ethQuery.getBlockByNumber(blockRef, false, (err, blockParams) => {
if (err) return end(err)
// create block
const block = blockFromRpc(blockParams)
runVm(req, block, (err, results) => {
if (err) return end(err)
const returnValue = results.vm.return ? '0x' + results.vm.return.toString('hex') : '0x'
res.result = returnValue
end()
})
})
function getSigner(block) {
var sealers = block.extraData
if (sealers.length <= 130)
return undefined
var sig = ethUtils.fromRpcSig('0x' + sealers.substring(sealers.length - 130, sealers.length)) // remove signature
block.extraData = block.extraData.substring(0, block.extraData.length - 130)
var blk = ethBlock(block)
blk.header.difficulty[0] = block.difficulty
var sigHash = ethUtils.sha3(blk.header.serialize())
var pubkey = ethUtils.ecrecover(sigHash, sig.v, sig.r, sig.s)
return ethUtils.pubToAddress(pubkey).toString('hex')
}