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I'm having problems with Error: Invalid number of arguments to Solidity function. Basically, the problem comes when I call sendTransaction with an event handler. i.e. here's the code after hooking up a Solidity event:

// premisObject was setup earlier to point at the Abi at the contract's deployed address const premisObject = this.premisObject // rightsSetRights has been hooked up to the required event const rightsSetRights = this.rightsSetRights rightsSetRights.watch(function (error, result) { if (!error) { const index = result.args._index const hash = result.args._hash premisObject._setRights(hash,index, {gas: 200000})) } else { console.error(result) } })

That call to premisObject._setRights(hash,index, {gas: 200000})) fires the error. If I make the same call outside of the event handler:

premisObject._setRights(this.state.hash, 0, {gas: 200000})

....works just fine. I need to call premisObject._setRights inside that event handler, somehow, because that's when I know the value of the required index. Any ideas what's going on? Or perhaps you've got a cunning plan which means I can circumvent the issue?

  • Did you check your parameters index, hash and premisObject are correct? Also I think some parameters my need a '0x' in front. Also if premisObject is a contract it doesn't seems like a good idea to have a public method name starting with _. – Ismael Jun 15 '17 at 3:25
  • Yup, all checked, and all seem correct. I'm currently circumventing the problem by redesigning my dAapp by generating the required index, rather than getting it from the event handler. – glowkeeper Jun 15 '17 at 10:29
  • ps. it isn't _setRights - it's setRights (that was a transcription error) ;) – glowkeeper Jun 15 '17 at 11:14
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I never got to the bottom of this - I ended up redesigning my dApp so that I set, rather than get, the index.

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