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canton-network-docs/Release NotesWallet SDK

0.21.0

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0.21.0

Released on February 6th, 2026
  • pagination support for listing UTXOs
previously listHoldingsUtxo was limited to the ledger API upper bound of 200 items per request. For parties with a large number of holdings this meant not all UTXOs would be returned. A new optional continueUntilCompletion parameter has been added that when set to true will automatically page through all results, making it possible to reliably work with parties that hold more than 200 UTXOs. 
// fetch only the first page (default behaviour, up to 200 items)
const utxos = await sdk.tokenStandard?.listHoldingsUtxo()

// fetch ALL utxos regardless of how many there are
const allUtxos = await sdk.tokenStandard?.listHoldingsUtxo(
    true,  // include locked
    undefined, // offset
    undefined, // limit
    true   // continueUntilCompletion
)
  • cost estimation now returned when using Canton 3.4
when calling prepareSubmission against a Canton 3.4 participant the costEstimation field was previously dropped from the response. The response type has been corrected and the cost estimation is now correctly surfaced. 
const prepared = await sdk.userLedger?.prepareSubmission(
    transferCommand,
    keyPairSender.publicKey
)

// costEstimation is now available when running against Canton 3.4
logger.info(prepared?.costEstimation)