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Build a transaction

post/api/v2/{coin}/wallet/{walletId}/tx/build

Build a transaction from the wallet using provided options. Use only with multisignature wallets. For TSS wallets, use Create transaction request. If you want to build, sign, and send all in one call, use Send transaction.

Path Parameters

  • coinstringRequired
    A cryptocurrency or token ticker symbol.
    Example: "btc"
  • walletIdstringRequired
    Example: "59cd72485007a239fb00282ed480da1f"
    Pattern: ^[0-9a-f]{32}$

Request Body

One of
type string
Required for transactions from TSS wallets. "acceleration" speeds up transactions with a certain nonce by adjusting the gas setting. "accountSet" is for XRP AccountSet transactions. "enabletoken" is for SOL. "stakingLock" and "stakingUnlock" are for Stacks delegations. "transfer" is for native-asset transfers. "trustline" is for Stellar trustline transactions. Possible types include: [acceleration, accountSet, enabletoken, stakingLock, stakingUnlock, transfer, transfertoken, trustline] For AVAX only, possible types include: [addValidator, export, import]
numBlocks integer
(BTC only) Used to estimate the fee rate by targeting confirmation within the given number of blocks. If neither "feeRate" nor "numBlocks" is specified, a block target of 2 is used by default. Can be limited with "maxFeeRate".
Minimum: >= 2
Maximum: <= 1000
feeRateOne of
Custom minimum fee rate in a coin's base unit per kilobyte (or virtual kilobyte)--for example, satoshis per kvByte or microAlgos per kByte. For xrp, it refers to the open ledger fee in drops (1 XRP = 1000000 drops) and the actual fee used is usually 4.5 times the open ledger fee. If the applied "feeRate" does not meet a coin's required minimum transaction fee amount, the minimum is still applied (for example, 1000 sat/kvByte , a flat 1000 microAlgos or a flat 10 drops of xrp).
maxFeeRateOne of
Custom upper limit for fee rate in a coin's base unit per kilobyte (or virtual kilobyte)--for example, satoshis per kvByte or microAlgos per kByte. "maxFeeRate" can be used to limit a fee rate estimate generated with "numBlocks".
feeMultiplierOne of
Custom multiplier for fee rate. Suggested to be used in conjunction with "maxFeeRate" for higher priority transactions, or transactions which may not be broadcast for some time after being built. Must be greater than 0.
minConfirms integer
The unspent selection for the transaction will only consider unspents with at least this many confirmations to be used as inputs. Does not apply to change outputs unless used in combination with "enforceMinConfirmsForChange".
enforceMinConfirmsForChange boolean
When set to true, will enforce minConfirms for change outputs. Defaults to false.
Default: false
gasPrice
Custom gas price to be used for sending the transaction. Only for ETH and ERC20 tokens.
eip1559 object
maxPriorityFeePerGas
Max priority tip price for EIP1559 transactions. Only for ETH and ERC20 tokens.
maxFeePerGas
Max total gasPrice for EIP1559 transactions. Only for ETH and ERC20 tokens.
gasLimit
Custom gas limit to be used for sending the transaction. Only for ETH and ERC20 tokens.
targetWalletUnspents integer
Specifies the minimum count of good-sized unspents to maintain in the wallet. Change splitting ceases when the wallet has "targetWalletUnspents" good-sized unspents. **Note**: Wallets that continuously send a high count of transactions will automatically split large change amounts into multiple good-sized change outputs while they have fewer than "targetWalletUnspents" good-sized unspents in their unspent pool. Breaking up large unspents helps to reduce the amount of unconfirmed funds in flight in future transactions, and helps to avoid long chains of unconfirmed transactions. This is especially useful for newly funded wallets or recently refilled send-only wallets.
Default: 1000
minValue
Ignore unspents smaller than this amount of base units (e.g. satoshis). For doge, only string is allowed.
maxValue
Ignore unspents larger than this amount of base units (e.g. satoshis). For doge, only string is allowed.
sequenceId string
A "sequenceId" is a unique and arbitrary wallet identifier applied to transfers and transactions at creation. It is optional but highly recommended. With a "sequenceId" you can easily reference transfers and transactions&mdash;for example, to safely retry sending. Because the system only confirms one send request per "sequenceId" (and fails all subsequent attempts), you can retry sending without the risk of double spending. The "sequenceId" is only visible to users on the wallet and is not shared publicly.
nonce string
(DOT only) A nonce ID is a number used to protect private communications by preventing replay attacks. This is an advanced option where users can manually input a new nonce value in order to correct or fill in a missing nonce ID value.
Example: 2000000
Match pattern: ^-?\d+$
noSplitChange boolean
Set "true" to disable automatic change splitting. Also see: "targetWalletUnspents"
Default: false
unspents array[string]
Used to explicitly specify the unspents to be used in the input set in the transaction. Each unspent should be in the form "prevTxId:nOutput".
changeAddress string
Specifies a custom destination address for the transaction's change output(s)
Max length: <= 250 characters
Example: 2MvrwRYBAuRtPTiZ5MyKg42Ke55W3fZJfZS
instant boolean
(DASH only) Specifies whether or not to use Dash's "InstantSend" feature when sending a transaction.
memo object
Memo for Stellar or EOS. Type is only required for memos in Stellar transactions. The memo contains optional extra information that can also be used to identify payments in Stellar or EOS.
type string
value string
comment string
Optional metadata (only persisted in BitGo) to be applied to the transaction. Use this to add transaction-specific information such as the transaction's purpose or another identifier that you want to reference later. The value is shown in the UI in the transfer listing page.
Max length: <= 256 characters
destinationChain string
(AVAXC and AVAXP only) Destination chain for an AVAX import/export transaction. One of [P, C].
sourceChain string
(AVAXC and AVAXP only) Source chain for an AVAX import/export transaction. One of [P, C].
addressType string
The type of address to create for change. One of "p2sh", "p2shP2wsh", and "p2wsh".
startTime string
The start of the validity window for the transaction. Only supported by HBAR
consolidateId string
(ALGO/TEZOS only) Consolidation ID of this consolidation transaction.
Example: 59cd72485007a239fb00282ed480da1f
Match pattern: ^[0-9a-f]{32}$
lastLedgerSequence integer
(XRP only) Absolute max ledger the transaction should be accepted in, whereafter it will be rejected
ledgerSequenceDelta integer
(XRP only) Relative ledger height (in relation to the current ledger) that the transaction should be accepted in, whereafter it will be rejected
validFromBlock integer
Optional block this transaction is valid from
validToBlock integer
Optional block this transaction is valid until
trustlines array[object]
List of trustlines to manage on the account. Available for Stellar.
token string
One of the supported coin types for Stellar tokens listed in [Coin-specific-implementation](#tag/Coin-specific-implementation)
Example: txlm:BST-GBQTIOS3XGHB7LVYGBKQVJGCZ3R4JL5E4CBSWJ5ALIJUHBKS6263644L
action
Allowed values: add remove
limit string
String representation of the amount to limit in base units (stroops)
Example: 2000000
Match pattern: ^-?\d+$
stakingOptionsAny of
Required object for staking. Only for CSPR and STX.
amount
Required for CSPR. String representation of the amount to stake or unstake in base units (motes).
validator
Required for CSPR. The validator address used to delegate or undelegate.
messageKey string
Optional parameter that takes a hexadecimal value to set "messagekey" for an XRP "accountSet" transaction. Recipients field should be empty when "messageKey" is set.
reservation object
Optional parameter for UTXO coins to automatically reserve the unspents that are used in the build. Useful for Cold wallets. If using, must set expireTime.
expireTime string <date-time>
Required. The time that the unspent reservations should expire.
recipients array[object] required
A list of recipient addresses and amounts. Must be present but empty for child-pays-for-parent transactions.
amount
String representation of the amount to send in base units (satoshis/litoshis/zatoshis/duffs). For doge, only string is allowed.
address
The address to send to
memoAny of
A memo for this specific transaction. This format is only available for Stacks.
txFormat string
Format of the returned transaction hex serialization. "legacy" for serialized transaction in custom bitcoinjs-lib format. "psbt" for BIP174 serialized transaction
Allowed values: legacy psbt
Default: legacy
Example: legacy
javascript
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let params = {
  recipients: [
    {
      amount: 0.01 * 1e8,
      address: '2NFfxvXpAWjKng7enFougtvtxxCJ2hQEMo4',
    },
  ],
};
wallet.prebuildTransaction(params).then(function (transaction) {
  // print transaction details
  console.dir(transaction);
});

200 Response

keyDerivationPath string

400 Response

One of
error string required
Human-readable error message
requestId string required
Client request id
context object
Properties that apply to a specific error name
name string required
Error code