OutOfMemoryError when decoding Byte Param
jondoe1337 opened this issue ยท 2 comments
Sorry for spamming issues with decoding bugs - however after #1196 I switched the CallTransaction API and bumped into the next error.
I tried to decode parse the event of a log using the ABI of the contract.
Example Log:
{
"address": "0x2Cc114bbE7b551d62B15C465c7bdCccd9125b182",
"topics": [
"0xe19260aff97b920c7df27010903aeb9c8d2be5d310a2c67824cf3f15396e4c16",
"0x000000000000000000000000c9ca2e8db68ffeb21978ea30a0b762f0ad2d445b",
"0x000000000000000000000000d71ebe710322f0a95504cdd12294f613536204ce",
"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
],
"data": "0x00000000000000000000000000000000000000000000000000002d7982473f00",
"blockNumber": 6371707,
"transactionHash": "0x45f753484d9c18890bf75da64ca6ea40996fb76c5e08456a4eeae79354622e64",
"transactionIndex": 1,
"blockHash": "0xafb78a2a224bdb3fea88020eb22e72c3281f2922626a63a57e87da164f506664",
"logIndex": 0,
"removed": false,
"id": "log_c3de21c8",
"timestamp": 1537521693
}
ABI:
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s":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"},{"name":"_data","type":"bytes"},{"name":"_custom_fallback","type":"string"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"target","type":"address"},{"indexed":false,"name":"frozen","type":"bool"}],"name":"FrozenFunds","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"target","type":"address"},{"indexed":false,"name":"locked","type":"uint256"}],"name":"LockedFunds","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":false,"name":"amount","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"amount","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[],"name":"MintFinished","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"},{"indexed":true,"name":"data","type":"bytes"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"}]
The critical part is where the decode method is called: org.ethereum.solidity.SolidityType.BytesType.decode(byte[], int)
and len is interpreted as '1569039472' which then creates an Array with that number of bytes (minus offset of 32) ๐ which then lets the jvm explode.
Increasing heap space should not be a solution.
I guess we missed that part of spec:
If arrays (including string and bytes) are used as indexed arguments, the Keccak-256 hash of it is stored as topic instead.
Sorry for spamming issues
@jondoe1337 These are real issues, so thanks a lot :)