As of now (February 2014), how easy is it to have a transaction which makes use of OP_RETURN data confirmed into a block?

Do standard nodes forward such transactions yet? Have major mining pools committed to support?

Are there specific steps that can improve the chances of such a transaction being mined, like connecting to certain nodes with advertised support, or adding extra transaction fees?

  • This site shows you all recently embedded OP_RETURNs: coinsecrets.org – user14785 Mar 24 '14 at 7:04

It will take until bitcoind version 0.9 for wide spread support for relaying OP_RETURN.

Adding fees will not help. Currently, transactions with OP_RETURN are by default not relayed by the main net (last sentence): https://en.bitcoin.it/wiki/Script#Provably_Unspendable.2FPrunable_Outputs

P2Pool seems to accept them, so that could be a solution for you: submit them to a P2Pool node.

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