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Support bits! #2

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15 changes: 10 additions & 5 deletions lib/satoshi.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ class Satoshi
UNIT_DENOMINATIONS = {
btc: 8,
mbtc: 5,
bits: 2,
satoshi: 0
}

Expand All @@ -29,6 +30,10 @@ def to_mbtc(as: :number)
to_denomination(UNIT_DENOMINATIONS[:mbtc], as: as)
end

def to_bits(as: :number)
to_denomination(UNIT_DENOMINATIONS[:bits], as: as)
end

def to_unit(as: :number)
to_denomination(UNIT_DENOMINATIONS[@to_unit], as: as)
end
Expand All @@ -37,7 +42,7 @@ def to_i
return 0 if @value.nil?
@value
end
alias :satoshi_value :to_i
alias :satoshi_value :to_i

def value=(n)
n = 0 if n.nil?
Expand Down Expand Up @@ -89,7 +94,7 @@ def coerce(other)
end

private

def to_denomination(digits_after_delimiter, as: :number)
sign = @value < 0 ? -1 : 1
val = @value.abs
Expand All @@ -101,7 +106,7 @@ def to_denomination(digits_after_delimiter, as: :number)
result.reverse!
result = result.sub(/\A0*/, '').sub(/0*\Z/, '') # remove zeros on both sides
if as == :number
result.to_f*sign
result.to_f*sign
else
if result == '.'
result = '0.0'
Expand All @@ -114,9 +119,9 @@ def to_denomination(digits_after_delimiter, as: :number)

def convert_to_satoshi(n)
n = ("%.#{UNIT_DENOMINATIONS[@from_unit]}f" % n) # otherwise we might see a scientific notation
n = n.split('.')
n = n.split('.')
n[1] ||= '' # in the case where there's no decimal part
n[1] += "0"*(UNIT_DENOMINATIONS[@from_unit]-n[1].length) if n[1]
n[1] += "0"*(UNIT_DENOMINATIONS[@from_unit]-n[1].length) if n[1]
n.join.to_i
end

Expand Down
3 changes: 2 additions & 1 deletion spec/satoshi_spec.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -14,11 +14,12 @@
expect(Satoshi.new(1.00).to_btc).to eq(1)
expect(Satoshi.new(1.08763).to_btc).to eq(1.08763)
expect(Satoshi.new(1.08763).to_mbtc).to eq(1087.63)
expect(Satoshi.new(1.08763).to_bits).to eq(1087630.0)
expect(Satoshi.new(-1.08763).to_mbtc).to eq(-1087.63)
expect(Satoshi.new(0.00000001).to_i).to eq(1)
expect(Satoshi.new(0.00000001).to_mbtc).to eq(0.00001)
end

it "converts from various source denominations" do
expect(Satoshi.new(1, unit: 'mbtc').to_btc).to eq(0.001)
expect(Satoshi.new(1, unit: 'mbtc').to_unit).to eq(1)
Expand Down