payment: fix exported method signature
payment: fix exported method signature

sinan/koding,acbodine/koding,kwagdy/koding-1,alex-ionochkin/koding,koding/koding,andrewjcasal/koding,andrewjcasal/koding,gokmen/koding,alex-ionochkin/koding,jack89129/koding,mertaytore/koding,alex-ionochkin/koding,gokmen/koding,acbodine/koding,cihangir/koding,drewsetski/koding,koding/koding,szkl/koding,andrewjcasal/koding,jack89129/koding,drewsetski/koding,jack89129/koding,sinan/koding,kwagdy/koding-1,acbodine/koding,kwagdy/koding-1,koding/koding,szkl/koding,rjeczalik/koding,usirin/koding,szkl/koding,sinan/koding,alex-ionochkin/koding,kwagdy/koding-1,jack89129/koding,usirin/koding,acbodine/koding,cihangir/koding,rjeczalik/koding,andrewjcasal/koding,usirin/koding,mertaytore/koding,usirin/koding,acbodine/koding,mertaytore/koding,gokmen/koding,acbodine/koding,gokmen/koding,alex-ionochkin/koding,mertaytore/koding,sinan/koding,cihangir/koding,rjeczalik/koding,usirin/koding,drewsetski/koding,usirin/koding,cihangir/koding,andrewjcasal/koding,cihangir/koding,koding/koding,sinan/koding,jack89129/koding,rjeczalik/koding,drewsetski/koding,rjeczalik/koding,szkl/koding,drewsetski/koding,kwagdy/koding-1,koding/koding,gokmen/koding,mertaytore/koding,andrewjcasal/koding,alex-ionochkin/koding,gokmen/koding,andrewjcasal/koding,gokmen/koding,szkl/koding,kwagdy/koding-1,rjeczalik/koding,acbodine/koding,cihangir/koding,mertaytore/koding,alex-ionochkin/koding,mertaytore/koding,drewsetski/koding,drewsetski/koding,koding/koding,rjeczalik/koding,kwagdy/koding-1,gokmen/koding,sinan/koding,cihangir/koding,rjeczalik/koding,usirin/koding,acbodine/koding,andrewjcasal/koding,cihangir/koding,jack89129/koding,drewsetski/koding,szkl/koding,jack89129/koding,alex-ionochkin/koding,szkl/koding,koding/koding,jack89129/koding,kwagdy/koding-1,sinan/koding,sinan/koding,koding/koding,szkl/koding,mertaytore/koding,usirin/koding