How to Create a Multisig Address

To receive payment you must first create a multisig payment address. This example shows a "2 of 3" address, however it can be generalized to any "m of n" scenario.

From three random seeds, generate three private keys and corresponding public keys.

$ bx seed | bx ec-new | bx ec-to-public

6b3f9712911f3262fe72de340f0cbb8d (seed #1)
9d695afea1c3ab99e11248e4b74e698332b11f5c5c051e6e80da61aa19ae7c89 (private key #1)
02b66fcb1064d827094685264aaa90d0126861688932eafbd1d1a4ba149de3308b (public key #1)

$ bx seed | bx ec-new | bx ec-to-public

ca5167e564d813d6011ce02679a2c252 (seed #2)
68ebab45a918444d7e088c49bda76d7df89b9ea6ba5ddeb1aab5945391828b83 (private key #2)
025cab5e31095551582630f168280a38eb3a62b0b3e230b20f8807fc5463ccca3c (public key #2)

$ bx seed | bx ec-new | bx ec-to-public

d4ec97842cf63764ed261ea80f221a69 (seed #3)
d1a7069b6057195545d4d9048887dd22be97f16bf463c201b76f8bb05ed423ee (private key #3)
021098babedb3408e9ac2984adcf2a8e4c48e56a785065893f76d0fa0ff507f010 (public key #3)

Use the public keys to create the redeem script and the corresponding script hash address using a multisig script. The "2" represents the number signatures required to spend money received at the address and the "3" represents the number of possible signatures.

$ bx script-to-address "2 [ 02b66fcb1064d827094685264aaa90d0126861688932eafbd1d1a4ba149de3308b ] [ 025cab5e31095551582630f168280a38eb3a62b0b3e230b20f8807fc5463ccca3c ] [ 021098babedb3408e9ac2984adcf2a8e4c48e56a785065893f76d0fa0ff507f010 ] 3 checkmultisig"

3A6oGpJ5MzABAj9PofXKjcpTJCgYrdGBNJ

This example is a continued in How to Spend From a Multisig Address.