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block: change exponent offset to avoid subtraction

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Daniel Cousens 2017-03-28 20:28:48 +11:00 • committed by Daniel Cousens
parent 29316a2fbc
commit 35bbe11055
1 changed files with 2 additions and 2 deletions
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4
src/block.js
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@ -131,11 +131,11 @@ Block.prototype.toHex = function (headersOnly) {
Block.calculateTarget = function (bits) {
var exponent = ((bits & 0xff000000) >> 24) - 3
var mantissa = bits & 0x007fffff
var i = 31 - exponent
var i = 28 - exponent
var target = new Buffer(32)
target.fill(0)
target.writeUInt32BE(mantissa, i - 3)
target.writeUInt32BE(mantissa, i)
return target
}