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handle indexed parameters

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Nanolucas 2021-01-09 18:10:54 +01:00
parent 125aea05cd
commit 46dc78e0d6
1 changed files with 26 additions and 8 deletions
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34
src/Contract.php
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@ -891,9 +891,23 @@ class Contract
} }
} }
//retrieve event input types and names from the contract abi //indexed and non-indexed event parameters must be treated separately
$eventParameterTypes = array_column($this->events[$eventName]['inputs'], 'type'); //indexed parameters are stored in the 'topics' array
$eventParameterNames = array_column($this->events[$eventName]['inputs'], 'name'); //non-indexed parameters are stored in the 'data' value
$eventParameterNames = [];
$eventParameterTypes = [];
$eventIndexedParameterNames = [];
$eventIndexedParameterTypes = [];
foreach ($this->events[$eventName]['inputs'] as $input) {
if ($input['indexed']) {
$eventIndexedParameterNames[] = $input['name'];
$eventIndexedParameterTypes[] = $input['type'];
} else {
$eventParameterNames[] = $input['name'];
$eventParameterTypes[] = $input['type'];
}
}
//filter through log data to find any logs which match this event (topic) from //filter through log data to find any logs which match this event (topic) from
//this contract, between these specified blocks (defaulting to the latest block only) //this contract, between these specified blocks (defaulting to the latest block only)
@ -903,21 +917,25 @@ class Contract
'topics' => [$this->ethabi->encodeEventSignature($this->events[$eventName])], 'topics' => [$this->ethabi->encodeEventSignature($this->events[$eventName])],
'address' => $this->toAddress 'address' => $this->toAddress
], ],
function ($error, $result) use (&$eventLogData, $eventParameterTypes, $eventParameterNames) { function ($error, $result) use (&$eventLogData, $eventParameterTypes, $eventParameterNames, $eventIndexedParameterTypes, $eventIndexedParameterNames) {
if ($error !== null) { if ($error !== null) {
throw new RuntimeException($error->getMessage()); throw new RuntimeException($error->getMessage());
} }
foreach ($result as $object) { foreach ($result as $object) {
//decode the data from the log into the expected formats //decode the data from the log into the expected formats, with its corresponding named key
$decodedData = $this->ethabi->decodeParameters($eventParameterTypes, $object->data); $decodedData = array_combine($eventParameterNames, $this->ethabi->decodeParameters($eventParameterTypes, $object->data));
//decode the indexed parameter data
for ($i = 0; $i < count($eventIndexedParameterNames); $i++) {
$decodedData[$eventIndexedParameterNames[$i]] = $this->ethabi->decodeParameters([$eventIndexedParameterTypes[$i]], $object->topics[$i + 1])[0];
}
//include block metadata for context, along with event data //include block metadata for context, along with event data
$eventLogData[] = [ $eventLogData[] = [
'blockHash' => $object->blockHash, 'blockHash' => $object->blockHash,
'blockNumber' => hexdec($object->blockNumber), 'blockNumber' => hexdec($object->blockNumber),
//return the data with its named array keys 'data' => $decodedData
'data' => array_combine($eventParameterNames, $decodedData)
]; ];
} }
}); });