Skip to content

Latest commit

 

History

History
143 lines (117 loc) · 2.86 KB

burn.md

File metadata and controls

143 lines (117 loc) · 2.86 KB
description
Burn Pool liquidity assets in exchange for removing assets from the Pool.

Burn

Transaction Group

0. Pay - pay fees in Algo from Pooler to Pool

  • fees to cover Tx 1,2,3
  • Signed by Pooler
{
  "txn": {
  "type": "pay",
  "rcv": "{POOL_ADDRESS}",
  "snd": "{POOLER_ADDRESS",
  "amt": 3000,
  "fee": 1000,
  ...
  },
  "sig": "{POOLER_SIG}",
}
  1. App Call - NoOp call to Validator App with args ['burn'], with Pooler account
{
  "txn": {
    "type": "appl",
    "snd": "{POOL_ADDRESS}",
    "apid": {VALIDATOR_APP_ID},
    "apan": 0, // OnComplete: NoOp
    "apaa": ['YnVybg=='], // ['burn']
    "apas": [{ASSET1_ID}, {ASSET2_ID}, {LIQUIDITY_ASSET_ID}], // or just [{ASSET1_ID}, {LIQUIDITY_ASSET_ID}] if asset 2 is Algo
    "apat": [{POOLER_ADDRESS}],
    "fee": 1000,
    ...
  },
  "lsig": "{POOL_LOGICSIG}",
}

2. AssetTransfer - Transfer of asset 1 from Pool to Pooler

  • Signed by Pool LogicSig
  • Amount is minimum expected amount allowing for slippage
{
  "txn": {
    "type": "axfer",
    "arcv": "{POOLER_ADDRESS}",
    "snd": "{POOL_ADDRESS}",
    "xaid": {ASSET_1_ID},
    "aamt": {ASSET_1_AMOUNT},
    "fee": 1000,
    ...
  },
  "lsig": "{POOL_LOGICSIG}",
}

3. (a) AssetTransfer - Transfer of asset 2 from Pool to Pooler

  • If asset 2 is an ASA
  • Signed by Pool LogicSig
  • Amount is minimum expected amount allowing for slippage
{
  "txn": {
    "type": "axfer",
    "arcv": "{POOLER_ADDRESS}",
    "snd": "{POOL_ADDRESS}",
    "xaid": {ASSET_2_ID},
    "aamt": {ASSET_2_AMOUNT},
    "fee": 1000,
    ...
  },
  "lsig": "{POOL_LOGICSIG}",
}

3. (b) Pay - Transfer of Algo from Pool to Pooler

  • If asset 2 is Algo
  • Signed by Pool LogicSig
  • Amount is minimum expected amount allowing for slippage
{
  "txn": {
    "type": "pay",
    "rcv": "{POOLER_ADDRESS}",
    "snd": "{POOL_ADDRESS"},
    "amt": {ASSET_2_AMOUNT},
    "fee": 1000,
    ...
  },
  "lsig": "{POOL_LOGICSIG}",
}

4. AssetTransfer - Transfer of liquidity token asset from Pooler to Pool

  • Signed by Pooler
{
  "txn": {
    "type": "axfer",
    "arcv": "{POOL_ADDRESS}",
    "snd": "{POOLER_ADDRESS}",
    "xaid": {LIQUIDITY_ASSET_ID},
    "aamt": {LIQUIDITY_ASSET_AMOUNT},
    "fee": 1000,
    ...
  },
  "sig": "{POOLER_SIG}",
}

Validator App State Changes

Global State

None

Pool Account Local State

  • o{LIQUIDITY_ASSET_ID}: {int} // total outstanding unredeemed liquidity asset amount
  • o{ASSET1_ID}: {int} // total outstanding unredeemed asset 1 amount
  • o{ASSET2_ID}: {int} // total outstanding unredeemed asset 2 amount

Pooler Account Local State

  • {POOL_ADDRESS}e{LIQUIDITY_ASSET_ID}: {int} // excess liquidity asset amount available for redemption
  • {POOL_ADDRESS}e{ASSET1_ID}: {int} // excess asset 1 amount available for redemption
  • {POOL_ADDRESS}e{ASSET2_ID}: {int} // excess asset 2 amount available for redemption