treehash_setup
treehash_setup(pk, params->h, 0, state, sk+4, params, sk+4+2*n, addr);
treehash_setup(pk, params->xmss_par.h, 0, states + i, sk+params->index_len, &(params->xmss_par), pk+n, addr);
treehash_setup(pk, params->xmss_par.h, 0, states + i, sk+params->index_len, &(params->xmss_par), pk+n, addr);