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AliceKeys[4]); validateTx(BR2b, Blocks); Blocks.push( createNewBlock([BR2b], Blocks) ); 19. Build and Spend HBR1b In the same way, Alice can sign HBR1b using disclosed Bob’s private key. And she receive Bob’s BTC immediately. let HBR1b = new Transaction( [ new TxIn( c2bHash, 2, { type: 'BR', sig: [