/
market-proxy.js
90 lines (87 loc) · 1.83 KB
/
market-proxy.js
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const anchor = require("@project-serum/anchor");
const {
PublicKey,
SYSVAR_RENT_PUBKEY,
SYSVAR_CLOCK_PUBKEY,
} = require("@solana/web3.js");
const {
OpenOrders,
OpenOrdersPda,
Logger,
ReferralFees,
MarketProxyBuilder,
} = require("@project-serum/serum");
// Returns a client for the market proxy.
//
// If changing the program, one will likely need to change the builder/middleware
// here as well.
async function load(connection, proxyProgramId, dexProgramId, market) {
return new MarketProxyBuilder()
.middleware(
new OpenOrdersPda({
proxyProgramId,
dexProgramId,
})
)
.middleware(new ReferralFees())
.middleware(new Identity())
.middleware(new Logger())
.load({
connection,
market,
dexProgramId,
proxyProgramId,
options: { commitment: "recent" },
});
}
// Dummy identity middleware used for testing.
class Identity {
initOpenOrders(ix) {
this.proxy(ix);
}
newOrderV3(ix) {
this.proxy(ix);
}
cancelOrderV2(ix) {
this.proxy(ix);
}
cancelOrderByClientIdV2(ix) {
this.proxy(ix);
}
settleFunds(ix) {
this.proxy(ix);
}
closeOpenOrders(ix) {
this.proxy(ix);
}
prune(ix) {
this.proxyRevoked(ix);
}
proxy(ix) {
ix.keys = [
{ pubkey: SYSVAR_RENT_PUBKEY, isWritable: false, isSigner: false },
...ix.keys,
];
}
proxyRevoked(ix) {
ix.keys = [
{ pubkey: SYSVAR_CLOCK_PUBKEY, isWritable: false, isSigner: false },
...ix.keys,
];
}
static async pruneAuthority(market, dexProgramId, proxyProgramId) {
const [addr] = await PublicKey.findProgramAddress(
[
anchor.utils.bytes.utf8.encode("prune"),
dexProgramId.toBuffer(),
market.toBuffer(),
],
proxyProgramId
);
return addr;
}
}
module.exports = {
load,
Identity,
};