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Swap
Swap one asset (ASA or Algo) for another with the Pool.
Transaction Group
0. Pay - pay fees in Algo from Swapper to Pool
fees to cover Tx 1,2
Signed by Swapper
1
{
2
  "txn": {
3
    "type": "pay",
4
    "rcv": "{POOL_ADDRESS}",
5
    "snd": "{SWAPPER_ADDRESS",
6
    "amt": 2000,
7
    "fee": 1000,
8
    ...
9
  },
10
  "sig": "{SWAPPER_SIG}",
11
}
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1.App Call - NoOp call to Validator App with args ['swap', (fixed-input) or 'fo' (fixed-output)], with Swapper account
Signed by Pool LogicSig
Argument 1 'fi' specifies that the input (sell) is fixed but the output may vary with slippage
Argument 1 'fo' specifies that the output (buy) is fixed but the input may vary with slippage
1
{
2
  "txn": {
3
    "type": "appl",
4
    "snd": "{POOL_ADDRESS}",
5
    "apid": {VALIDATOR_APP_ID},
6
    "apan": 0, // OnComplete: NoOp
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    "apaa": ['c3dhcA==', 'Zmk=' or 'Zm8='], // ['swap', 'fi' (fixed-input) or 'fo' (fixed-output)]
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    "apat": [{SWAPPER_ADDRESS}],
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    "fee": 1000,
10
    ...
11
  },
12
  "lsig": "{POOL_LOGICSIG}",
13
}
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2. (a) AssetTransfer - Transfer of sell asset from Swapper to Pool
If sell asset is an ASA
Signed by Swapper
1
{
2
  "txn": {
3
    "type": "axfer",
4
    "arcv": "{POOL_ADDRESS}",
5
    "snd": "{SWAPPER_ADDRESS}",
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    "xaid": {SELL_ASSET_ID},
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    "aamt": {SELL_ASSET_AMOUNT},
8
    "fee": 1000,
9
    ...
10
  },
11
  "sig": "{SWAPPER_SIG}",
12
}
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2. (b) Pay - Transfer of Algo from Swapper to Pool
If sell asset is Algo
Signed by Swapper
1
{
2
  "txn": {
3
    "type": "pay",
4
    "rcv": "{POOL_ADDRESS}",
5
    "snd": "{SWAPPER_ADDRESS}",
6
    "amt": {SELL_ASSET_AMOUNT},
7
    "fee": 1000,
8
    ...
9
  },
10
  "sig": "{SWAPPER_SIG}",
11
}
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3. (a) AssetTransfer - Transfer of buy asset from Pool to Swapper
If buy asset is an ASA
Signed by Pool LogicSig
1
{
2
  "txn": {
3
    "type": "axfer",
4
    "arcv": "{SWAPPER_ADDRESS}",
5
    "snd": "{POOL_ADDRESS}",
6
    "xaid": {BUY_ASSET_ID},
7
    "aamt": {BUY_ASSET_AMOUNT},
8
    "fee": 1000,
9
    ...
10
  },
11
  "lsig": "{POOL_LOGICSIG}",
12
}
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3. (b) Pay - Transfer of buy asset from Pool to Swapper
If buy asset is Algo
Signed by Pool LogicSig
1
{
2
  "txn": {
3
    "type": "pay",
4
    "rcv": "{SWAPPER_ADDRESS}",
5
    "snd": "{POOL_ADDRESS}",
6
    "amt": {BUY_ASSET_AMOUNT},
7
    "fee": 1000,
8
    ...
9
  },
10
  "lsig": "{POOL_LOGICSIG}",
11
}
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Validator App State Changes
Global State
None
Pool Account Local State
o{ASSET1_ID}: {int} // total outstanding unredeemed asset 1 amount
o{ASSET2_ID}: {int} // total outstanding unredeemed asset 2 amount
p: {int} // total unclaimed protocol fees amount
Swapper Account Local State
{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
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Last modified 9mo ago
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Contents
Transaction Group