add require('bignum') in key
add require('bignum') in key

eXcomm/bitcore,MulticoinExplorer/bitcore,Bushstar/bollycore,Bushstar/bitcore,eXcomm/bitcore,TOMOAKI12345/bitcore,Bushstar/feathercore,KainiIndustries/hullcore,TeamPiggyCoin/PiggyCore,iobond/bitcore,williamcotton/bitcore,maraoz/coinforge,TOMOAKI12345/bitcore,initaldk/bitcore,genecyber/bitcore,iobond/bitcore,bitjson/bitcore,UdjinM6/darkcore,Bushstar/bollycore,MulticoinExplorer/bitcore,KainiIndustries/hullcore,haobtc/bitcore,KainiIndustries/hullcore,KainiIndustries/hullcore,UdjinM6/bitcore-dash,Bushstar/talentcore,Bushstar/talentcore,martindale/bitcore,sEpuLchEr/bitcore,Bushstar/talentcore,iobond/bitcore,Kefkius/clamcore,bitpay/bitcore,Bushstar/bitcore,maraoz/coinforge,Bushstar/bitcore,habibmasuro/reddcore,Bushstar/bitcore,UdjinM6/darkcore,jcvernaleo/bitcore,genecyber/bitcore,iobond/bitcore,pnagurny/bitcore,haobtc/bitcore,bankonme/bitcore,adjoinant/bitcore,habibmasuro/reddcore,Bushstar/feathercore,sEpuLchEr/bitcore,phplaboratory/bitcore,MulticoinExplorer/bitcore,iobond/bitcore,Bushstar/feathercore,adjoinant/bitcore,Bushstar/bitcore,casinocoin/csc-bitcore-v0.1,KainiIndustries/hullcore,pembo210/Litecore,UdjinM6/darkcore,UdjinM6/darkcore,GroestlCoin/groestlcore,TeamPiggyCoin/PiggyCore,janko33bd/bitcore,Bushstar/talentcore,eordano/bitcore,UdjinM6/darkcore,MonetaryUnit/bitcore,pnagurny/bitcore,litecoin-project/litecore,initaldk/bitcore,janko33bd/bitcore,Bushstar/feathercore,bitjson/bitcore,sEpuLchEr/bitcore,casinocoin/csc-bitcore-v0.1,bitpay/bitcore,eordano/bitcore,haobtc/bitcore,casinocoin/csc-bitcore-v0.1,olalonde/bitcore,bankonme/bitcore,UdjinM6/darkcore,MulticoinExplorer/bitcore,martindale/bitcore,KainiIndustries/hullcore,martindale/bitcore,habibmasuro/reddcore,sEpuLchEr/bitcore,pembo210/Litecore,habibmasuro/reddcore,haobtc/bitcore,bitpay/bitcore,braydonf/bitcore,bitpay/bitcore,bilthon/bitcore,MulticoinExplorer/bitcore,olalonde/bitcore,jcvernaleo/bitcore,daxxog/clamcore,Kefkius/clamcore,lekkas/bitcore,sEpuLchEr/bitcore,litecoin-project/litecore,Kefkius/clamcore,casinocoin/csc-bitcore-v0.1,bitjson/bitcore,bilthon/bitcore,daxxog/clamcore,Bushstar/bollycore,casinocoin/csc-bitcore-v0.1,Kefkius/clamcore,pembo210/Litecore,bitjson/bitcore,MonetaryUnit/bitcore,Bushstar/bollycore,martindale/bitcore,habibmasuro/reddcore,phplaboratory/bitcore,williamcotton/bitcore,casinocoin/csc-bitcore-v0.1,haobtc/bitcore,Kefkius/clamcore,braydonf/bitcore,pembo210/Litecore,lekkas/bitcore