PostConditionType

Enum representing the type of a post-condition. Used internally for serialization.

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Usage

import { Pc, PostConditionType } from '@stacks/transactions';

const pc = Pc.principal('STB44HYPYAT2BB2QE513NSP81HTMYWBJP02HPGK6')
  .willSendEq(10000)
  .ustx();

pc.type; // 'stx-postcondition'
PostConditionType.STX; // 0x00, the wire value that tag serializes to

Reference Link

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Definition

enum PostConditionType {
  STX = 0x00,
  Fungible = 0x01,
  NonFungible = 0x02,
  Staking = 0x03,
  PoX = 0x04,
}

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Values

Value	Number	Description
STX	0x00	STX token post-condition
Fungible	0x01	Fungible token (SIP-010) post-condition
NonFungible	0x02	Non-fungible token (SIP-009) post-condition
Staking	0x03	Guards staking STX or modifying staked STX for a principal. Mirrors the STX shape: principal, a FungibleConditionCode, and an amount.
PoX	0x04	Guards PoX state changes that do not alter locking status. Carries a principal and a PoxConditionCode, with no amount.

See PostCondition for the object shape behind each of these.

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Availability

Member	Available from
MaybeSent (SIP-040)	@stacks/transactions 7.4.0, Stacks epoch 3.4
Staking and PoX (SIP-045)	@stacks/transactions 7.5.0, Stacks epoch 4.0

Staking and PoX post-conditions are specified in SIP-045 §3.4.3. The @stacks/transactions JSDoc labels these SIP-044; the two SIPs activated together.

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Related condition codes

The comparator paired with a post-condition depends on its type.

STX, Fungible, and Staking all use FungibleConditionCode:

enum FungibleConditionCode {
  Equal = 0x01,
  Greater = 0x02,
  GreaterEqual = 0x03,
  Less = 0x04,
  LessEqual = 0x05,
}

NonFungible uses NonFungibleConditionCode:

enum NonFungibleConditionCode {
  Sends = 0x10,
  DoesNotSend = 0x11,
  MaybeSent = 0x12,
}

MaybeSent was added by SIP-040. It always passes, and still counts as covering that NFT instance under Deny or Originator mode.

PoX uses PoxConditionCode:

enum PoxConditionCode {
  WillNotPerform = 0x30,
  MayPerform = 0x31,
  WillPerform = 0x32,
}