dumpprivkey

wallet wallet since 0.6.0

reveals the private key corresponding to 'address'.

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Wallet RPC, not available on our node. Wallet operation. Our node runs without a wallet, so this RPC is structurally unreachable here. Docs are kept for reference.
Call from your own code

Replace $BITCOIN_RPC_USER / $BITCOIN_RPC_PASSWORD with credentials from your bitcoind's bitcoin.conf, and replace localhost:8332 with your node's RPC address. You can't run this RPC against our node (we run wallet=0), but you can run it against your own bitcoind.

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dumpprivkey "address"

Reveals the private key corresponding to 'address'.
Then the importprivkey can be used with this output

Arguments:
1. address    (string, required) The bitcoin address for the private key

Result:
"str"    (string) The private key

Examples:
> bitcoin-cli dumpprivkey "myaddress"
> bitcoin-cli importprivkey "mykey"
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "dumpprivkey", "params": ["myaddress"]}' -H 'content-type: text/plain;' http://127.0.0.1:8332/
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