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wallet: feature: transfer amount with fee included

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To transfer ~5 XMR to an address such that your balance drops by exactly 5 XMR, provide a `subtractfeefrom` flag to the `transfer` command. For example:

    transfer 76bDHojqFYiFCCYYtzTveJ8oFtmpNp3X1TgV2oKP7rHmZyFK1RvyE4r8vsJzf7SyNohMnbKT9wbcD3XUTgsZLX8LU5JBCfm 5 subtractfeefrom=all

If my walet balance was exactly 30 XMR before this transaction, it will be exactly 25 XMR afterwards and the destination address will receive slightly
less than 5 XMR. You can manually select which destinations fund the transaction fee and which ones do not by providing the destination index.
For example:

    transfer 75sr8AAr... 3 74M7W4eg... 4 7AbWqDZ6... 5 subtractfeefrom=0,2

This will drop your balance by exactly 12 XMR including fees and will spread the fee cost proportionally (3:5 ratio) over destinations with addresses
`75sr8AAr...` and `7AbWqDZ6...`, respectively.

Disclaimer: This feature was paid for by @LocalMonero.
This commit is contained in:
jeffro256 2023-05-14 11:41:59 -05:00
parent 059028a30a
commit b13c5f6669
No known key found for this signature in database
GPG key ID: 6F79797A6E392442
10 changed files with 405 additions and 43 deletions
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57
tests/unit_tests/epee_utils.cpp
View file

@ -1852,3 +1852,60 @@ TEST(parsing, unicode)
epee::misc_utils::parse::match_string2(si, s.end(), bs);
EXPECT_EQ(bs, "あまやかす");
}
TEST(parsing, strtoul)
{
long ul;
const char* p;
const char* endp;
errno = 0; // Some libc's only set errno on failure, some set it to 0 on success
p = "0";
endp = nullptr;
ul = std::strtoul(p, const_cast<char**>(&endp), 10);
EXPECT_EQ(0, errno);
EXPECT_EQ(0, ul);
EXPECT_EQ(p + 1, endp);
p = "000000";
endp = nullptr;
ul = std::strtoul(p, const_cast<char**>(&endp), 10);
EXPECT_EQ(0, errno);
EXPECT_EQ(0, ul);
EXPECT_EQ(p + 6, endp);
p = "1";
endp = nullptr;
ul = std::strtoul(p, const_cast<char**>(&endp), 10);
EXPECT_EQ(0, errno);
EXPECT_EQ(1, ul);
EXPECT_EQ(p + 1, endp);
p = "0q";
endp = nullptr;
ul = std::strtoul(p, const_cast<char**>(&endp), 10);
EXPECT_EQ(0, errno);
EXPECT_EQ(0, ul);
EXPECT_EQ(p + 1, endp);
p = " \t 0";
endp = nullptr;
ul = std::strtoul(p, const_cast<char**>(&endp), 10);
EXPECT_EQ(0, errno);
EXPECT_EQ(0, ul);
EXPECT_EQ(p + 9, endp);
p = "q";
endp = nullptr;
ul = std::strtoul(p, const_cast<char**>(&endp), 10);
EXPECT_EQ(0, errno);
EXPECT_EQ(0, ul);
EXPECT_EQ(p, endp);
p = "999999999999999999999999999999999999999";
endp = nullptr;
ul = std::strtoul(p, const_cast<char**>(&endp), 10);
EXPECT_EQ(ERANGE, errno);
EXPECT_EQ(ULLONG_MAX, ul);
}