Chain Utility Functions¶

Dune SQL offers a series of functions designed to ease some common tasks when working with blockchain data.

These functions are helpful to generate links to the explorer of a chain, to specific addresses, or to specific transactions. Most of the time you'll want to use get_href() in combination with one of the other functions to generate a clickable link to a specific address or transaction.

Select
    get_href(get_chain_explorer_address('ethereum', to), cast(to as varchar))
FROM ethereum.transactions
limit 100

This sql code will generate a clickable link pointing to the explorer of the Ethereum chain for each address in the to column. The displayed link will be the address itself.

You can find all the functions in action on this dashboard: Chain Utility Functions

get_href()¶

get_href(varchar, varchar) → varchar

This function converts a link and associated text into a clickable hyperlink. The first argument is the link, and the second argument is the text to be displayed.

SELECT 
    get_href('https://dune.com', 'Dune')

get_chain_explorer_address()¶

get_chain_explorer_address(varchar, varchar) → varchar

This function generates a URL for the explorer of a specified chain (provided as a varchar) for a given address (also provided as a varchar).

SELECT 
    get_chain_explorer_address('ethereum', cast(to as varchar)) 
FROM ethereum.transactions 
limit 100

get_chain_explorer_address()¶

get_chain_explorer_address(varchar, varbinary) → varchar

This function generates a URL for the explorer of a specified chain (provided as a varchar) for a given address (provided as a varbinary).

SELECT 
    get_chain_explorer_address('ethereum', to) 
FROM ethereum.transactions 
limit 100

get_chain_explorer_tx_hash()¶

get_chain_explorer_tx_hash(varchar, varchar) → varchar

This function generates a URL for the explorer of a specified chain (provided as a varchar) for a given transaction hash (also provided as a varchar).

SELECT 
    get_chain_explorer_tx_hash('ethereum', cast(hash as varchar)) 
FROM ethereum.transactions 
limit 100

get_chain_explorer_tx_hash()¶

get_chain_explorer_tx_hash(varchar, varbinary) → varchar

This function generates a URL for the explorer of a specified chain (provided as a varchar) for a given transaction hash (provided as a varbinary).

SELECT 
    get_chain_explorer_tx_hash('ethereum', hash) 
FROM ethereum.transactions 
limit 100

get_chain_explorer()¶

get_chain_explorer(varchar) → varchar

This function returns the URL of the explorer for a specified chain (provided as a varchar).

SELECT 
    get_chain_explorer('ethereum')

all_evm_chains()¶

all_evm_chains() → array(varchar)

SELECT 
    all_evm_chains()

This function returns an array listing all the EVM chains available on Dune.