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ch12: Fix grammar, 'viable if R is revealed'

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Closes #262
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Will Binns 2017-03-19 08:42:28 -06:00
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@ -442,7 +442,7 @@ Alice's node then constructs an HTLC, payable to the hash +H+, with a 10 block r
Bob now has a commitment that if he is able to get the secret +R+ within the next 10 blocks, he can claim the 1.003 locked by Alice. With this commitment in hand, Bob's node constructs an HTLC on his payment channel with Carol. Bob's HTLC commits 1.002 bitcoin to hash +H+ for 9 blocks, which Carol can redeem if she has secret +R+. Bob knows that if Carol can claim his HTLC, she has to produce +R+. If Bob has +R+ in 9 blocks, he can use it to claim Alice's HTLC to him. He also makes 0.001 bitcoin for committing his channel balance for 9 blocks. If Carol is unable to claim his HTLC and he is unable to claim Alice's HTLC, everything reverts back to the prior channel balances and no one is at a loss. The channel balance between Bob and Carol is now: 2 to Carol, 0.998 to Bob, 1.002 committed by Bob to the HTLC.
Carol now has a commitment that if she gets +R+ within the next 9 blocks, she can claim 1.002 bitcoin locked by Bob. Now she can make an HTLC commitment on her channel with Diana. She commits an HTLC of 1.001 bitcoin to hash +H+, for 8 blocks, which Diana can redeem if she has secret +R+. From Carol's perspective, if this works she is 0.001 bitcoin better off and if it doesn't she loses nothing. Her HTLC to Diana is only viable +R+ is revealed, at which point she can claim the HTLC from Bob. The channel balance between Carol and Diana is now: 2 to Diana, 0.999 to Carol, 1.001 committed by Carol to the HTLC.
Carol now has a commitment that if she gets +R+ within the next 9 blocks, she can claim 1.002 bitcoin locked by Bob. Now she can make an HTLC commitment on her channel with Diana. She commits an HTLC of 1.001 bitcoin to hash +H+, for 8 blocks, which Diana can redeem if she has secret +R+. From Carol's perspective, if this works she is 0.001 bitcoin better off and if it doesn't she loses nothing. Her HTLC to Diana is only viable if +R+ is revealed, at which point she can claim the HTLC from Bob. The channel balance between Carol and Diana is now: 2 to Diana, 0.999 to Carol, 1.001 committed by Carol to the HTLC.
Finally, Diana can offer an HTLC to Eric, committing 1 bitcoin for 7 blocks to hash +H+. The channel balance between Diana and Eric is now: 2 to Eric, 1 to Diana, 1 committed by Diana to the HTLC.