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ParityのRPCリクエストでParse errorが返る

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ParityでJSON-RPCリクエストを送った際にParse errorが返ることがある。

現象

リクエスト

curl --data \
  '{"method":"personal_unlockAccount","params":["0xbdb5232157860e22120cd9b9b847ca1024cdb95f","password", 0x3E8],"id":1,"jsonrpc":"2.0"}' \
  -H "Content-Type: application/json" -X POST localhost:8545

エラー

{"jsonrpc":"2.0","error":{"code":-32700,"message":"Parse error"},"id":null}

原因と対策

hexの値は文字列として渡す必要がある。

修正後のリクエスト

curl --data \
  '{"method":"personal_unlockAccount","params":["0xbdb5232157860e22120cd9b9b847ca1024cdb95f","password", "0x3E8"],"id":1,"jsonrpc":"2.0"}' \
  -H "Content-Type: application/json" -X POST localhost:8545

環境

  • Parity: Parity/v1.11.0-beta-62ccdd7-20180508/x86_64-linux-gnu/rustc1.25.0
  • Ubuntu 16.4 LTS: Linux ip-10-1-0-38 4.4.0-1041-aws #50-Ubuntu SMP Wed Nov 15 22:18:17 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
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