578 bytes added
, 16:00, 28 July 2016
=Request=
{| class="wikitable" border="1"
|-
! Index Word
! Description
|-
| 0
| Header code [0x00240040]
|-
| 1
| principalId
|}
This function takes the principalId given and applies SHA-1 over it (byte order: little endian). The first byte of the SHA-1 digest is then shifted right by 1, which forms the checksum byte.
It returns an u64. The lower word is the principalId, the upper word is the checksum byte.
=Response=
{| class="wikitable" border="1"
|-
! Index Word
! Description
|-
| 0
| Header code
|-
| 1
| Result code
|-
| 2-3
| (u64)the shareable friend code
|}