An Yggdrasil address miner in Go - migrated to GitHub https://github.com/tdemin/syg_go
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package main
import (
"github.com/yggdrasil-network/yggdrasil-go/src/address"
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
)
// custom function selectors, see crypto_xxx.go
var (
addrForNodeID func(*crypto.NodeID) *address.Address
)
// AddrForNodeID is a variant of Yggdrasil's src/address.AddrForNodeID that
// might be slightly optimized for performance.
//
// This function is a modded variant of address.AddrForNodeID from Yggdrasil.
// See src/address/address.go@78b5f88e4bb734d0dd6a138ff08d34ca39dcaea3
func AddrForNodeID(nid *crypto.NodeID) *address.Address {
// 128 bit address, begins with GetPrefix(), with last bit set to 0
// (indicates an address). Next 7 bits, interpreted as a uint, are the count
// of leading 1s in the NodeID. Leading 1s and first leading 0 of the NodeID
// are truncated off. The rest is appended to the IPv6 address (truncated to
// 128 bits total).
var addr address.Address
temp := make([]byte, 0, len(nid))
done := false
ones := byte(0)
bits := byte(0)
nBits := 0
for idx := 0; idx < 8*len(nid); idx++ {
bit := (nid[idx/8] & (0x80 >> byte(idx%8))) >> byte(7-(idx%8))
if !done && bit != 0 {
ones++
continue
}
if !done && bit == 0 {
done = true
continue
}
bits = (bits << 1) | bit
nBits++
if nBits == 8 {
nBits = 0
temp = append(temp, bits)
}
}
prefix := address.GetPrefix()
copy(addr[:], prefix[:])
addr[len(prefix)] = ones
copy(addr[len(prefix)+1:], temp)
return &addr
}