	MaxLogSize
Max key size	64 bytes	MaxAppKeyLen
Max []byte value size	128 bytes	MaxAppBytesValueLen
Max key + value size	128 bytes	MaxAppSumKeyValueLens
Max number of foreign accounts	4	MaxAppTxnAccounts
Max number of foreign ASAs	8	MaxAppTxnForeignAssets
Max number of foreign applications	8	MaxAppTxnForeignApps
Max number of foreign accounts + ASAs + applications + box storage	8	MaxAppTotalTxnReferences
Max number of created applications	Unlimited	MaxAppsCreated
Max number of opt-in applications	Unlimited	MaxAppsOptedIn

Box Parameters

Name	Value	Variable	Note
Max size of box	32768	MaxBoxSize	Does not include name/key length, which is capped at 64 bytes by MaxAppKeyLen
Max box references	8	MaxAppBoxReferences
Bytes per Box reference	1024	BytesPerBoxReference
Max box key size	64 bytes	MaxAppKeyLen