Definition: [
"autonomous agent",
{
"doc_url": "https://oswap.io/pair.json",
"init": "{
$bounceFees = 1e4;
$minLiquidity = 1e3;
$factory = params.factory;
$asset0 = params.asset0;
$asset1 = params.asset1;
$asset = var[$factory]['assets.' || this_address];
$supply = var['supply'];
$amount0 = trigger.output[[asset=$asset0]];
$amount1 = trigger.output[[asset=$asset1]];
$amount0NoFees = ($asset0 == 'base') ? $amount0 - $bounceFees : $amount0;
$amount1NoFees = ($asset1 == 'base') ? $amount1 - $bounceFees : $amount1;
$reserve0 = balance[$asset0] - $amount0;
$reserve1 = balance[$asset1] - $amount1;
if (trigger.data.to AND !is_valid_address(trigger.data.to)) bounce('invalid recipient address');
$to = trigger.data.to OTHERWISE trigger.address;
$deadline = trigger.data.deadline;
if ($deadline AND $deadline < timestamp) bounce('expired');
}",
"messages": {
"cases": [
{
"if": "{!$asset AND trigger.data.initialize AND trigger.address == $factory}",
"messages": [
{
"app": "asset",
"payload": {
"is_private": false,
"is_transferrable": true,
"auto_destroy": false,
"fixed_denominations": false,
"issued_by_definer_only": true,
"cosigned_by_definer": false,
"spender_attested": false
}
},
{
"app": "payment",
"payload": {
"asset": "base",
"outputs": [
{
"address": "{$factory}"
}
]
}
},
{
"app": "data",
"payload": {
"finalize": "1"
}
},
{
"app": "state",
"state": "{response['type'] = 'initialize';}"
}
]
},
{
"if": "{
$asset
AND $amount0NoFees > 0
AND $amount1NoFees > 0
AND ($amount0NoFees * $amount1NoFees) >= $minLiquidity
}",
"init": "{
if ($reserve1 == 0 OR $reserve0 == 0) {
$minted = balance[$asset0];
return;
}
$ratio = $reserve1 / $reserve0;
$expectedAmount1 = round($ratio * $amount0);
if ($expectedAmount1 != $amount1)
bounce('wrong ratio of amounts, expected ' || $expectedAmount1 || ' of ' || $asset1);
$investorShare = $amount0 / $reserve0;
$minted = round($investorShare * $supply);
}",
"messages": [
{
"app": "payment",
"payload": {
"asset": "{$asset}",
"outputs": [
{
"address": "{$to}",
"amount": "{$minted}"
}
]
}
},
{
"app": "state",
"state": "{
$comFees = unit[response_unit].headers_commission + unit[response_unit].payload_commission;
var['reserve0'] = ($asset0 == 'base') ? balance[$asset0] - $comFees : balance[$asset0];
var['reserve1'] = ($asset1 == 'base') ? balance[$asset1] - $comFees : balance[$asset1];
var['supply'] += $minted;
response['type'] = 'mint';
}"
}
]
},
{
"if": "{$asset AND trigger.output[[asset=$asset]]}",
"init": "{
$burned = trigger.output[[asset=$asset]];
$share = $burned / $supply;
$minted0 = round($share * $reserve0);
$minted1 = round($share * $reserve1);
}",
"messages": [
{
"app": "payment",
"payload": {
"asset": "{$asset0}",
"outputs": [
{
"address": "{$to}",
"amount": "{$minted0}"
}
]
}
},
{
"app": "payment",
"payload": {
"asset": "{$asset1}",
"outputs": [
{
"address": "{$to}",
"amount": "{$minted1}"
}
]
}
},
{
"app": "state",
"state": "{
$comFees = unit[response_unit].headers_commission + unit[response_unit].payload_commission;
var['reserve0'] = (($asset0 == 'base') ? balance[$asset0] - $comFees : balance[$asset0]) - $minted0;
var['reserve1'] = (($asset1 == 'base') ? balance[$asset1] - $comFees : balance[$asset1]) - $minted1;
var['supply'] -= $burned;
response['type'] = 'burn';
}"
}
]
},
{
"if": "{
$asset0ToAsset1 = ($amount0NoFees > 0 AND $amount1NoFees <= 0);
$asset1ToAsset0 = ($amount1NoFees > 0 AND $amount0NoFees <= 0);
$asset AND $supply AND ($asset0ToAsset1 || $asset1ToAsset0)
}",
"init": "{
$toAsset = trigger.data.toAsset;
$amountOutMin = trigger.data.amountOutMin;
$in = $asset0ToAsset1 ? '0' : '1';
$out = $asset0ToAsset1 ? '1' : '0';
$numerator = ${'amount' || $in} * ${'reserve' || $out} * 997;
$denominator = ${'reserve' || $in} * 1000 + ${'amount' || $in} * 997;
$amount = round($numerator / $denominator);
if ($amountOutMin AND $amount < $amountOutMin) bounce('insufficient output amount');
$pair = var[$factory]['all_pairs.' || ${'asset' || $out} || '_' || $toAsset];
if ($toAsset AND !$pair) bounce('invalid asset');
$address = $toAsset ? $pair : $to;
}",
"messages": [
{
"app": "payment",
"payload": {
"asset": "{${'asset' || $out}}",
"outputs": [
{
"address": "{$address}",
"amount": "{$amount}"
}
]
}
},
{
"if": "{$toAsset}",
"app": "data",
"payload": {
"to": "{$to}"
}
},
{
"app": "state",
"state": "{
$comFees = unit[response_unit].headers_commission + unit[response_unit].payload_commission;
$reserve0NoCom = ($asset0 == 'base') ? balance[$asset0] - $comFees : balance[$asset0];
$reserve1NoCom = ($asset1 == 'base') ? balance[$asset1] - $comFees : balance[$asset1];
var['reserve0'] = $reserve0NoCom - ((${'asset' || $out} == $asset0) ? $amount : 0);
var['reserve1'] = $reserve1NoCom - ((${'asset' || $out} == $asset1) ? $amount : 0);
response['type'] = 'swap';
}"
}
]
}
]
}
}
]