Tokenization events

This page covers all Tokenization events that can trigger webhook notifications, and their associated data objects for the Webhooks v2 service. These events are part of the Fireblocks Webhooks v2 event types. For a complete list of supported webhook events, see Event types.

Tokenization event types

To receive a specific event, include its eventType in the webhook’s notification object.

Event type	Data object returned
onchain_data.updated	OnchainDataUpdatedEventData

Supported blockchains

Fireblocks generates Tokenization webhook events only for managed smart contracts deployed on the following blockchains.

Testnets

Ethereum Sepolia (sepolia)
Polygon Amoy (amoy)
BNB Smart Chain Testnet (bsc_testnet)
Optimism Sepolia (optimism_sepolia)
Base Sepolia (base_sepolia)
Avalanche C-Chain Fuji (fuji)
Arbitrum Sepolia (arbitrum_sepolia)

Mainnets

Ethereum (ethereum)
BNB Smart Chain (bsc)
Polygon (polygon)
Base (base)
Avalanche C-Chain (avalanche)
Optimism (optimism)
Arbitrum (arbitrum)
Gnosis (gnosis)
Ethereum Hoodi (hoodi)

Tokenization events are emitted only for contracts deployed on the supported blockchains listed above.

Data objects

OnchainDataUpdatedEventData

Parameter	Type	Description
baseAssetId	string	The AssetId of the blockchain’s gas token.
blockHash	string	Hash of the block that contains the transaction emitting the log.
blockNumber	number	Height of the block that contains the transaction.
blockTimestamp	number	The time the block was mined, as indicated in the block header.
chainId	number	EVM chain identifier (as per EIP-155).
contractAddress	string	The address that emitted the log.
cumulativeGasUsed	string	Total gas used in the block up to and including this transaction.
decodedLogs	object	DecodedLog
effectiveGasPrice	string	Actual price paid per gas unit for this transaction.
from	string	Sender of the transaction.
gasUsed	integer	Gas consumed by this transaction.
logsBloom	string	Bloom filter summarizing addresses and topics for the transaction logs.
status	string	The status of the transaction (0x0 = failure, 0x1 = success).
to	string	The recipient of the transaction.
transactionHash	string	Hash that identifies the transaction.
transactionIndex	string	Zero-based index of the transaction within the block.
type	string	Transaction type tag (as per EIP-2718).

DecodedLog

Parameter	Type	Description
address	string	The contract address emitting the event.
blockHash	string	Hash of the block that contains the transaction emitting the log.
blockNumber	string	Height of the block that contains the transaction.
transactionHash	string	Hash that identifies the transaction.
logIndex	string	The index of the log within the transaction.
key	string	The decoded name of the log parameter.
value	string	The value associated with the key.

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Integrations

Tokenization event types

Supported blockchains

Testnets

Mainnets

Data objects

OnchainDataUpdatedEventData

DecodedLog

​Tokenization event types

​Supported blockchains

​Testnets

​Mainnets

​Data objects

​OnchainDataUpdatedEventData

​DecodedLog

Tokenization event types

Supported blockchains

Testnets

Mainnets

Data objects

OnchainDataUpdatedEventData

DecodedLog