i created a variable called startDate using now in a smart contract.

when reading it using Contract.startDate() it returns BigNumber { s: 1, e: 9, c: [ 1530272788 ] }

how do i convert this to an Interger (or anything else i can work with)? toNumber() and toString() wont work.

edit: toNumber() already worked on "bigger" bugnumbers (with e>10), just not with the bigNumber returned by startDate

  • Try valueOf() or toString() .
    – Henk
    Jun 29, 2018 at 12:21
  • already said toString() doesnt work. returns '[object Promise]' valueOf() returns the same BigNumber again
    – qwpeo
    Jun 29, 2018 at 12:26

1 Answer 1


toNumber() is right, but it sounds like you have a Promise that will resolve to a BigNumber. If so, this should work:

Contract.startDate().then(date => {
  • edit: nvm, I somehow copied it wrong. this actually works. thank you!
    – qwpeo
    Jun 29, 2018 at 13:11

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