Why a flip a bin before hashing in this script?

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2
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From How can I make this PHP merkle root script recursive?

function binFlipByteOrder($string) {

    return implode('', array_reverse(str_split($string, 1)));

}

Why a flip?

edited Nov 27 at 0:42

Glorfindel

2401412

asked Nov 26 at 15:08

Nicolas Cantu

135

add a comment |

up vote
2
down vote

favorite

From How can I make this PHP merkle root script recursive?

function binFlipByteOrder($string) {

    return implode('', array_reverse(str_split($string, 1)));

}

Why a flip?

edited Nov 27 at 0:42

Glorfindel

2401412

asked Nov 26 at 15:08

Nicolas Cantu

135

add a comment |

up vote
2
down vote

favorite

From How can I make this PHP merkle root script recursive?

function binFlipByteOrder($string) {

    return implode('', array_reverse(str_split($string, 1)));

}

Why a flip?

edited Nov 27 at 0:42

Glorfindel

2401412

asked Nov 26 at 15:08

Nicolas Cantu

135

From How can I make this PHP merkle root script recursive?

function binFlipByteOrder($string) {

    return implode('', array_reverse(str_split($string, 1)));

}

Why a flip?

blockchain php

edited Nov 27 at 0:42

Glorfindel

2401412

asked Nov 26 at 15:08

Nicolas Cantu

135

edited Nov 27 at 0:42

Glorfindel

2401412

asked Nov 26 at 15:08

Nicolas Cantu

135

edited Nov 27 at 0:42

Glorfindel

2401412

edited Nov 27 at 0:42

Glorfindel

2401412

edited Nov 27 at 0:42

Glorfindel

2401412

asked Nov 26 at 15:08

Nicolas Cantu

135

asked Nov 26 at 15:08

Nicolas Cantu

135

asked Nov 26 at 15:08

Nicolas Cantu

135

add a comment |

1 Answer
1

active

oldest

votes

up vote
3
down vote

accepted

Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?

answered Nov 26 at 15:28

JBaczuk

3,7941321

Ok thanks you! (I suspected the Lilliputians..)
– Nicolas Cantu
Nov 26 at 15:37

haha they are alive and well in Bitcoin... :)
– JBaczuk
Nov 26 at 15:37

Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
– Nicolas Cantu
Nov 27 at 0:26

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
3
down vote

accepted

Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?

answered Nov 26 at 15:28

JBaczuk

3,7941321

Ok thanks you! (I suspected the Lilliputians..)
– Nicolas Cantu
Nov 26 at 15:37

haha they are alive and well in Bitcoin... :)
– JBaczuk
Nov 26 at 15:37

Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
– Nicolas Cantu
Nov 27 at 0:26

add a comment |

up vote
3
down vote

accepted

Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?

answered Nov 26 at 15:28

JBaczuk

3,7941321

Ok thanks you! (I suspected the Lilliputians..)
– Nicolas Cantu
Nov 26 at 15:37

haha they are alive and well in Bitcoin... :)
– JBaczuk
Nov 26 at 15:37

Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
– Nicolas Cantu
Nov 27 at 0:26

add a comment |

up vote
3
down vote

accepted

Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?

answered Nov 26 at 15:28

JBaczuk

3,7941321

Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?

answered Nov 26 at 15:28

JBaczuk

3,7941321

answered Nov 26 at 15:28

JBaczuk

3,7941321

answered Nov 26 at 15:28

JBaczuk

3,7941321

answered Nov 26 at 15:28

JBaczuk

3,7941321

Ok thanks you! (I suspected the Lilliputians..)
– Nicolas Cantu
Nov 26 at 15:37

haha they are alive and well in Bitcoin... :)
– JBaczuk
Nov 26 at 15:37

Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
– Nicolas Cantu
Nov 27 at 0:26

add a comment |

Ok thanks you! (I suspected the Lilliputians..)
– Nicolas Cantu
Nov 26 at 15:37

haha they are alive and well in Bitcoin... :)
– JBaczuk
Nov 26 at 15:37

Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
– Nicolas Cantu
Nov 27 at 0:26

Ok thanks you! (I suspected the Lilliputians..)
– Nicolas Cantu
Nov 26 at 15:37

haha they are alive and well in Bitcoin... :)
– JBaczuk
Nov 26 at 15:37

Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
– Nicolas Cantu
Nov 27 at 0:26

add a comment |

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