I've just joined the list with the goals of producing a patch to sendtoaddress in rpc.cpp to support DNS lookups so that one could publish a TXT record in the DNS with their wallet address to facilitate sending of coin.

I'm proposing something like the code below, which works but needs additional error handling.

also working on a internet-draft to describe how to put bitcoin addresses in the DNS which I hope to post the first draft of this week.

I'd appreciate comments on issues around annomity, community push back and any other issues you might have with leveraging the DNS for bitcoin transactions.

thanks,

-rick

Value sendtoaddress(const Array& params, bool fHelp)
{
if (fHelp || params.size() < 2 || params.size() > 4)
throw runtime_error(
"sendtoaddress <bitcoinaddress> <amount> [comment] [comment-to]\n"
"<amount> is a real and is rounded to the nearest 0.00000001");

/**
; <<>> DiG 9.7.3 <<>> _btc.rick.wesson.us txt
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43754
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;_btc.rick.wesson.us. IN TXT

;; ANSWER SECTION:
_btc.rick.wesson.us. 300 IN TXT "BTC=1; 1GCVXLfF1TcpnnDLJRHk845NZhuJWQTnUD"

;; Query time: 143 msec
**/

string strAddress = params[0].get_str();
string dname="_btc.";
if(strAddress.find("@")){
unsigned char answer[255];
int len=0;
dname.append(strAddress);
dname.replace(dname.find("@"), 1, ".");

if((len = res_query(dname.c_str(), C_IN, T_TXT, answer, PACKETSZ)) < 0) {
string dnsAnswer=(char*)answer;
int i=dnsAnswer.find("BTC=1;");
if( i < 0) throw runtime_error( dname + " is not associated with a bitcoin address");
i += 6;
i = dnsAnswer.find("1", 6) ; // address start with a one (1)
dnsAnswer.erase(0,i);
strAddress=dnsAnswer;
}

}
// Amount
int64 nAmount = AmountFromValue(params[1]);
...