SBOR Limits
In Radix Engine, almost all payloads are encoded Scrypto SBOR or Manifest SBOR, including but not limited to:
- Transaction payload
- Component state
- Function invocation input and output
- System APIs
When the engine validates or decodes these payloads, it applies the following additional limits:
| Limit | Value | Description |
|---|
BLUEPRINT_PAYLOAD_MAX_DEPTH | 48 | The max depth of blueprint payload, such as component state, events and function input/output. |
KEY_VALUE_STORE_ENTRY_MAX_DEPTH | 48 | The max depth of KeyValueStore entries, both keys and values. |
Transaction Limits
| Limit | Value | Description |
|---|
MAX_NUMBER_OF_INTENT_SIGNATURES | 16 | The maximum number of signatures that can be used to sign a transaction intent. This does not include notary signature. |
MAX_NUMBER_OF_BLOBS | 16 | The maximum number of blobs a transaction can include. |
MIN_TIP_PERCENTAGE | 0% | The minimum tip percentage. |
MAX_TIP_PERCENTAGE | 65,535% | The maximum tip percentage. |
MAX_EPOCH_RANGE | 8640 | The maximum allowed epoch range in the transaction header. This is roughly about 30 days assuming a 5-minute epoch time. |
MAX_TRANSACTION_SIZE | 1 MiB | The maximum transaction payload size. |
System Limits
| Limit | Value | Description |
|---|
EXECUTION_COST_UNIT_LIMIT | 100,000,000 | The maximum number of execution cost units that a transaction can use. |
FINALISATION_COST_UNIT_LIMIT | 50,000,000 | The maximum number of finalisation cost units that a transaction can use. |
PREVIEW_CREDIT_IN_XRD | 1,000,000 | The amount of XRD that is used as transaction fee when previewing a manifest intent. |
MAX_CALL_DEPTH | 8 | The max depth of the call frames.
Depth increases by 1 when a function or method is invoked and decreases by 1 after the invocation is finished. |
MAX_HEAP_SUBSTATE_TOTAL_SIZE | 64 MiB | The maximum total size of substates in the Heap.- Both substate keys and values are accounted.
- Heap is the storage that keeps all the substates of nodes that are neither globalised nor owned by a global object.
|
MAX_TRACK_SUBSTATE_TOTAL_SIZE | 64 MiB | The maximum total size of substates in the Heap.- Both substate keys and values are accounted.
- Track is the storage that keeps all the substates of "loaded" globalised nodes and their children.
|
MAX_SUBSTATE_KEY_SIZE | 2 KiB | The maximum size of a substate key. |
MAX_SUBSTATE_VALUE_SIZE | 2 MiB | The maximum size of a substate value. |
MAX_INVOKE_PAYLOAD | 1 MiB | The maximum size of invocation payload, encoding of the call arguments. |
MAX_EVENT_SIZE | 32 KiB | The maximum size of a single event. |
MAX_NUMBER_OF_EVENTS | 256 | The maximum number of events that a transaction can produce. |
MAX_LOG_SIZE | 32 KiB | The maximum size of a single log. |
MAX_NUMBER_OF_LOGS< | 256 | The maximum number of logs that a transaction can produce. |
MAX_PACK_MESSAGE_SIZE | 32 KiB | The maximum size of a panic message. |
WASM Limits
| Limit | Value | Description |
|---|
MAX_MEMORY_SIZE_IN_PAGES | 8 | The maximum depth of an access rule. |
MAX_INITIAL_TABLE_SIZE | 1024 | The maximum initial table size. |
MAX_NUMBER_OF_BR_TABLE_TARGETS | 256 | The maximum of BR table targets. |
MAX_NUMBER_OF_GLOBALS | 512 | The maximum number of global variables. |
MAX_NUMBER_OF_FUNCTIONS | 8192
| The maximum number of functions. |
MAX_NUMBER_OF_FUNCTION_PARAMS | 32 | The maximum of parameters in a single function. |
MAX_NUMBER_OF_FUNCTION_LOCALS | 256 | The maximum of locals in a single function. |
MAX_NUMBER_OF_BUFFERS | 32 | The max number of buffers that a Scrypto VM can allocate.
Buffers are used for data exchange between system and Scrypto blueprints. |
Metadata Limits
| Limit | Value | Description |
|---|
MAX_METADATA_KEY_STRING_LEN | 100 | The maximum length of a metadata key (in characters). |
MAX_METADATA_VALUE_SBOR_LEN | 4 KiB | The maximum size of a metadata value (measured in bytes of the SBOR encoding). |
MAX_URL_LENGTH | 1024 | The maximum length of a URL. |
MAX_ORIGIN_LENGTH | 1024 | The maximum length of an Origin. |
MAX_ACCESS_RULE_DEPTH | 8 | The maximum depth of an access rule. |
MAX_ACCESS_RULE_TOTAL_NODES | 64 | The maximum total number of nodes in an access rule. |
Access Rule Limits
| Limit | Value | Description |
|---|
MAX_ACCESS_RULE_DEPTH | 8 | The maximum depth of an access rule. |
MAX_ACCESS_RULE_TOTAL_NODES | 64 | The maximum total number of nodes in an access rule. |
Royalty Limits
| Limit | Value | Description |
|---|
MAX_PER_FUNCTION_ROYALTY_AMOUNT_IN_XRD | 166.666666666666666666 | The maximum royalty amount (converted into XRD) that can be set on a function.
This is roughly 10 USD. |
Blueprint Package Limits
| Limit | Value | Description |
|---|
MAX_FEATURE_NAME_LEN | 100 | The maximum length of a feature name.
Note: The "features" is a capability exposed to native blueprints only. |
MAX_EVENT_NAME_LEN | 100 | The maximum length of an event name. |
MAX_REGISTERED_TYPE_NAME_LEN
| 100 | The maximum length of the name of a registered type. |
MAX_BLUEPRINT_NAME_LEN
| 100 | The maximum length of a blueprint name. |
MAX_FUNCTION_NAME_LEN
| 256 | The maximum length of a function name. |
MAX_NUMBER_OF_BLUEPRINT_FIELDS
| 256 | The maximum number of fields defined in a blueprint.
Note: Scrypto blueprints have only one field as of now.
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