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< h1 id = "integrated-address" > Integrated address< / h1 >
< p > Monero integrated address embeds a compact payment ID.< / p >
< p > Monero integrated address obsoletes the former practice of using full 32-bytes payment ID in a transaction extra field (where it was not encrypted).< / p >
< p > Data structure (< a href = "https://github.com/monero-project/monero/blob/f7b9f44c1b0d53170fd7f53d37fc67648f3247a2/src/cryptonote_basic/cryptonote_basic_impl.cpp#L172" > src< / a > ):< / p >
< table >
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< tr >
< th > Index< / th >
< th > Size in bytes< / th >
< th > Description< / th >
< / tr >
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< tbody >
< tr >
< td > 0< / td >
< td > 1< / td >
< td > identifies the network and address type; < a href = "https://github.com/monero-project/monero/blob/793bc973746a10883adb2f89827e223f562b9651/src/cryptonote_config.h#L150" > 19< / a > - main chain; < a href = "https://github.com/monero-project/monero/blob/793bc973746a10883adb2f89827e223f562b9651/src/cryptonote_config.h#L162" > 54< / a > - test chain< / td >
< / tr >
< tr >
< td > 1< / td >
< td > 32< / td >
< td > public spend key< / td >
< / tr >
< tr >
< td > 33< / td >
< td > 32< / td >
< td > public view key< / td >
< / tr >
< tr >
< td > 65< / td >
< td > 8< / td >
< td > compact payment ID - 8 bytes randomly generated by the recipient; note that it does not need encryption in the address itself but it is hidden in a transaction paying to integrated address to prevent linking payment with the address by external observers< / td >
< / tr >
< tr >
< td > 73< / td >
< td > 4< / td >
< td > checksum (< a href = "https://github.com/monero-project/monero/blob/8f1f43163a221153403a46902d026e3b72f1b3e3/src/common/base58.cpp#L261" > Keccak-f[1600] hash< / a > of the previous 73 bytes, trimmed to first < a href = "https://github.com/monero-project/monero/blob/8f1f43163a221153403a46902d026e3b72f1b3e3/src/common/base58.cpp#L53" > 4< / a > bytes)< / td >
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< p > It totals to 78 bytes. The bytes are then encoded (< a href = "https://github.com/monero-project/monero/blob/8f1f43163a221153403a46902d026e3b72f1b3e3/src/common/base58.cpp#L240" > src< / a > ) in < a href = "../Monero-Base58" > Monero specific Base58< / a > format, resulting in a 106 chars long string. Example integrated address:< / p >
< p > < code > 4LL9oSLmtpccfufTMvppY6JwXNouMBzSkbLYfpAV5Usx3skxNgYeYTRj5UzqtReoS44qo9mtmXCqY45DJ852K5Jv2bYXZKKQePHES9khPK< / code > < / p >
< h2 id = "reference" > Reference:< / h2 >
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< li > question on < a href = "https://monero.stackexchange.com/questions/3179/what-is-an-integrated-address" > StackExchenge< / a > < / li >
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